1 /* 2 * Copyright (c) 2017, 2020, Oracle and/or its affiliates. All rights reserved. 3 */ 4 /* 5 * Licensed to the Apache Software Foundation (ASF) under one or more 6 * contributor license agreements. See the NOTICE file distributed with 7 * this work for additional information regarding copyright ownership. 8 * The ASF licenses this file to You under the Apache License, Version 2.0 9 * (the "License"); you may not use this file except in compliance with 10 * the License. You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, software 15 * distributed under the License is distributed on an "AS IS" BASIS, 16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 17 * See the License for the specific language governing permissions and 18 * limitations under the License. 19 */ 20 21 package com.sun.org.apache.bcel.internal.classfile; 22 23 import java.io.DataInput; 24 import java.io.DataOutputStream; 25 import java.io.IOException; 26 27 /** 28 * @since 6.0 29 * @LastModified: Jan 2020 30 */ 31 public abstract class ElementValue 32 { 33 private final int type; 34 35 private final ConstantPool cpool; 36 37 @Override 38 public String toString() 39 { 40 return stringifyValue(); 41 } 42 43 protected ElementValue(final int type, final ConstantPool cpool) 44 { 45 this.type = type; 46 this.cpool = cpool; 47 } 48 49 public int getElementValueType() 50 { 51 return type; 52 } 53 54 public abstract String stringifyValue(); 55 56 public abstract void dump(DataOutputStream dos) throws IOException; 57 58 public static final byte STRING = 's'; 59 public static final byte ENUM_CONSTANT = 'e'; 60 public static final byte CLASS = 'c'; 61 public static final byte ANNOTATION = '@'; 62 public static final byte ARRAY = '['; 63 public static final byte PRIMITIVE_INT = 'I'; 64 public static final byte PRIMITIVE_BYTE = 'B'; 65 public static final byte PRIMITIVE_CHAR = 'C'; 66 public static final byte PRIMITIVE_DOUBLE = 'D'; 67 public static final byte PRIMITIVE_FLOAT = 'F'; 68 public static final byte PRIMITIVE_LONG = 'J'; 69 public static final byte PRIMITIVE_SHORT = 'S'; 70 public static final byte PRIMITIVE_BOOLEAN = 'Z'; 71 72 public static ElementValue readElementValue(final DataInput input, final ConstantPool cpool) throws IOException 73 { 74 final byte type = input.readByte(); 75 switch (type) 76 { 77 case PRIMITIVE_BYTE: 78 case PRIMITIVE_CHAR: 79 case PRIMITIVE_DOUBLE: 80 case PRIMITIVE_FLOAT: 81 case PRIMITIVE_INT: 82 case PRIMITIVE_LONG: 83 case PRIMITIVE_SHORT: 84 case PRIMITIVE_BOOLEAN: 85 case STRING: 86 return new SimpleElementValue(type, input.readUnsignedShort(), cpool); 87 88 case ENUM_CONSTANT: 89 return new EnumElementValue(ENUM_CONSTANT, input.readUnsignedShort(), input.readUnsignedShort(), cpool); 90 91 case CLASS: 92 return new ClassElementValue(CLASS, input.readUnsignedShort(), cpool); 93 94 case ANNOTATION: 95 // TODO isRuntimeVisible 96 return new AnnotationElementValue(ANNOTATION, AnnotationEntry.read(input, cpool, false), cpool); 97 98 case ARRAY: 99 final int numArrayVals = input.readUnsignedShort(); 100 final ElementValue[] evalues = new ElementValue[numArrayVals]; 101 for (int j = 0; j < numArrayVals; j++) 102 { 103 evalues[j] = ElementValue.readElementValue(input, cpool); 104 } 105 return new ArrayElementValue(ARRAY, evalues, cpool); 106 107 default: 108 throw new RuntimeException("Unexpected element value kind in annotation: " + type); 109 } 110 } 111 112 /** @since 6.0 */ 113 final ConstantPool getConstantPool() { 114 return cpool; 115 } 116 117 /** @since 6.0 */ 118 final int getType() { 119 return type; 120 } 121 122 public String toShortString() 123 { 124 return stringifyValue(); 125 } 126 }