| /* |
| * Copyright (c) 2007, 2015, Oracle and/or its affiliates. All rights reserved. |
| */ |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| /* |
| * $Id: Stylesheet.java,v 1.5 2005/09/28 13:48:16 pvedula Exp $ |
| */ |
| |
| package com.sun.org.apache.xalan.internal.xsltc.compiler; |
| |
| import com.sun.org.apache.bcel.internal.generic.ANEWARRAY; |
| import com.sun.org.apache.bcel.internal.generic.BasicType; |
| import com.sun.org.apache.bcel.internal.generic.ConstantPoolGen; |
| import com.sun.org.apache.bcel.internal.generic.FieldGen; |
| import com.sun.org.apache.bcel.internal.generic.GETFIELD; |
| import com.sun.org.apache.bcel.internal.generic.GETSTATIC; |
| import com.sun.org.apache.bcel.internal.generic.INVOKEINTERFACE; |
| import com.sun.org.apache.bcel.internal.generic.INVOKESPECIAL; |
| import com.sun.org.apache.bcel.internal.generic.INVOKEVIRTUAL; |
| import com.sun.org.apache.bcel.internal.generic.ISTORE; |
| import com.sun.org.apache.bcel.internal.generic.InstructionHandle; |
| import com.sun.org.apache.bcel.internal.generic.InstructionList; |
| import com.sun.org.apache.bcel.internal.generic.LocalVariableGen; |
| import com.sun.org.apache.bcel.internal.generic.NEW; |
| import com.sun.org.apache.bcel.internal.generic.NEWARRAY; |
| import com.sun.org.apache.bcel.internal.generic.PUSH; |
| import com.sun.org.apache.bcel.internal.generic.PUTFIELD; |
| import com.sun.org.apache.bcel.internal.generic.PUTSTATIC; |
| import com.sun.org.apache.bcel.internal.generic.TargetLostException; |
| import com.sun.org.apache.bcel.internal.util.InstructionFinder; |
| import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ClassGenerator; |
| import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ErrorMsg; |
| import com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodGenerator; |
| import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type; |
| import com.sun.org.apache.xalan.internal.xsltc.compiler.util.TypeCheckError; |
| import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Util; |
| import com.sun.org.apache.xalan.internal.xsltc.runtime.AbstractTranslet; |
| import com.sun.org.apache.xml.internal.dtm.DTM; |
| import com.sun.org.apache.xml.internal.utils.SystemIDResolver; |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Properties; |
| import java.util.StringTokenizer; |
| import java.util.Vector; |
| |
| /** |
| * @author Jacek Ambroziak |
| * @author Santiago Pericas-Geertsen |
| * @author Morten Jorgensen |
| */ |
| public final class Stylesheet extends SyntaxTreeNode { |
| |
| /** |
| * XSLT version defined in the stylesheet. |
| */ |
| private String _version; |
| |
| /** |
| * Internal name of this stylesheet used as a key into the symbol table. |
| */ |
| private QName _name; |
| |
| /** |
| * A URI that represents the system ID for this stylesheet. |
| */ |
| private String _systemId; |
| |
| /** |
| * A reference to the parent stylesheet or null if topmost. |
| */ |
| private Stylesheet _parentStylesheet; |
| |
| /** |
| * Contains global variables and parameters defined in the stylesheet. |
| */ |
| private Vector _globals = new Vector(); |
| |
| /** |
| * Used to cache the result returned by <code>hasLocalParams()</code>. |
| */ |
| private Boolean _hasLocalParams = null; |
| |
| /** |
| * The name of the class being generated. |
| */ |
| private String _className; |
| |
| /** |
| * Contains all templates defined in this stylesheet |
| */ |
| private final Vector _templates = new Vector(); |
| |
| /** |
| * Used to cache result of <code>getAllValidTemplates()</code>. Only |
| * set in top-level stylesheets that include/import other stylesheets. |
| */ |
| private Vector _allValidTemplates = null; |
| |
| /** |
| * Counter to generate unique mode suffixes. |
| */ |
| private int _nextModeSerial = 1; |
| |
| /** |
| * Mapping between mode names and Mode instances. |
| */ |
| private final Map<String, Mode> _modes = new HashMap<>(); |
| |
| /** |
| * A reference to the default Mode object. |
| */ |
| private Mode _defaultMode; |
| |
| /** |
| * Mapping between extension URIs and their prefixes. |
| */ |
| private final Map<String, String> _extensions = new HashMap<>(); |
| |
| /** |
| * Reference to the stylesheet from which this stylesheet was |
| * imported (if any). |
| */ |
| public Stylesheet _importedFrom = null; |
| |
| /** |
| * Reference to the stylesheet from which this stylesheet was |
| * included (if any). |
| */ |
| public Stylesheet _includedFrom = null; |
| |
| /** |
| * Array of all the stylesheets imported or included from this one. |
| */ |
| private Vector _includedStylesheets = null; |
| |
| /** |
| * Import precendence for this stylesheet. |
| */ |
| private int _importPrecedence = 1; |
| |
| /** |
| * Minimum precendence of any descendant stylesheet by inclusion or |
| * importation. |
| */ |
| private int _minimumDescendantPrecedence = -1; |
| |
| /** |
| * Mapping between key names and Key objects (needed by Key/IdPattern). |
| */ |
| private Map<String, Key> _keys = new HashMap<>(); |
| |
| /** |
| * A reference to the SourceLoader set by the user (a URIResolver |
| * if the JAXP API is being used). |
| */ |
| private SourceLoader _loader = null; |
| |
| /** |
| * Flag indicating if format-number() is called. |
| */ |
| private boolean _numberFormattingUsed = false; |
| |
| /** |
| * Flag indicating if this is a simplified stylesheets. A template |
| * matching on "/" must be added in this case. |
| */ |
| private boolean _simplified = false; |
| |
| /** |
| * Flag indicating if multi-document support is needed. |
| */ |
| private boolean _multiDocument = false; |
| |
| /** |
| * Flag indicating if nodset() is called. |
| */ |
| private boolean _callsNodeset = false; |
| |
| /** |
| * Flag indicating if id() is called. |
| */ |
| private boolean _hasIdCall = false; |
| |
| /** |
| * Set to true to enable template inlining optimization. |
| * @see XSLTC#_templateInlining |
| */ |
| private boolean _templateInlining = false; |
| |
| /** |
| * A reference to the last xsl:output object found in the styleshet. |
| */ |
| private Output _lastOutputElement = null; |
| |
| /** |
| * Output properties for this stylesheet. |
| */ |
| private Properties _outputProperties = null; |
| |
| /** |
| * Output method for this stylesheet (must be set to one of |
| * the constants defined below). |
| */ |
| private int _outputMethod = UNKNOWN_OUTPUT; |
| |
| // Output method constants |
| public static final int UNKNOWN_OUTPUT = 0; |
| public static final int XML_OUTPUT = 1; |
| public static final int HTML_OUTPUT = 2; |
| public static final int TEXT_OUTPUT = 3; |
| |
| /** |
| * Return the output method |
| */ |
| public int getOutputMethod() { |
| return _outputMethod; |
| } |
| |
| /** |
| * Check and set the output method |
| */ |
| private void checkOutputMethod() { |
| if (_lastOutputElement != null) { |
| String method = _lastOutputElement.getOutputMethod(); |
| if (method != null) { |
| if (method.equals("xml")) |
| _outputMethod = XML_OUTPUT; |
| else if (method.equals("html")) |
| _outputMethod = HTML_OUTPUT; |
| else if (method.equals("text")) |
| _outputMethod = TEXT_OUTPUT; |
| } |
| } |
| } |
| |
| public boolean getTemplateInlining() { |
| return _templateInlining; |
| } |
| |
| public void setTemplateInlining(boolean flag) { |
| _templateInlining = flag; |
| } |
| |
| public boolean isSimplified() { |
| return(_simplified); |
| } |
| |
| public void setSimplified() { |
| _simplified = true; |
| } |
| |
| public void setHasIdCall(boolean flag) { |
| _hasIdCall = flag; |
| } |
| |
| public void setOutputProperty(String key, String value) { |
| if (_outputProperties == null) { |
| _outputProperties = new Properties(); |
| } |
| _outputProperties.setProperty(key, value); |
| } |
| |
| public void setOutputProperties(Properties props) { |
| _outputProperties = props; |
| } |
| |
| public Properties getOutputProperties() { |
| return _outputProperties; |
| } |
| |
| public Output getLastOutputElement() { |
| return _lastOutputElement; |
| } |
| |
| public void setMultiDocument(boolean flag) { |
| _multiDocument = flag; |
| } |
| |
| public boolean isMultiDocument() { |
| return _multiDocument; |
| } |
| |
| public void setCallsNodeset(boolean flag) { |
| if (flag) setMultiDocument(flag); |
| _callsNodeset = flag; |
| } |
| |
| public boolean callsNodeset() { |
| return _callsNodeset; |
| } |
| |
| public void numberFormattingUsed() { |
| _numberFormattingUsed = true; |
| /* |
| * Fix for bug 23046, if the stylesheet is included, set the |
| * numberFormattingUsed flag to the parent stylesheet too. |
| * AbstractTranslet.addDecimalFormat() will be inlined once for the |
| * outer most stylesheet. |
| */ |
| Stylesheet parent = getParentStylesheet(); |
| if (null != parent) parent.numberFormattingUsed(); |
| } |
| |
| public void setImportPrecedence(final int precedence) { |
| // Set import precedence for this stylesheet |
| _importPrecedence = precedence; |
| |
| // Set import precedence for all included stylesheets |
| final Iterator<SyntaxTreeNode> elements = elements(); |
| while (elements.hasNext()) { |
| SyntaxTreeNode child = elements.next(); |
| if (child instanceof Include) { |
| Stylesheet included = ((Include)child).getIncludedStylesheet(); |
| if (included != null && included._includedFrom == this) { |
| included.setImportPrecedence(precedence); |
| } |
| } |
| } |
| |
| // Set import precedence for the stylesheet that imported this one |
| if (_importedFrom != null) { |
| if (_importedFrom.getImportPrecedence() < precedence) { |
| final Parser parser = getParser(); |
| final int nextPrecedence = parser.getNextImportPrecedence(); |
| _importedFrom.setImportPrecedence(nextPrecedence); |
| } |
| } |
| // Set import precedence for the stylesheet that included this one |
| else if (_includedFrom != null) { |
| if (_includedFrom.getImportPrecedence() != precedence) |
| _includedFrom.setImportPrecedence(precedence); |
| } |
| } |
| |
| public int getImportPrecedence() { |
| return _importPrecedence; |
| } |
| |
| /** |
| * Get the minimum of the precedence of this stylesheet, any stylesheet |
| * imported by this stylesheet and any include/import descendant of this |
| * stylesheet. |
| */ |
| public int getMinimumDescendantPrecedence() { |
| if (_minimumDescendantPrecedence == -1) { |
| // Start with precedence of current stylesheet as a basis. |
| int min = getImportPrecedence(); |
| |
| // Recursively examine all imported/included stylesheets. |
| final int inclImpCount = (_includedStylesheets != null) |
| ? _includedStylesheets.size() |
| : 0; |
| |
| for (int i = 0; i < inclImpCount; i++) { |
| int prec = ((Stylesheet)_includedStylesheets.elementAt(i)) |
| .getMinimumDescendantPrecedence(); |
| |
| if (prec < min) { |
| min = prec; |
| } |
| } |
| |
| _minimumDescendantPrecedence = min; |
| } |
| return _minimumDescendantPrecedence; |
| } |
| |
| public boolean checkForLoop(String systemId) { |
| // Return true if this stylesheet includes/imports itself |
| if (_systemId != null && _systemId.equals(systemId)) { |
| return true; |
| } |
| // Then check with any stylesheets that included/imported this one |
| if (_parentStylesheet != null) |
| return _parentStylesheet.checkForLoop(systemId); |
| // Otherwise OK |
| return false; |
| } |
| |
| public void setParser(Parser parser) { |
| super.setParser(parser); |
| _name = makeStylesheetName("__stylesheet_"); |
| } |
| |
| public void setParentStylesheet(Stylesheet parent) { |
| _parentStylesheet = parent; |
| } |
| |
| public Stylesheet getParentStylesheet() { |
| return _parentStylesheet; |
| } |
| |
| public void setImportingStylesheet(Stylesheet parent) { |
| _importedFrom = parent; |
| parent.addIncludedStylesheet(this); |
| } |
| |
| public void setIncludingStylesheet(Stylesheet parent) { |
| _includedFrom = parent; |
| parent.addIncludedStylesheet(this); |
| } |
| |
| public void addIncludedStylesheet(Stylesheet child) { |
| if (_includedStylesheets == null) { |
| _includedStylesheets = new Vector(); |
| } |
| _includedStylesheets.addElement(child); |
| } |
| |
| public void setSystemId(String systemId) { |
| if (systemId != null) { |
| _systemId = SystemIDResolver.getAbsoluteURI(systemId); |
| } |
| } |
| |
| public String getSystemId() { |
| return _systemId; |
| } |
| |
| public void setSourceLoader(SourceLoader loader) { |
| _loader = loader; |
| } |
| |
| public SourceLoader getSourceLoader() { |
| return _loader; |
| } |
| |
| private QName makeStylesheetName(String prefix) { |
| return getParser().getQName(prefix+getXSLTC().nextStylesheetSerial()); |
| } |
| |
| /** |
| * Returns true if this stylesheet has global vars or params. |
| */ |
| public boolean hasGlobals() { |
| return _globals.size() > 0; |
| } |
| |
| /** |
| * Returns true if at least one template in the stylesheet has params |
| * defined. Uses the variable <code>_hasLocalParams</code> to cache the |
| * result. |
| */ |
| public boolean hasLocalParams() { |
| if (_hasLocalParams == null) { |
| Vector templates = getAllValidTemplates(); |
| final int n = templates.size(); |
| for (int i = 0; i < n; i++) { |
| final Template template = (Template)templates.elementAt(i); |
| if (template.hasParams()) { |
| _hasLocalParams = Boolean.TRUE; |
| return true; |
| } |
| } |
| _hasLocalParams = Boolean.FALSE; |
| return false; |
| } |
| else { |
| return _hasLocalParams.booleanValue(); |
| } |
| } |
| |
| /** |
| * Adds a single prefix mapping to this syntax tree node. |
| * @param prefix Namespace prefix. |
| * @param uri Namespace URI. |
| */ |
| protected void addPrefixMapping(String prefix, String uri) { |
| if (prefix.equals(EMPTYSTRING) && uri.equals(XHTML_URI)) return; |
| super.addPrefixMapping(prefix, uri); |
| } |
| |
| /** |
| * Store extension URIs |
| */ |
| private void extensionURI(String prefixes, SymbolTable stable) { |
| if (prefixes != null) { |
| StringTokenizer tokens = new StringTokenizer(prefixes); |
| while (tokens.hasMoreTokens()) { |
| final String prefix = tokens.nextToken(); |
| final String uri = lookupNamespace(prefix); |
| if (uri != null) { |
| _extensions.put(uri, prefix); |
| } |
| } |
| } |
| } |
| |
| public boolean isExtension(String uri) { |
| return (_extensions.get(uri) != null); |
| } |
| |
| public void declareExtensionPrefixes(Parser parser) { |
| final SymbolTable stable = parser.getSymbolTable(); |
| final String extensionPrefixes = getAttribute("extension-element-prefixes"); |
| extensionURI(extensionPrefixes, stable); |
| } |
| |
| /** |
| * Parse the version and uri fields of the stylesheet and add an |
| * entry to the symbol table mapping the name <tt>__stylesheet_</tt> |
| * to an instance of this class. |
| */ |
| public void parseContents(Parser parser) { |
| final SymbolTable stable = parser.getSymbolTable(); |
| |
| /* |
| // Make sure the XSL version set in this stylesheet |
| if ((_version == null) || (_version.equals(EMPTYSTRING))) { |
| reportError(this, parser, ErrorMsg.REQUIRED_ATTR_ERR,"version"); |
| } |
| // Verify that the version is 1.0 and nothing else |
| else if (!_version.equals("1.0")) { |
| reportError(this, parser, ErrorMsg.XSL_VERSION_ERR, _version); |
| } |
| */ |
| |
| // Add the implicit mapping of 'xml' to the XML namespace URI |
| addPrefixMapping("xml", "http://www.w3.org/XML/1998/namespace"); |
| |
| // Report and error if more than one stylesheet defined |
| final Stylesheet sheet = stable.addStylesheet(_name, this); |
| if (sheet != null) { |
| // Error: more that one stylesheet defined |
| ErrorMsg err = new ErrorMsg(ErrorMsg.MULTIPLE_STYLESHEET_ERR,this); |
| parser.reportError(Constants.ERROR, err); |
| } |
| |
| // If this is a simplified stylesheet we must create a template that |
| // grabs the root node of the input doc ( <xsl:template match="/"/> ). |
| // This template needs the current element (the one passed to this |
| // method) as its only child, so the Template class has a special |
| // method that handles this (parseSimplified()). |
| if (_simplified) { |
| stable.excludeURI(XSLT_URI); |
| Template template = new Template(); |
| template.parseSimplified(this, parser); |
| } |
| // Parse the children of this node |
| else { |
| parseOwnChildren(parser); |
| } |
| } |
| |
| /** |
| * Parse all direct children of the <xsl:stylesheet/> element. |
| */ |
| public final void parseOwnChildren(Parser parser) { |
| final SymbolTable stable = parser.getSymbolTable(); |
| final String excludePrefixes = getAttribute("exclude-result-prefixes"); |
| final String extensionPrefixes = getAttribute("extension-element-prefixes"); |
| |
| // Exclude XSLT uri |
| stable.pushExcludedNamespacesContext(); |
| stable.excludeURI(Constants.XSLT_URI); |
| stable.excludeNamespaces(excludePrefixes); |
| stable.excludeNamespaces(extensionPrefixes); |
| |
| final List<SyntaxTreeNode> contents = getContents(); |
| final int count = contents.size(); |
| |
| // We have to scan the stylesheet element's top-level elements for |
| // variables and/or parameters before we parse the other elements |
| for (int i = 0; i < count; i++) { |
| SyntaxTreeNode child = contents.get(i); |
| if ((child instanceof VariableBase) || |
| (child instanceof NamespaceAlias)) { |
| parser.getSymbolTable().setCurrentNode(child); |
| child.parseContents(parser); |
| } |
| } |
| |
| // Now go through all the other top-level elements... |
| for (int i = 0; i < count; i++) { |
| SyntaxTreeNode child = contents.get(i); |
| if (!(child instanceof VariableBase) && |
| !(child instanceof NamespaceAlias)) { |
| parser.getSymbolTable().setCurrentNode(child); |
| child.parseContents(parser); |
| } |
| |
| // All template code should be compiled as methods if the |
| // <xsl:apply-imports/> element was ever used in this stylesheet |
| if (!_templateInlining && (child instanceof Template)) { |
| Template template = (Template)child; |
| String name = "template$dot$" + template.getPosition(); |
| template.setName(parser.getQName(name)); |
| } |
| } |
| |
| stable.popExcludedNamespacesContext(); |
| } |
| |
| public void processModes() { |
| if (_defaultMode == null) |
| _defaultMode = new Mode(null, this, Constants.EMPTYSTRING); |
| _defaultMode.processPatterns(_keys); |
| for (Mode mode : _modes.values()) { |
| mode.processPatterns(_keys); |
| } |
| } |
| |
| private void compileModes(ClassGenerator classGen) { |
| _defaultMode.compileApplyTemplates(classGen); |
| for (Mode mode : _modes.values()) { |
| mode.compileApplyTemplates(classGen); |
| } |
| } |
| |
| public Mode getMode(QName modeName) { |
| if (modeName == null) { |
| if (_defaultMode == null) { |
| _defaultMode = new Mode(null, this, Constants.EMPTYSTRING); |
| } |
| return _defaultMode; |
| } |
| else { |
| Mode mode = _modes.get(modeName.getStringRep()); |
| if (mode == null) { |
| final String suffix = Integer.toString(_nextModeSerial++); |
| _modes.put(modeName.getStringRep(), mode = new Mode(modeName, this, suffix)); |
| } |
| return mode; |
| } |
| } |
| |
| /** |
| * Type check all the children of this node. |
| */ |
| public Type typeCheck(SymbolTable stable) throws TypeCheckError { |
| final int count = _globals.size(); |
| for (int i = 0; i < count; i++) { |
| final VariableBase var = (VariableBase)_globals.elementAt(i); |
| var.typeCheck(stable); |
| } |
| return typeCheckContents(stable); |
| } |
| |
| /** |
| * Translate the stylesheet into JVM bytecodes. |
| */ |
| public void translate(ClassGenerator classGen, MethodGenerator methodGen) { |
| translate(); |
| } |
| |
| private void addDOMField(ClassGenerator classGen) { |
| final FieldGen fgen = new FieldGen(ACC_PUBLIC, |
| Util.getJCRefType(DOM_INTF_SIG), |
| DOM_FIELD, |
| classGen.getConstantPool()); |
| classGen.addField(fgen.getField()); |
| } |
| |
| /** |
| * Add a static field |
| */ |
| private void addStaticField(ClassGenerator classGen, String type, |
| String name) |
| { |
| final FieldGen fgen = new FieldGen(ACC_PROTECTED|ACC_STATIC, |
| Util.getJCRefType(type), |
| name, |
| classGen.getConstantPool()); |
| classGen.addField(fgen.getField()); |
| |
| } |
| |
| /** |
| * Translate the stylesheet into JVM bytecodes. |
| */ |
| public void translate() { |
| _className = getXSLTC().getClassName(); |
| |
| // Define a new class by extending TRANSLET_CLASS |
| final ClassGenerator classGen = |
| new ClassGenerator(_className, |
| TRANSLET_CLASS, |
| Constants.EMPTYSTRING, |
| ACC_PUBLIC | ACC_SUPER, |
| null, this); |
| |
| addDOMField(classGen); |
| |
| // Compile transform() to initialize parameters, globals & output |
| // and run the transformation |
| compileTransform(classGen); |
| |
| // Translate all non-template elements and filter out all templates |
| final Iterator<SyntaxTreeNode> elements = elements(); |
| while (elements.hasNext()) { |
| SyntaxTreeNode element = elements.next(); |
| // xsl:template |
| if (element instanceof Template) { |
| // Separate templates by modes |
| final Template template = (Template)element; |
| //_templates.addElement(template); |
| getMode(template.getModeName()).addTemplate(template); |
| } |
| // xsl:attribute-set |
| else if (element instanceof AttributeSet) { |
| ((AttributeSet)element).translate(classGen, null); |
| } |
| else if (element instanceof Output) { |
| // save the element for later to pass to compileConstructor |
| Output output = (Output)element; |
| if (output.enabled()) _lastOutputElement = output; |
| } |
| else { |
| // Global variables and parameters are handled elsewhere. |
| // Other top-level non-template elements are ignored. Literal |
| // elements outside of templates will never be output. |
| } |
| } |
| |
| checkOutputMethod(); |
| processModes(); |
| compileModes(classGen); |
| compileStaticInitializer(classGen); |
| compileConstructor(classGen, _lastOutputElement); |
| |
| if (!getParser().errorsFound()) { |
| getXSLTC().dumpClass(classGen.getJavaClass()); |
| } |
| } |
| |
| /** |
| * Compile the namesArray, urisArray and typesArray into |
| * the static initializer. They are read-only from the |
| * translet. All translet instances can share a single |
| * copy of this informtion. |
| */ |
| private void compileStaticInitializer(ClassGenerator classGen) { |
| final ConstantPoolGen cpg = classGen.getConstantPool(); |
| final InstructionList il = new InstructionList(); |
| |
| final MethodGenerator staticConst = |
| new MethodGenerator(ACC_PUBLIC|ACC_STATIC, |
| com.sun.org.apache.bcel.internal.generic.Type.VOID, |
| null, null, "<clinit>", |
| _className, il, cpg); |
| |
| addStaticField(classGen, "[" + STRING_SIG, STATIC_NAMES_ARRAY_FIELD); |
| addStaticField(classGen, "[" + STRING_SIG, STATIC_URIS_ARRAY_FIELD); |
| addStaticField(classGen, "[I", STATIC_TYPES_ARRAY_FIELD); |
| addStaticField(classGen, "[" + STRING_SIG, STATIC_NAMESPACE_ARRAY_FIELD); |
| // Create fields of type char[] that will contain literal text from |
| // the stylesheet. |
| final int charDataFieldCount = getXSLTC().getCharacterDataCount(); |
| for (int i = 0; i < charDataFieldCount; i++) { |
| addStaticField(classGen, STATIC_CHAR_DATA_FIELD_SIG, |
| STATIC_CHAR_DATA_FIELD+i); |
| } |
| |
| // Put the names array into the translet - used for dom/translet mapping |
| final Vector namesIndex = getXSLTC().getNamesIndex(); |
| int size = namesIndex.size(); |
| String[] namesArray = new String[size]; |
| String[] urisArray = new String[size]; |
| int[] typesArray = new int[size]; |
| |
| int index; |
| for (int i = 0; i < size; i++) { |
| String encodedName = (String)namesIndex.elementAt(i); |
| if ((index = encodedName.lastIndexOf(':')) > -1) { |
| urisArray[i] = encodedName.substring(0, index); |
| } |
| |
| index = index + 1; |
| if (encodedName.charAt(index) == '@') { |
| typesArray[i] = DTM.ATTRIBUTE_NODE; |
| index++; |
| } else if (encodedName.charAt(index) == '?') { |
| typesArray[i] = DTM.NAMESPACE_NODE; |
| index++; |
| } else { |
| typesArray[i] = DTM.ELEMENT_NODE; |
| } |
| |
| if (index == 0) { |
| namesArray[i] = encodedName; |
| } |
| else { |
| namesArray[i] = encodedName.substring(index); |
| } |
| } |
| |
| staticConst.markChunkStart(); |
| il.append(new PUSH(cpg, size)); |
| il.append(new ANEWARRAY(cpg.addClass(STRING))); |
| int namesArrayRef = cpg.addFieldref(_className, |
| STATIC_NAMES_ARRAY_FIELD, |
| NAMES_INDEX_SIG); |
| il.append(new PUTSTATIC(namesArrayRef)); |
| staticConst.markChunkEnd(); |
| |
| for (int i = 0; i < size; i++) { |
| final String name = namesArray[i]; |
| staticConst.markChunkStart(); |
| il.append(new GETSTATIC(namesArrayRef)); |
| il.append(new PUSH(cpg, i)); |
| il.append(new PUSH(cpg, name)); |
| il.append(AASTORE); |
| staticConst.markChunkEnd(); |
| } |
| |
| staticConst.markChunkStart(); |
| il.append(new PUSH(cpg, size)); |
| il.append(new ANEWARRAY(cpg.addClass(STRING))); |
| int urisArrayRef = cpg.addFieldref(_className, |
| STATIC_URIS_ARRAY_FIELD, |
| URIS_INDEX_SIG); |
| il.append(new PUTSTATIC(urisArrayRef)); |
| staticConst.markChunkEnd(); |
| |
| for (int i = 0; i < size; i++) { |
| final String uri = urisArray[i]; |
| staticConst.markChunkStart(); |
| il.append(new GETSTATIC(urisArrayRef)); |
| il.append(new PUSH(cpg, i)); |
| il.append(new PUSH(cpg, uri)); |
| il.append(AASTORE); |
| staticConst.markChunkEnd(); |
| } |
| |
| staticConst.markChunkStart(); |
| il.append(new PUSH(cpg, size)); |
| il.append(new NEWARRAY(BasicType.INT)); |
| int typesArrayRef = cpg.addFieldref(_className, |
| STATIC_TYPES_ARRAY_FIELD, |
| TYPES_INDEX_SIG); |
| il.append(new PUTSTATIC(typesArrayRef)); |
| staticConst.markChunkEnd(); |
| |
| for (int i = 0; i < size; i++) { |
| final int nodeType = typesArray[i]; |
| staticConst.markChunkStart(); |
| il.append(new GETSTATIC(typesArrayRef)); |
| il.append(new PUSH(cpg, i)); |
| il.append(new PUSH(cpg, nodeType)); |
| il.append(IASTORE); |
| } |
| |
| // Put the namespace names array into the translet |
| final Vector namespaces = getXSLTC().getNamespaceIndex(); |
| staticConst.markChunkStart(); |
| il.append(new PUSH(cpg, namespaces.size())); |
| il.append(new ANEWARRAY(cpg.addClass(STRING))); |
| int namespaceArrayRef = cpg.addFieldref(_className, |
| STATIC_NAMESPACE_ARRAY_FIELD, |
| NAMESPACE_INDEX_SIG); |
| il.append(new PUTSTATIC(namespaceArrayRef)); |
| staticConst.markChunkEnd(); |
| |
| for (int i = 0; i < namespaces.size(); i++) { |
| final String ns = (String)namespaces.elementAt(i); |
| staticConst.markChunkStart(); |
| il.append(new GETSTATIC(namespaceArrayRef)); |
| il.append(new PUSH(cpg, i)); |
| il.append(new PUSH(cpg, ns)); |
| il.append(AASTORE); |
| staticConst.markChunkEnd(); |
| } |
| |
| // Grab all the literal text in the stylesheet and put it in a char[] |
| final int charDataCount = getXSLTC().getCharacterDataCount(); |
| final int toCharArray = cpg.addMethodref(STRING, "toCharArray", "()[C"); |
| for (int i = 0; i < charDataCount; i++) { |
| staticConst.markChunkStart(); |
| il.append(new PUSH(cpg, getXSLTC().getCharacterData(i))); |
| il.append(new INVOKEVIRTUAL(toCharArray)); |
| il.append(new PUTSTATIC(cpg.addFieldref(_className, |
| STATIC_CHAR_DATA_FIELD+i, |
| STATIC_CHAR_DATA_FIELD_SIG))); |
| staticConst.markChunkEnd(); |
| } |
| |
| il.append(RETURN); |
| |
| classGen.addMethod(staticConst); |
| |
| } |
| |
| /** |
| * Compile the translet's constructor |
| */ |
| private void compileConstructor(ClassGenerator classGen, Output output) { |
| |
| final ConstantPoolGen cpg = classGen.getConstantPool(); |
| final InstructionList il = new InstructionList(); |
| |
| final MethodGenerator constructor = |
| new MethodGenerator(ACC_PUBLIC, |
| com.sun.org.apache.bcel.internal.generic.Type.VOID, |
| null, null, "<init>", |
| _className, il, cpg); |
| |
| // Call the constructor in the AbstractTranslet superclass |
| il.append(classGen.loadTranslet()); |
| il.append(new INVOKESPECIAL(cpg.addMethodref(TRANSLET_CLASS, |
| "<init>", "()V"))); |
| |
| constructor.markChunkStart(); |
| il.append(classGen.loadTranslet()); |
| il.append(new GETSTATIC(cpg.addFieldref(_className, |
| STATIC_NAMES_ARRAY_FIELD, |
| NAMES_INDEX_SIG))); |
| il.append(new PUTFIELD(cpg.addFieldref(TRANSLET_CLASS, |
| NAMES_INDEX, |
| NAMES_INDEX_SIG))); |
| |
| il.append(classGen.loadTranslet()); |
| il.append(new GETSTATIC(cpg.addFieldref(_className, |
| STATIC_URIS_ARRAY_FIELD, |
| URIS_INDEX_SIG))); |
| il.append(new PUTFIELD(cpg.addFieldref(TRANSLET_CLASS, |
| URIS_INDEX, |
| URIS_INDEX_SIG))); |
| constructor.markChunkEnd(); |
| |
| constructor.markChunkStart(); |
| il.append(classGen.loadTranslet()); |
| il.append(new GETSTATIC(cpg.addFieldref(_className, |
| STATIC_TYPES_ARRAY_FIELD, |
| TYPES_INDEX_SIG))); |
| il.append(new PUTFIELD(cpg.addFieldref(TRANSLET_CLASS, |
| TYPES_INDEX, |
| TYPES_INDEX_SIG))); |
| constructor.markChunkEnd(); |
| |
| constructor.markChunkStart(); |
| il.append(classGen.loadTranslet()); |
| il.append(new GETSTATIC(cpg.addFieldref(_className, |
| STATIC_NAMESPACE_ARRAY_FIELD, |
| NAMESPACE_INDEX_SIG))); |
| il.append(new PUTFIELD(cpg.addFieldref(TRANSLET_CLASS, |
| NAMESPACE_INDEX, |
| NAMESPACE_INDEX_SIG))); |
| constructor.markChunkEnd(); |
| |
| constructor.markChunkStart(); |
| il.append(classGen.loadTranslet()); |
| il.append(new PUSH(cpg, AbstractTranslet.CURRENT_TRANSLET_VERSION)); |
| il.append(new PUTFIELD(cpg.addFieldref(TRANSLET_CLASS, |
| TRANSLET_VERSION_INDEX, |
| TRANSLET_VERSION_INDEX_SIG))); |
| constructor.markChunkEnd(); |
| |
| if (_hasIdCall) { |
| constructor.markChunkStart(); |
| il.append(classGen.loadTranslet()); |
| il.append(new PUSH(cpg, Boolean.TRUE)); |
| il.append(new PUTFIELD(cpg.addFieldref(TRANSLET_CLASS, |
| HASIDCALL_INDEX, |
| HASIDCALL_INDEX_SIG))); |
| constructor.markChunkEnd(); |
| } |
| |
| // Compile in code to set the output configuration from <xsl:output> |
| if (output != null) { |
| // Set all the output settings files in the translet |
| constructor.markChunkStart(); |
| output.translate(classGen, constructor); |
| constructor.markChunkEnd(); |
| } |
| |
| // Compile default decimal formatting symbols. |
| // This is an implicit, nameless xsl:decimal-format top-level element. |
| if (_numberFormattingUsed) { |
| constructor.markChunkStart(); |
| DecimalFormatting.translateDefaultDFS(classGen, constructor); |
| constructor.markChunkEnd(); |
| } |
| |
| il.append(RETURN); |
| |
| classGen.addMethod(constructor); |
| } |
| |
| /** |
| * Compile a topLevel() method into the output class. This method is |
| * called from transform() to handle all non-template top-level elements. |
| * Returns the signature of the topLevel() method. |
| * |
| * Global variables/params and keys are first sorted to resolve |
| * dependencies between them. The XSLT 1.0 spec does not allow a key |
| * to depend on a variable. However, for compatibility with Xalan |
| * interpretive, that type of dependency is allowed. Note also that |
| * the buildKeys() method is still generated as it is used by the |
| * LoadDocument class, but it no longer called from transform(). |
| */ |
| private String compileTopLevel(ClassGenerator classGen) { |
| |
| final ConstantPoolGen cpg = classGen.getConstantPool(); |
| |
| final com.sun.org.apache.bcel.internal.generic.Type[] argTypes = { |
| Util.getJCRefType(DOM_INTF_SIG), |
| Util.getJCRefType(NODE_ITERATOR_SIG), |
| Util.getJCRefType(TRANSLET_OUTPUT_SIG) |
| }; |
| |
| final String[] argNames = { |
| DOCUMENT_PNAME, ITERATOR_PNAME, TRANSLET_OUTPUT_PNAME |
| }; |
| |
| final InstructionList il = new InstructionList(); |
| |
| final MethodGenerator toplevel = |
| new MethodGenerator(ACC_PUBLIC, |
| com.sun.org.apache.bcel.internal.generic.Type.VOID, |
| argTypes, argNames, |
| "topLevel", _className, il, |
| classGen.getConstantPool()); |
| |
| toplevel.addException("com.sun.org.apache.xalan.internal.xsltc.TransletException"); |
| |
| // Define and initialize 'current' variable with the root node |
| final LocalVariableGen current = |
| toplevel.addLocalVariable("current", |
| com.sun.org.apache.bcel.internal.generic.Type.INT, |
| null, null); |
| |
| final int setFilter = cpg.addInterfaceMethodref(DOM_INTF, |
| "setFilter", |
| "(Lcom/sun/org/apache/xalan/internal/xsltc/StripFilter;)V"); |
| |
| final int gitr = cpg.addInterfaceMethodref(DOM_INTF, |
| "getIterator", |
| "()"+NODE_ITERATOR_SIG); |
| il.append(toplevel.loadDOM()); |
| il.append(new INVOKEINTERFACE(gitr, 1)); |
| il.append(toplevel.nextNode()); |
| current.setStart(il.append(new ISTORE(current.getIndex()))); |
| |
| // Create a new list containing variables/params + keys |
| Vector varDepElements = new Vector(_globals); |
| Iterator<SyntaxTreeNode> elements = elements(); |
| while (elements.hasNext()) { |
| SyntaxTreeNode element = elements.next(); |
| if (element instanceof Key) { |
| varDepElements.add(element); |
| } |
| } |
| |
| // Determine a partial order for the variables/params and keys |
| varDepElements = resolveDependencies(varDepElements); |
| |
| // Translate vars/params and keys in the right order |
| final int count = varDepElements.size(); |
| for (int i = 0; i < count; i++) { |
| final TopLevelElement tle = (TopLevelElement) varDepElements.elementAt(i); |
| tle.translate(classGen, toplevel); |
| if (tle instanceof Key) { |
| final Key key = (Key) tle; |
| _keys.put(key.getName(), key); |
| } |
| } |
| |
| // Compile code for other top-level elements |
| Vector whitespaceRules = new Vector(); |
| elements = elements(); |
| while (elements.hasNext()) { |
| SyntaxTreeNode element = elements.next(); |
| // xsl:decimal-format |
| if (element instanceof DecimalFormatting) { |
| ((DecimalFormatting)element).translate(classGen,toplevel); |
| } |
| // xsl:strip/preserve-space |
| else if (element instanceof Whitespace) { |
| whitespaceRules.addAll(((Whitespace)element).getRules()); |
| } |
| } |
| |
| // Translate all whitespace strip/preserve rules |
| if (whitespaceRules.size() > 0) { |
| Whitespace.translateRules(whitespaceRules,classGen); |
| } |
| |
| if (classGen.containsMethod(STRIP_SPACE, STRIP_SPACE_PARAMS) != null) { |
| il.append(toplevel.loadDOM()); |
| il.append(classGen.loadTranslet()); |
| il.append(new INVOKEINTERFACE(setFilter, 2)); |
| } |
| |
| il.append(RETURN); |
| |
| // Compute max locals + stack and add method to class |
| classGen.addMethod(toplevel); |
| |
| return("("+DOM_INTF_SIG+NODE_ITERATOR_SIG+TRANSLET_OUTPUT_SIG+")V"); |
| } |
| |
| /** |
| * This method returns a vector with variables/params and keys in the |
| * order in which they are to be compiled for initialization. The order |
| * is determined by analyzing the dependencies between them. The XSLT 1.0 |
| * spec does not allow a key to depend on a variable. However, for |
| * compatibility with Xalan interpretive, that type of dependency is |
| * allowed and, therefore, consider to determine the partial order. |
| */ |
| private Vector resolveDependencies(Vector input) { |
| /* DEBUG CODE - INGORE |
| for (int i = 0; i < input.size(); i++) { |
| final TopLevelElement e = (TopLevelElement) input.elementAt(i); |
| System.out.println("e = " + e + " depends on:"); |
| Vector dep = e.getDependencies(); |
| for (int j = 0; j < (dep != null ? dep.size() : 0); j++) { |
| System.out.println("\t" + dep.elementAt(j)); |
| } |
| } |
| System.out.println("================================="); |
| */ |
| |
| Vector result = new Vector(); |
| while (input.size() > 0) { |
| boolean changed = false; |
| for (int i = 0; i < input.size(); ) { |
| final TopLevelElement vde = (TopLevelElement) input.elementAt(i); |
| final Vector dep = vde.getDependencies(); |
| if (dep == null || result.containsAll(dep)) { |
| result.addElement(vde); |
| input.remove(i); |
| changed = true; |
| } |
| else { |
| i++; |
| } |
| } |
| |
| // If nothing was changed in this pass then we have a circular ref |
| if (!changed) { |
| ErrorMsg err = new ErrorMsg(ErrorMsg.CIRCULAR_VARIABLE_ERR, |
| input.toString(), this); |
| getParser().reportError(Constants.ERROR, err); |
| return(result); |
| } |
| } |
| |
| /* DEBUG CODE - INGORE |
| System.out.println("================================="); |
| for (int i = 0; i < result.size(); i++) { |
| final TopLevelElement e = (TopLevelElement) result.elementAt(i); |
| System.out.println("e = " + e); |
| } |
| */ |
| |
| return result; |
| } |
| |
| /** |
| * Compile a buildKeys() method into the output class. Note that keys |
| * for the input document are created in topLevel(), not in this method. |
| * However, we still need this method to create keys for documents loaded |
| * via the XPath document() function. |
| */ |
| private String compileBuildKeys(ClassGenerator classGen) { |
| final ConstantPoolGen cpg = classGen.getConstantPool(); |
| |
| final com.sun.org.apache.bcel.internal.generic.Type[] argTypes = { |
| Util.getJCRefType(DOM_INTF_SIG), |
| Util.getJCRefType(NODE_ITERATOR_SIG), |
| Util.getJCRefType(TRANSLET_OUTPUT_SIG), |
| com.sun.org.apache.bcel.internal.generic.Type.INT |
| }; |
| |
| final String[] argNames = { |
| DOCUMENT_PNAME, ITERATOR_PNAME, TRANSLET_OUTPUT_PNAME, "current" |
| }; |
| |
| final InstructionList il = new InstructionList(); |
| |
| final MethodGenerator buildKeys = |
| new MethodGenerator(ACC_PUBLIC, |
| com.sun.org.apache.bcel.internal.generic.Type.VOID, |
| argTypes, argNames, |
| "buildKeys", _className, il, |
| classGen.getConstantPool()); |
| |
| buildKeys.addException("com.sun.org.apache.xalan.internal.xsltc.TransletException"); |
| |
| final Iterator<SyntaxTreeNode> elements = elements(); |
| while (elements.hasNext()) { |
| // xsl:key |
| final SyntaxTreeNode element = elements.next(); |
| if (element instanceof Key) { |
| final Key key = (Key)element; |
| key.translate(classGen, buildKeys); |
| _keys.put(key.getName(),key); |
| } |
| } |
| |
| il.append(RETURN); |
| |
| // Compute max locals + stack and add method to class |
| buildKeys.stripAttributes(true); |
| buildKeys.setMaxLocals(); |
| buildKeys.setMaxStack(); |
| buildKeys.removeNOPs(); |
| |
| classGen.addMethod(buildKeys.getMethod()); |
| |
| return("("+DOM_INTF_SIG+NODE_ITERATOR_SIG+TRANSLET_OUTPUT_SIG+"I)V"); |
| } |
| |
| /** |
| * Compile transform() into the output class. This method is used to |
| * initialize global variables and global parameters. The current node |
| * is set to be the document's root node. |
| */ |
| private void compileTransform(ClassGenerator classGen) { |
| final ConstantPoolGen cpg = classGen.getConstantPool(); |
| |
| /* |
| * Define the the method transform with the following signature: |
| * void transform(DOM, NodeIterator, HandlerBase) |
| */ |
| final com.sun.org.apache.bcel.internal.generic.Type[] argTypes = |
| new com.sun.org.apache.bcel.internal.generic.Type[3]; |
| argTypes[0] = Util.getJCRefType(DOM_INTF_SIG); |
| argTypes[1] = Util.getJCRefType(NODE_ITERATOR_SIG); |
| argTypes[2] = Util.getJCRefType(TRANSLET_OUTPUT_SIG); |
| |
| final String[] argNames = new String[3]; |
| argNames[0] = DOCUMENT_PNAME; |
| argNames[1] = ITERATOR_PNAME; |
| argNames[2] = TRANSLET_OUTPUT_PNAME; |
| |
| final InstructionList il = new InstructionList(); |
| final MethodGenerator transf = |
| new MethodGenerator(ACC_PUBLIC, |
| com.sun.org.apache.bcel.internal.generic.Type.VOID, |
| argTypes, argNames, |
| "transform", |
| _className, |
| il, |
| classGen.getConstantPool()); |
| transf.addException("com.sun.org.apache.xalan.internal.xsltc.TransletException"); |
| |
| // Define and initialize current with the root node |
| final LocalVariableGen current = |
| transf.addLocalVariable("current", |
| com.sun.org.apache.bcel.internal.generic.Type.INT, |
| null, null); |
| final String applyTemplatesSig = classGen.getApplyTemplatesSig(); |
| final int applyTemplates = cpg.addMethodref(getClassName(), |
| "applyTemplates", |
| applyTemplatesSig); |
| final int domField = cpg.addFieldref(getClassName(), |
| DOM_FIELD, |
| DOM_INTF_SIG); |
| |
| // push translet for PUTFIELD |
| il.append(classGen.loadTranslet()); |
| // prepare appropriate DOM implementation |
| |
| if (isMultiDocument()) { |
| il.append(new NEW(cpg.addClass(MULTI_DOM_CLASS))); |
| il.append(DUP); |
| } |
| |
| il.append(classGen.loadTranslet()); |
| il.append(transf.loadDOM()); |
| il.append(new INVOKEVIRTUAL(cpg.addMethodref(TRANSLET_CLASS, |
| "makeDOMAdapter", |
| "("+DOM_INTF_SIG+")"+ |
| DOM_ADAPTER_SIG))); |
| // DOMAdapter is on the stack |
| |
| if (isMultiDocument()) { |
| final int init = cpg.addMethodref(MULTI_DOM_CLASS, |
| "<init>", |
| "("+DOM_INTF_SIG+")V"); |
| il.append(new INVOKESPECIAL(init)); |
| // MultiDOM is on the stack |
| } |
| |
| //store to _dom variable |
| il.append(new PUTFIELD(domField)); |
| |
| // continue with globals initialization |
| final int gitr = cpg.addInterfaceMethodref(DOM_INTF, |
| "getIterator", |
| "()"+NODE_ITERATOR_SIG); |
| il.append(transf.loadDOM()); |
| il.append(new INVOKEINTERFACE(gitr, 1)); |
| il.append(transf.nextNode()); |
| current.setStart(il.append(new ISTORE(current.getIndex()))); |
| |
| // Transfer the output settings to the output post-processor |
| il.append(classGen.loadTranslet()); |
| il.append(transf.loadHandler()); |
| final int index = cpg.addMethodref(TRANSLET_CLASS, |
| "transferOutputSettings", |
| "("+OUTPUT_HANDLER_SIG+")V"); |
| il.append(new INVOKEVIRTUAL(index)); |
| |
| /* |
| * Compile buildKeys() method. Note that this method is not |
| * invoked here as keys for the input document are now created |
| * in topLevel(). However, this method is still needed by the |
| * LoadDocument class. |
| */ |
| final String keySig = compileBuildKeys(classGen); |
| final int keyIdx = cpg.addMethodref(getClassName(), |
| "buildKeys", keySig); |
| |
| // Look for top-level elements that need handling |
| final Iterator<SyntaxTreeNode> toplevel = elements(); |
| if (_globals.size() > 0 || toplevel.hasNext()) { |
| // Compile method for handling top-level elements |
| final String topLevelSig = compileTopLevel(classGen); |
| // Get a reference to that method |
| final int topLevelIdx = cpg.addMethodref(getClassName(), |
| "topLevel", |
| topLevelSig); |
| // Push all parameters on the stack and call topLevel() |
| il.append(classGen.loadTranslet()); // The 'this' pointer |
| il.append(classGen.loadTranslet()); |
| il.append(new GETFIELD(domField)); // The DOM reference |
| il.append(transf.loadIterator()); |
| il.append(transf.loadHandler()); // The output handler |
| il.append(new INVOKEVIRTUAL(topLevelIdx)); |
| } |
| |
| // start document |
| il.append(transf.loadHandler()); |
| il.append(transf.startDocument()); |
| |
| // push first arg for applyTemplates |
| il.append(classGen.loadTranslet()); |
| // push translet for GETFIELD to get DOM arg |
| il.append(classGen.loadTranslet()); |
| il.append(new GETFIELD(domField)); |
| // push remaining 2 args |
| il.append(transf.loadIterator()); |
| il.append(transf.loadHandler()); |
| il.append(new INVOKEVIRTUAL(applyTemplates)); |
| // endDocument |
| il.append(transf.loadHandler()); |
| il.append(transf.endDocument()); |
| |
| il.append(RETURN); |
| |
| // Compute max locals + stack and add method to class |
| classGen.addMethod(transf); |
| |
| } |
| |
| /** |
| * Peephole optimization: Remove sequences of [ALOAD, POP]. |
| */ |
| private void peepHoleOptimization(MethodGenerator methodGen) { |
| final String pattern = "`aload'`pop'`instruction'"; |
| final InstructionList il = methodGen.getInstructionList(); |
| final InstructionFinder find = new InstructionFinder(il); |
| for(Iterator iter=find.search(pattern); iter.hasNext(); ) { |
| InstructionHandle[] match = (InstructionHandle[])iter.next(); |
| try { |
| il.delete(match[0], match[1]); |
| } |
| catch (TargetLostException e) { |
| // TODO: move target down into the list |
| } |
| } |
| } |
| |
| public int addParam(Param param) { |
| _globals.addElement(param); |
| return _globals.size() - 1; |
| } |
| |
| public int addVariable(Variable global) { |
| _globals.addElement(global); |
| return _globals.size() - 1; |
| } |
| |
| public void display(int indent) { |
| indent(indent); |
| Util.println("Stylesheet"); |
| displayContents(indent + IndentIncrement); |
| } |
| |
| // do we need this wrapper ????? |
| public String getNamespace(String prefix) { |
| return lookupNamespace(prefix); |
| } |
| |
| public String getClassName() { |
| return _className; |
| } |
| |
| public Vector getTemplates() { |
| return _templates; |
| } |
| |
| public Vector getAllValidTemplates() { |
| // Return templates if no imported/included stylesheets |
| if (_includedStylesheets == null) { |
| return _templates; |
| } |
| |
| // Is returned value cached? |
| if (_allValidTemplates == null) { |
| Vector templates = new Vector(); |
| templates.addAll(_templates); |
| int size = _includedStylesheets.size(); |
| for (int i = 0; i < size; i++) { |
| Stylesheet included =(Stylesheet)_includedStylesheets.elementAt(i); |
| templates.addAll(included.getAllValidTemplates()); |
| } |
| //templates.addAll(_templates); |
| |
| // Cache results in top-level stylesheet only |
| if (_parentStylesheet != null) { |
| return templates; |
| } |
| _allValidTemplates = templates; |
| } |
| |
| return _allValidTemplates; |
| } |
| |
| protected void addTemplate(Template template) { |
| _templates.addElement(template); |
| } |
| } |
