1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 package org.apache.bcel.classfile; 18 19 import java.io.DataInput; 20 import java.io.DataOutputStream; 21 import java.io.IOException; 22 23 import org.apache.bcel.Const; 24 25 /** 26 * This class is derived from the abstract {@link Constant} and represents a reference to a method type. 27 * 28 * @see Constant 29 * @since 6.0 30 */ 31 public final class ConstantMethodType extends Constant { 32 33 private int descriptorIndex; 34 35 /** 36 * Initialize from another object. 37 * 38 * @param c Source to copy. 39 */ 40 public ConstantMethodType(final ConstantMethodType c) { 41 this(c.getDescriptorIndex()); 42 } 43 44 /** 45 * Initialize instance from file data. 46 * 47 * @param file Input stream 48 * @throws IOException if an I/O error occurs. 49 */ 50 ConstantMethodType(final DataInput file) throws IOException { 51 this(file.readUnsignedShort()); 52 } 53 54 public ConstantMethodType(final int descriptorIndex) { 55 super(Const.CONSTANT_MethodType); 56 this.descriptorIndex = descriptorIndex; 57 } 58 59 /** 60 * Called by objects that are traversing the nodes of the tree implicitly defined by the contents of a Java class. I.e., 61 * the hierarchy of methods, fields, attributes, etc. spawns a tree of objects. 62 * 63 * @param v Visitor object 64 */ 65 @Override 66 public void accept(final Visitor v) { 67 v.visitConstantMethodType(this); 68 } 69 70 /** 71 * Dump name and signature index to file stream in binary format. 72 * 73 * @param file Output file stream 74 * @throws IOException if an I/O error occurs. 75 */ 76 @Override 77 public void dump(final DataOutputStream file) throws IOException { 78 file.writeByte(super.getTag()); 79 file.writeShort(descriptorIndex); 80 } 81 82 public int getDescriptorIndex() { 83 return descriptorIndex; 84 } 85 86 public void setDescriptorIndex(final int descriptorIndex) { 87 this.descriptorIndex = descriptorIndex; 88 } 89 90 /** 91 * @return String representation 92 */ 93 @Override 94 public String toString() { 95 return super.toString() + "(descriptorIndex = " + descriptorIndex + ")"; 96 } 97 }