| /* |
| * reserved comment block |
| * DO NOT REMOVE OR ALTER! |
| */ |
| package com.sun.org.apache.bcel.internal.classfile; |
| |
| /* ==================================================================== |
| * The Apache Software License, Version 1.1 |
| * |
| * Copyright (c) 2001 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, |
| * if any, must include the following acknowledgment: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowledgment may appear in the software itself, |
| * if and wherever such third-party acknowledgments normally appear. |
| * |
| * 4. The names "Apache" and "Apache Software Foundation" and |
| * "Apache BCEL" must not be used to endorse or promote products |
| * derived from this software without prior written permission. For |
| * written permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache", |
| * "Apache BCEL", nor may "Apache" appear in their name, without |
| * prior written permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| */ |
| |
| import com.sun.org.apache.bcel.internal.Constants; |
| import java.io.*; |
| |
| /** |
| * This class is derived from <em>Attribute</em> and represents a reference |
| * to a <href="http://wwwipd.ira.uka.de/~pizza/gj/">GJ</a> attribute. |
| * |
| * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A> |
| * @see Attribute |
| */ |
| public final class Signature extends Attribute { |
| private int signature_index; |
| |
| /** |
| * Initialize from another object. Note that both objects use the same |
| * references (shallow copy). Use clone() for a physical copy. |
| */ |
| public Signature(Signature c) { |
| this(c.getNameIndex(), c.getLength(), c.getSignatureIndex(), c.getConstantPool()); |
| } |
| |
| /** |
| * Construct object from file stream. |
| * @param name_index Index in constant pool to CONSTANT_Utf8 |
| * @param length Content length in bytes |
| * @param file Input stream |
| * @param constant_pool Array of constants |
| * @throws IOException |
| */ |
| Signature(int name_index, int length, DataInputStream file, |
| ConstantPool constant_pool) throws IOException |
| { |
| this(name_index, length, file.readUnsignedShort(), constant_pool); |
| } |
| |
| /** |
| * @param name_index Index in constant pool to CONSTANT_Utf8 |
| * @param length Content length in bytes |
| * @param constant_pool Array of constants |
| * @param Signature_index Index in constant pool to CONSTANT_Utf8 |
| */ |
| public Signature(int name_index, int length, int signature_index, |
| ConstantPool constant_pool) |
| { |
| super(Constants.ATTR_SIGNATURE, name_index, length, constant_pool); |
| this.signature_index = signature_index; |
| } |
| |
| /** |
| * Called by objects that are traversing the nodes of the tree implicitely |
| * defined by the contents of a Java class. I.e., the hierarchy of methods, |
| * fields, attributes, etc. spawns a tree of objects. |
| * |
| * @param v Visitor object |
| */ |
| public void accept(Visitor v) { |
| System.err.println("Visiting non-standard Signature object"); |
| v.visitSignature(this); |
| } |
| |
| /** |
| * Dump source file attribute to file stream in binary format. |
| * |
| * @param file Output file stream |
| * @throws IOException |
| */ |
| public final void dump(DataOutputStream file) throws IOException |
| { |
| super.dump(file); |
| file.writeShort(signature_index); |
| } |
| |
| /** |
| * @return Index in constant pool of source file name. |
| */ |
| public final int getSignatureIndex() { return signature_index; } |
| |
| /** |
| * @param Signature_index. |
| */ |
| public final void setSignatureIndex(int signature_index) { |
| this.signature_index = signature_index; |
| } |
| |
| /** |
| * @return GJ signature. |
| */ |
| public final String getSignature() { |
| ConstantUtf8 c = (ConstantUtf8)constant_pool.getConstant(signature_index, |
| Constants.CONSTANT_Utf8); |
| return c.getBytes(); |
| } |
| |
| /** |
| * Extends ByteArrayInputStream to make 'unreading' chars possible. |
| */ |
| private static final class MyByteArrayInputStream extends ByteArrayInputStream { |
| MyByteArrayInputStream(String data) { super(data.getBytes()); } |
| final int mark() { return pos; } |
| final String getData() { return new String(buf); } |
| final void reset(int p) { pos = p; } |
| final void unread() { if(pos > 0) pos--; } |
| } |
| |
| private static boolean identStart(int ch) { |
| return ch == 'T' || ch == 'L'; |
| } |
| |
| private static boolean identPart(int ch) { |
| return ch == '/' || ch == ';'; |
| } |
| |
| private static final void matchIdent(MyByteArrayInputStream in, StringBuffer buf) { |
| int ch; |
| |
| if((ch = in.read()) == -1) |
| throw new RuntimeException("Illegal signature: " + in.getData() + |
| " no ident, reaching EOF"); |
| |
| //System.out.println("return from ident:" + (char)ch); |
| |
| if(!identStart(ch)) { |
| StringBuffer buf2 = new StringBuffer(); |
| |
| int count = 1; |
| while(Character.isJavaIdentifierPart((char)ch)) { |
| buf2.append((char)ch); |
| count++; |
| ch = in.read(); |
| } |
| |
| if(ch == ':') { // Ok, formal parameter |
| in.skip("Ljava/lang/Object".length()); |
| buf.append(buf2); |
| |
| ch = in.read(); |
| in.unread(); |
| //System.out.println("so far:" + buf2 + ":next:" +(char)ch); |
| } else { |
| for(int i=0; i < count; i++) |
| in.unread(); |
| } |
| |
| return; |
| } |
| |
| StringBuffer buf2 = new StringBuffer(); |
| ch = in.read(); |
| |
| do { |
| buf2.append((char)ch); |
| ch = in.read(); |
| //System.out.println("within ident:"+ (char)ch); |
| |
| } while((ch != -1) && (Character.isJavaIdentifierPart((char)ch) || (ch == '/'))); |
| |
| buf.append(buf2.toString().replace('/', '.')); |
| |
| //System.out.println("regular return ident:"+ (char)ch + ":" + buf2); |
| |
| if(ch != -1) |
| in.unread(); |
| } |
| |
| private static final void matchGJIdent(MyByteArrayInputStream in, |
| StringBuffer buf) |
| { |
| int ch; |
| |
| matchIdent(in, buf); |
| |
| ch = in.read(); |
| if((ch == '<') || ch == '(') { // Parameterized or method |
| //System.out.println("Enter <"); |
| buf.append((char)ch); |
| matchGJIdent(in, buf); |
| |
| while(((ch = in.read()) != '>') && (ch != ')')) { // List of parameters |
| if(ch == -1) |
| throw new RuntimeException("Illegal signature: " + in.getData() + |
| " reaching EOF"); |
| |
| //System.out.println("Still no >"); |
| buf.append(", "); |
| in.unread(); |
| matchGJIdent(in, buf); // Recursive call |
| } |
| |
| //System.out.println("Exit >"); |
| |
| buf.append((char)ch); |
| } else |
| in.unread(); |
| |
| ch = in.read(); |
| if(identStart(ch)) { |
| in.unread(); |
| matchGJIdent(in, buf); |
| } else if(ch == ')') { |
| in.unread(); |
| return; |
| } else if(ch != ';') |
| throw new RuntimeException("Illegal signature: " + in.getData() + " read " + |
| (char)ch); |
| } |
| |
| public static String translate(String s) { |
| //System.out.println("Sig:" + s); |
| StringBuffer buf = new StringBuffer(); |
| |
| matchGJIdent(new MyByteArrayInputStream(s), buf); |
| |
| return buf.toString(); |
| } |
| |
| public static final boolean isFormalParameterList(String s) { |
| return s.startsWith("<") && (s.indexOf(':') > 0); |
| } |
| |
| public static final boolean isActualParameterList(String s) { |
| return s.startsWith("L") && s.endsWith(">;"); |
| } |
| |
| /** |
| * @return String representation |
| */ |
| public final String toString() { |
| String s = getSignature(); |
| |
| return "Signature(" + s + ")"; |
| } |
| |
| /** |
| * @return deep copy of this attribute |
| */ |
| public Attribute copy(ConstantPool constant_pool) { |
| return (Signature)clone(); |
| } |
| } |