1 /* 2 * reserved comment block 3 * DO NOT REMOVE OR ALTER! 4 */ 5 /* 6 * Licensed to the Apache Software Foundation (ASF) under one or more 7 * contributor license agreements. See the NOTICE file distributed with 8 * this work for additional information regarding copyright ownership. 9 * The ASF licenses this file to You under the Apache License, Version 2.0 10 * (the "License"); you may not use this file except in compliance with 11 * the License. You may obtain a copy of the License at 12 * 13 * http://www.apache.org/licenses/LICENSE-2.0 14 * 15 * Unless required by applicable law or agreed to in writing, software 16 * distributed under the License is distributed on an "AS IS" BASIS, 17 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 18 * See the License for the specific language governing permissions and 19 * limitations under the License. 20 */ 21 22 package com.sun.org.apache.bcel.internal.classfile; 23 24 import java.io.DataInput; 25 import java.io.DataOutputStream; 26 import java.io.IOException; 27 28 import com.sun.org.apache.bcel.internal.Const; 29 30 /** 31 * This class is derived from the abstract {@link Constant} 32 * and represents a reference to a method handle. 33 * 34 * @see Constant 35 * @since 6.0 36 */ 37 public final class ConstantMethodHandle extends Constant { 38 39 private int reference_kind; 40 private int reference_index; 41 42 43 /** 44 * Initialize from another object. 45 */ 46 public ConstantMethodHandle(final ConstantMethodHandle c) { 47 this(c.getReferenceKind(), c.getReferenceIndex()); 48 } 49 50 51 /** 52 * Initialize instance from file data. 53 * 54 * @param file Input stream 55 * @throws IOException 56 */ 57 ConstantMethodHandle(final DataInput file) throws IOException { 58 this(file.readUnsignedByte(), file.readUnsignedShort()); 59 } 60 61 62 public ConstantMethodHandle(final int reference_kind, final int reference_index) { 63 super(Const.CONSTANT_MethodHandle); 64 this.reference_kind = reference_kind; 65 this.reference_index = reference_index; 66 } 67 68 69 /** 70 * Called by objects that are traversing the nodes of the tree implicitly 71 * defined by the contents of a Java class. I.e., the hierarchy of methods, 72 * fields, attributes, etc. spawns a tree of objects. 73 * 74 * @param v Visitor object 75 */ 76 @Override 77 public void accept( final Visitor v ) { 78 v.visitConstantMethodHandle(this); 79 } 80 81 82 /** 83 * Dump method kind and index to file stream in binary format. 84 * 85 * @param file Output file stream 86 * @throws IOException 87 */ 88 @Override 89 public final void dump( final DataOutputStream file ) throws IOException { 90 file.writeByte(super.getTag()); 91 file.writeByte(reference_kind); 92 file.writeShort(reference_index); 93 } 94 95 96 public int getReferenceKind() { 97 return reference_kind; 98 } 99 100 101 public void setReferenceKind(final int reference_kind) { 102 this.reference_kind = reference_kind; 103 } 104 105 106 public int getReferenceIndex() { 107 return reference_index; 108 } 109 110 111 public void setReferenceIndex(final int reference_index) { 112 this.reference_index = reference_index; 113 } 114 115 116 /** 117 * @return String representation 118 */ 119 @Override 120 public final String toString() { 121 return super.toString() + "(reference_kind = " + reference_kind + 122 ", reference_index = " + reference_index + ")"; 123 } 124 }