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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
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* language governing permissions and limitations under the License.
*
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* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
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* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
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*/
package com.sun.jdo.api.persistence.enhancer.classfile;
import java.io.*;
import java.util.Vector;
import java.util.Enumeration;
/**
* ClassMethod models the static and non-static methods of a class within
* a class file. This includes constructors and initializer code.
*/
public class ClassMethod extends ClassMember {
/* The name of the constructor code */
public final static String intializerName = "";//NOI18N
/* The name of the static initializer code */
public final static String staticIntializerName = "";//NOI18N
/* access flag bit mask - see VMConstants */
private int accessFlags;
/* The name of the method */
private ConstUtf8 methodName;
/* The type signature of the method */
private ConstUtf8 methodSignature;
/* The attributes associated with the field */
private AttributeVector methodAttributes;
/* public accessors */
/**
* Return the access flags for the method - see VMConstants
*/
public int access() {
return accessFlags;
}
/**
* Update the access flags for the field - see VMConstants
*/
public void setAccess(int newFlags) {
accessFlags = newFlags;
}
/**
* Is the method abstract?
*/
public boolean isAbstract() {
return (accessFlags & ACCAbstract) != 0;
}
/**
* Is the method native?
*/
public boolean isNative() {
return (accessFlags & ACCNative) != 0;
}
/**
* Return the name of the method
*/
public ConstUtf8 name() {
return methodName;
}
/**
* Change the name of the method
*/
public void changeName(ConstUtf8 name) {
methodName = name;
}
/**
* Return the type signature of the method
*/
public ConstUtf8 signature() {
return methodSignature;
}
/**
* Change the type signature of the method
*/
public void changeSignature(ConstUtf8 newSig) {
methodSignature = newSig;
}
/**
* Return the attributes associated with the method
*/
public AttributeVector attributes() {
return methodAttributes;
}
/**
* Construct a class method object
*/
public ClassMethod(int accFlags, ConstUtf8 name, ConstUtf8 sig,
AttributeVector methodAttrs) {
accessFlags = accFlags;
methodName = name;
methodSignature = sig;
methodAttributes = methodAttrs;
}
/**
* Returns the size of the method byteCode (if any)
*/
int codeSize() {
CodeAttribute codeAttr = codeAttribute();
return (codeAttr == null) ? 0 : codeAttr.codeSize();
}
/**
* Returns the CodeAttribute associated with this method (if any)
*/
public CodeAttribute codeAttribute() {
Enumeration e = methodAttributes.elements();
while (e.hasMoreElements()) {
ClassAttribute attr = (ClassAttribute) e.nextElement();
if (attr instanceof CodeAttribute)
return (CodeAttribute) attr;
}
return null;
}
/* package local methods */
static ClassMethod read(DataInputStream data, ConstantPool pool)
throws IOException {
int accessFlags = data.readUnsignedShort();
int nameIndex = data.readUnsignedShort();
int sigIndex = data.readUnsignedShort();
ClassMethod f =
new ClassMethod(accessFlags,
(ConstUtf8) pool.constantAt(nameIndex),
(ConstUtf8) pool.constantAt(sigIndex),
null);
f.methodAttributes = AttributeVector.readAttributes(data, pool);
return f;
}
void write(DataOutputStream data) throws IOException {
CodeAttribute codeAttr = codeAttribute();
data.writeShort(accessFlags);
data.writeShort(methodName.getIndex());
data.writeShort(methodSignature.getIndex());
methodAttributes.write(data);
}
void print(PrintStream out, int indent) {
ClassPrint.spaces(out, indent);
out.print("'" + methodName.asString() + "'");//NOI18N
out.print(" sig = " + methodSignature.asString());//NOI18N
out.print(" accessFlags = " + Integer.toString(accessFlags));//NOI18N
out.println(" attributes:");//NOI18N
methodAttributes.print(out, indent+2);
}
}