| /* |
| * 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 org.apache.tomcat.util.bcel.classfile; |
| |
| import java.io.DataInputStream; |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| |
| /** |
| * @version $Id: ElementValue |
| * @author <A HREF="mailto:dbrosius@qis.net">D. Brosius</A> |
| * @since 5.3 |
| */ |
| public abstract class ElementValue |
| { |
| protected int type; |
| |
| protected ConstantPool cpool; |
| |
| @Override |
| public String toString() |
| { |
| return stringifyValue(); |
| } |
| |
| protected ElementValue(int type, ConstantPool cpool) |
| { |
| this.type = type; |
| this.cpool = cpool; |
| } |
| |
| |
| public abstract String stringifyValue(); |
| |
| public abstract void dump(DataOutputStream dos) throws IOException; |
| |
| public static final int STRING = 's'; |
| |
| public static final int ENUM_CONSTANT = 'e'; |
| |
| public static final int CLASS = 'c'; |
| |
| public static final int ANNOTATION = '@'; |
| |
| public static final int ARRAY = '['; |
| |
| public static final int PRIMITIVE_INT = 'I'; |
| |
| public static final int PRIMITIVE_BYTE = 'B'; |
| |
| public static final int PRIMITIVE_CHAR = 'C'; |
| |
| public static final int PRIMITIVE_DOUBLE = 'D'; |
| |
| public static final int PRIMITIVE_FLOAT = 'F'; |
| |
| public static final int PRIMITIVE_LONG = 'J'; |
| |
| public static final int PRIMITIVE_SHORT = 'S'; |
| |
| public static final int PRIMITIVE_BOOLEAN = 'Z'; |
| |
| public static ElementValue readElementValue(DataInputStream dis, |
| ConstantPool cpool) throws IOException |
| { |
| byte type = dis.readByte(); |
| switch (type) |
| { |
| case 'B': // byte |
| return new SimpleElementValue(PRIMITIVE_BYTE, dis |
| .readUnsignedShort(), cpool); |
| case 'C': // char |
| return new SimpleElementValue(PRIMITIVE_CHAR, dis |
| .readUnsignedShort(), cpool); |
| case 'D': // double |
| return new SimpleElementValue(PRIMITIVE_DOUBLE, dis |
| .readUnsignedShort(), cpool); |
| case 'F': // float |
| return new SimpleElementValue(PRIMITIVE_FLOAT, dis |
| .readUnsignedShort(), cpool); |
| case 'I': // int |
| return new SimpleElementValue(PRIMITIVE_INT, dis |
| .readUnsignedShort(), cpool); |
| case 'J': // long |
| return new SimpleElementValue(PRIMITIVE_LONG, dis |
| .readUnsignedShort(), cpool); |
| case 'S': // short |
| return new SimpleElementValue(PRIMITIVE_SHORT, dis |
| .readUnsignedShort(), cpool); |
| case 'Z': // boolean |
| return new SimpleElementValue(PRIMITIVE_BOOLEAN, dis |
| .readUnsignedShort(), cpool); |
| case 's': // String |
| return new SimpleElementValue(STRING, dis.readUnsignedShort(), |
| cpool); |
| case 'e': // Enum constant |
| return new EnumElementValue(ENUM_CONSTANT, dis.readUnsignedShort(), |
| dis.readUnsignedShort(), cpool); |
| case 'c': // Class |
| return new ClassElementValue(CLASS, dis.readUnsignedShort(), cpool); |
| case '@': // Annotation |
| // TODO isRuntimeVisible |
| return new AnnotationElementValue(ANNOTATION, AnnotationEntry.read( |
| dis, cpool), cpool); |
| case '[': // Array |
| int numArrayVals = dis.readUnsignedShort(); |
| ElementValue[] evalues = new ElementValue[numArrayVals]; |
| for (int j = 0; j < numArrayVals; j++) |
| { |
| evalues[j] = ElementValue.readElementValue(dis, cpool); |
| } |
| return new ArrayElementValue(ARRAY, evalues, cpool); |
| default: |
| throw new RuntimeException( |
| "Unexpected element value kind in annotation: " + type); |
| } |
| } |
| |
| |
| } |