001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 018package org.apache.bcel.classfile; 019 020import java.io.DataInput; 021import java.io.DataOutputStream; 022import java.io.IOException; 023 024import org.apache.bcel.Const; 025 026/** 027 * This class represents a MethodParameters attribute. 028 * 029 * @see <a href="http://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.7.24"> 030 * The class File Format : The MethodParameters Attribute</a> 031 * @since 6.0 032 */ 033public class MethodParameters extends Attribute { 034 035 private MethodParameter[] parameters = new MethodParameter[0]; 036 037 MethodParameters(final int name_index, final int length, final DataInput input, final ConstantPool constant_pool) throws IOException { 038 super(Const.ATTR_METHOD_PARAMETERS, name_index, length, constant_pool); 039 040 final int parameters_count = input.readUnsignedByte(); 041 parameters = new MethodParameter[parameters_count]; 042 for (int i = 0; i < parameters_count; i++) { 043 parameters[i] = new MethodParameter(input); 044 } 045 } 046 047 public MethodParameter[] getParameters() { 048 return parameters; 049 } 050 051 public void setParameters(final MethodParameter[] parameters) { 052 this.parameters = parameters; 053 } 054 055 @Override 056 public void accept(final Visitor v) { 057 v.visitMethodParameters(this); 058 } 059 060 @Override 061 public Attribute copy(final ConstantPool _constant_pool) { 062 final MethodParameters c = (MethodParameters) clone(); 063 c.parameters = new MethodParameter[parameters.length]; 064 065 for (int i = 0; i < parameters.length; i++) { 066 c.parameters[i] = parameters[i].copy(); 067 } 068 c.setConstantPool(_constant_pool); 069 return c; 070 } 071 072 /** 073 * Dump method parameters attribute to file stream in binary format. 074 * 075 * @param file Output file stream 076 * @throws IOException 077 */ 078 @Override 079 public void dump(final DataOutputStream file) throws IOException { 080 super.dump(file); 081 file.writeByte(parameters.length); 082 for (final MethodParameter parameter : parameters) { 083 parameter.dump(file); 084 } 085 } 086}