| /* |
| * Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| package sun.jvm.hotspot.oops; |
| |
| import java.io.*; |
| |
| import sun.jvm.hotspot.runtime.*; |
| import sun.jvm.hotspot.utilities.*; |
| |
| // Super class for all fields in an object |
| public class Field { |
| |
| Field(FieldIdentifier id, long offset, boolean isVMField) { |
| this.offset = offset; |
| this.id = id; |
| this.isVMField = isVMField; |
| } |
| |
| /** Constructor for fields that are named in an InstanceKlass's |
| fields array (i.e., named, non-VM fields) */ |
| Field(InstanceKlass holder, int fieldIndex) { |
| this.holder = holder; |
| this.fieldIndex = fieldIndex; |
| |
| offset = holder.getFieldOffset(fieldIndex); |
| genericSignature = holder.getFieldGenericSignature(fieldIndex); |
| |
| Symbol name = holder.getFieldName(fieldIndex); |
| id = new NamedFieldIdentifier(name.asString()); |
| |
| signature = holder.getFieldSignature(fieldIndex); |
| fieldType = new FieldType(signature); |
| |
| short access = holder.getFieldAccessFlags(fieldIndex); |
| accessFlags = new AccessFlags(access); |
| } |
| |
| private long offset; |
| private FieldIdentifier id; |
| private boolean isVMField; |
| // Java fields only |
| private InstanceKlass holder; |
| private FieldType fieldType; |
| private Symbol signature; |
| private Symbol genericSignature; |
| private AccessFlags accessFlags; |
| private int fieldIndex; |
| |
| /** Returns the byte offset of the field within the object or klass */ |
| public long getOffset() { return offset; } |
| |
| /** Returns the identifier of the field */ |
| public FieldIdentifier getID() { return id; } |
| |
| /** Indicates whether this is a VM field */ |
| public boolean isVMField() { return isVMField; } |
| |
| /** Indicates whether this is a named field */ |
| public boolean isNamedField() { return (id instanceof NamedFieldIdentifier); } |
| |
| public void printOn(PrintStream tty) { |
| getID().printOn(tty); |
| tty.print(" {" + getOffset() + "} :"); |
| } |
| |
| /** (Named, non-VM fields only) Returns the InstanceKlass containing |
| this (static or non-static) field. */ |
| public InstanceKlass getFieldHolder() { |
| return holder; |
| } |
| |
| /** (Named, non-VM fields only) Returns the index in the fields |
| TypeArray for this field. Equivalent to the "index" in the VM's |
| fieldDescriptors. */ |
| public int getFieldIndex() { |
| return fieldIndex; |
| } |
| |
| /** (Named, non-VM fields only) Retrieves the access flags. */ |
| public long getAccessFlags() { return accessFlags.getValue(); } |
| public AccessFlags getAccessFlagsObj() { return accessFlags; } |
| |
| /** (Named, non-VM fields only) Returns the type of this field. */ |
| public FieldType getFieldType() { return fieldType; } |
| |
| /** (Named, non-VM fields only) Returns the signature of this |
| field. */ |
| public Symbol getSignature() { return signature; } |
| public Symbol getGenericSignature() { return genericSignature; } |
| |
| public boolean hasInitialValue() { return holder.getFieldInitialValueIndex(fieldIndex) != 0; } |
| |
| // |
| // Following acccessors are for named, non-VM fields only |
| // |
| public boolean isPublic() { return accessFlags.isPublic(); } |
| public boolean isPrivate() { return accessFlags.isPrivate(); } |
| public boolean isProtected() { return accessFlags.isProtected(); } |
| public boolean isPackagePrivate() { return !isPublic() && !isPrivate() && !isProtected(); } |
| |
| public boolean isStatic() { return accessFlags.isStatic(); } |
| public boolean isFinal() { return accessFlags.isFinal(); } |
| public boolean isVolatile() { return accessFlags.isVolatile(); } |
| public boolean isTransient() { return accessFlags.isTransient(); } |
| |
| public boolean isSynthetic() { return accessFlags.isSynthetic(); } |
| public boolean isEnumConstant() { return accessFlags.isEnum(); } |
| |
| public boolean equals(Object obj) { |
| if (obj == null) { |
| return false; |
| } |
| |
| if (! (obj instanceof Field)) { |
| return false; |
| } |
| |
| Field other = (Field) obj; |
| return this.getFieldHolder().equals(other.getFieldHolder()) && |
| this.getID().equals(other.getID()); |
| } |
| |
| public int hashCode() { |
| return getFieldHolder().hashCode() ^ getID().hashCode(); |
| } |
| } |