/* * reserved comment block * DO NOT REMOVE OR ALTER! */ /* * 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 com.sun.org.apache.bcel.internal.classfile; import java.io.DataInput; import java.io.DataOutputStream; import java.io.IOException; import com.sun.org.apache.bcel.internal.Const; /** * This class is derived from the abstract {@link Constant} * and represents a reference to a (external) class. * * @version $Id: ConstantClass.java 1749603 2016-06-21 20:50:19Z ggregory $ * @see Constant */ public final class ConstantClass extends Constant implements ConstantObject { private int name_index; // Identical to ConstantString except for the name /** * Initialize from another object. */ public ConstantClass(final ConstantClass c) { this(c.getNameIndex()); } /** * Initialize instance from file data. * * @param file Input stream * @throws IOException */ ConstantClass(final DataInput file) throws IOException { this(file.readUnsignedShort()); } /** * @param name_index Name index in constant pool. Should refer to a * ConstantUtf8. */ public ConstantClass(final int name_index) { super(Const.CONSTANT_Class); this.name_index = name_index; } /** * Called by objects that are traversing the nodes of the tree implicitely * defined by the contents of a Java class. I.e., the hierarchy of methods, * fields, attributes, etc. spawns a tree of objects. * * @param v Visitor object */ @Override public void accept( final Visitor v ) { v.visitConstantClass(this); } /** * Dump constant class to file stream in binary format. * * @param file Output file stream * @throws IOException */ @Override public final void dump( final DataOutputStream file ) throws IOException { file.writeByte(super.getTag()); file.writeShort(name_index); } /** * @return Name index in constant pool of class name. */ public final int getNameIndex() { return name_index; } /** * @param name_index the name index in the constant pool of this Constant Class */ public final void setNameIndex( final int name_index ) { this.name_index = name_index; } /** @return String object */ @Override public Object getConstantValue( final ConstantPool cp ) { final Constant c = cp.getConstant(name_index, Const.CONSTANT_Utf8); return ((ConstantUtf8) c).getBytes(); } /** @return dereferenced string */ public String getBytes( final ConstantPool cp ) { return (String) getConstantValue(cp); } /** * @return String representation. */ @Override public final String toString() { return super.toString() + "(name_index = " + name_index + ")"; } }