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package org.aspectj.apache.bcel.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 java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.aspectj.apache.bcel.Constants;
import org.aspectj.apache.bcel.classfile.annotation.AnnotationGen;
import org.aspectj.apache.bcel.classfile.annotation.RuntimeAnnos;
/**
* Abstract super class for fields and methods.
*
* @version $Id: FieldOrMethod.java,v 1.12 2009/09/15 19:40:12 aclement Exp $
* @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
*/
public abstract class FieldOrMethod extends Modifiers implements Node {
protected int nameIndex;
protected int signatureIndex;
protected Attribute[] attributes;
protected ConstantPool cpool;
private String name; // lazily initialized
private String signature; // lazily initialized
private AnnotationGen[] annotations; // lazily initialized
private String signatureAttributeString = null;
private boolean searchedForSignatureAttribute = false;
protected FieldOrMethod() {
}
/**
* Initialize from another object. Note that both objects use the same references (shallow copy). Use clone() for a physical
* copy.
*/
protected FieldOrMethod(FieldOrMethod c) {
this(c.getModifiers(), c.getNameIndex(), c.getSignatureIndex(), c.getAttributes(), c.getConstantPool());
}
protected FieldOrMethod(DataInputStream file, ConstantPool cpool) throws IOException {
this(file.readUnsignedShort(), file.readUnsignedShort(), file.readUnsignedShort(), null, cpool);
attributes = AttributeUtils.readAttributes(file, cpool);
}
protected FieldOrMethod(int accessFlags, int nameIndex, int signatureIndex, Attribute[] attributes, ConstantPool cpool) {
this.modifiers = accessFlags;
this.nameIndex = nameIndex;
this.signatureIndex = signatureIndex;
this.cpool = cpool;
this.attributes = attributes;
}
/**
* @param attributes Collection of object attributes.
*/
public void setAttributes(Attribute[] attributes) {
this.attributes = attributes;
}
public final void dump(DataOutputStream file) throws IOException {
file.writeShort(modifiers);
file.writeShort(nameIndex);
file.writeShort(signatureIndex);
AttributeUtils.writeAttributes(attributes, file);
}
public final Attribute[] getAttributes() {
return attributes;
}
public final ConstantPool getConstantPool() {
return cpool;
}
public final int getNameIndex() {
return nameIndex;
}
public final int getSignatureIndex() {
return signatureIndex;
}
public final String getName() {
if (name == null) {
ConstantUtf8 c = (ConstantUtf8) cpool.getConstant(nameIndex, Constants.CONSTANT_Utf8);
name = c.getValue();
}
return name;
}
public final String getSignature() {
if (signature == null) {
ConstantUtf8 c = (ConstantUtf8) cpool.getConstant(signatureIndex, Constants.CONSTANT_Utf8);
signature = c.getValue();
}
return signature;
}
/**
* This will return the contents of a signature attribute attached to a member, or if there is none it will return the same as
* 'getSignature()'. Signature attributes are attached to members that were declared generic.
*/
public final String getDeclaredSignature() {
if (getGenericSignature() != null)
return getGenericSignature();
return getSignature();
}
public AnnotationGen[] getAnnotations() {
// Ensure we have unpacked any attributes that contain annotations.
// We don't remove these annotation attributes from the attributes list, they
// remain there.
if (annotations == null) {
// Find attributes that contain annotation data
List<AnnotationGen> accumulatedAnnotations = new ArrayList<AnnotationGen>();
for (int i = 0; i < attributes.length; i++) {
Attribute attribute = attributes[i];
if (attribute instanceof RuntimeAnnos) {
RuntimeAnnos runtimeAnnotations = (RuntimeAnnos) attribute;
accumulatedAnnotations.addAll(runtimeAnnotations.getAnnotations());
}
}
if (accumulatedAnnotations.size() == 0) {
annotations = AnnotationGen.NO_ANNOTATIONS;
} else {
annotations = accumulatedAnnotations.toArray(new AnnotationGen[] {});
}
}
return annotations;
}
/**
* Hunts for a signature attribute on the member and returns its contents. So where the 'regular' signature may be
* (Ljava/util/Vector;)V the signature attribute may in fact say 'Ljava/lang/Vector<Ljava/lang/String>;' Coded for performance -
* searches for the attribute only when requested - only searches for it once.
*/
public final String getGenericSignature() {
if (!searchedForSignatureAttribute) {
Signature sig = AttributeUtils.getSignatureAttribute(attributes);
signatureAttributeString = (sig == null ? null : sig.getSignature());
searchedForSignatureAttribute = true;
}
return signatureAttributeString;
}
}
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