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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 1997-2007 Sun Microsystems, Inc. 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.html
* or glassfish/bootstrap/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
* Sun designates this particular file as subject to the "Classpath" exception
* as provided by Sun in the GPL Version 2 section of the License file that
* accompanied this code. If applicable, add the following below the License
* Header, with the fields enclosed by brackets [] replaced by your own
* identifying information: "Portions Copyrighted [year]
* [name of copyright owner]"
*
* Contributor(s):
*
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
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 [email protected].
*
* 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
* .
*/
import com.sun.org.apache.bcel.internal.Constants;
import com.sun.org.apache.bcel.internal.generic.Type;
import java.io.*;
/**
* This class represents the method info structure, i.e., the representation
* for a method in the class. See JVM specification for details.
* A method has access flags, a name, a signature and a number of attributes.
*
* @version $Id: Method.java,v 1.3 2007-07-19 04:34:43 ofung Exp $
* @author M. Dahm
*/
public final class Method extends FieldOrMethod {
/**
* Empty constructor, all attributes have to be defined via `setXXX'
* methods. Use at your own risk.
*/
public Method() {}
/**
* Initialize from another object. Note that both objects use the same
* references (shallow copy). Use clone() for a physical copy.
*/
public Method(Method c) {
super(c);
}
/**
* Construct object from file stream.
* @param file Input stream
* @throws IOException
* @throws ClassFormatException
*/
Method(DataInputStream file, ConstantPool constant_pool)
throws IOException, ClassFormatException
{
super(file, constant_pool);
}
/**
* @param access_flags Access rights of method
* @param name_index Points to field name in constant pool
* @param signature_index Points to encoded signature
* @param attributes Collection of attributes
* @param constant_pool Array of constants
*/
public Method(int access_flags, int name_index, int signature_index,
Attribute[] attributes, ConstantPool constant_pool)
{
super(access_flags, name_index, signature_index, attributes, constant_pool);
}
/**
* 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) {
v.visitMethod(this);
}
/**
* @return Code attribute of method, if any
*/
public final Code getCode() {
for(int i=0; i < attributes_count; i++)
if(attributes[i] instanceof Code)
return (Code)attributes[i];
return null;
}
/**
* @return ExceptionTable attribute of method, if any, i.e., list all
* exceptions the method may throw not exception handlers!
*/
public final ExceptionTable getExceptionTable() {
for(int i=0; i < attributes_count; i++)
if(attributes[i] instanceof ExceptionTable)
return (ExceptionTable)attributes[i];
return null;
}
/** @return LocalVariableTable of code attribute if any, i.e. the call is forwarded
* to the Code atribute.
*/
public final LocalVariableTable getLocalVariableTable() {
Code code = getCode();
if(code != null)
return code.getLocalVariableTable();
else
return null;
}
/** @return LineNumberTable of code attribute if any, i.e. the call is forwarded
* to the Code atribute.
*/
public final LineNumberTable getLineNumberTable() {
Code code = getCode();
if(code != null)
return code.getLineNumberTable();
else
return null;
}
/**
* Return string representation close to declaration format,
* `public static void _main(String[] args) throws IOException', e.g.
*
* @return String representation of the method.
*/
public final String toString() {
ConstantUtf8 c;
String name, signature, access; // Short cuts to constant pool
StringBuffer buf;
access = Utility.accessToString(access_flags);
// Get name and signature from constant pool
c = (ConstantUtf8)constant_pool.getConstant(signature_index,
Constants.CONSTANT_Utf8);
signature = c.getBytes();
c = (ConstantUtf8)constant_pool.getConstant(name_index, Constants.CONSTANT_Utf8);
name = c.getBytes();
signature = Utility.methodSignatureToString(signature, name, access, true,
getLocalVariableTable());
buf = new StringBuffer(signature);
for(int i=0; i < attributes_count; i++) {
Attribute a = attributes[i];
if(!((a instanceof Code) || (a instanceof ExceptionTable)))
buf.append(" [" + a.toString() + "]");
}
ExceptionTable e = getExceptionTable();
if(e != null) {
String str = e.toString();
if(!str.equals(""))
buf.append("\n\t\tthrows " + str);
}
return buf.toString();
}
/**
* @return deep copy of this method
*/
public final Method copy(ConstantPool constant_pool) {
return (Method)copy_(constant_pool);
}
/**
* @return return type of method
*/
public Type getReturnType() {
return Type.getReturnType(getSignature());
}
/**
* @return array of method argument types
*/
public Type[] getArgumentTypes() {
return Type.getArgumentTypes(getSignature());
}
}