| /* |
| * reserved comment block |
| * DO NOT REMOVE OR ALTER! |
| */ |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.sun.org.apache.bcel.internal.classfile; |
| |
| 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. |
| * |
| * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A> |
| */ |
| 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()); |
| } |
| } |