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Diffstat (limited to 'src/share/classes/com/sun/org/apache/bcel/internal/classfile/ConstantClass.java')
-rw-r--r-- | src/share/classes/com/sun/org/apache/bcel/internal/classfile/ConstantClass.java | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/src/share/classes/com/sun/org/apache/bcel/internal/classfile/ConstantClass.java b/src/share/classes/com/sun/org/apache/bcel/internal/classfile/ConstantClass.java new file mode 100644 index 0000000..e047ca8 --- /dev/null +++ b/src/share/classes/com/sun/org/apache/bcel/internal/classfile/ConstantClass.java @@ -0,0 +1,157 @@ +/* + * reserved comment block + * DO NOT REMOVE OR ALTER! + */ +package com.sun.org.apache.bcel.internal.classfile; + +/* ==================================================================== + * The Apache Software License, Version 1.1 + * + * Copyright (c) 2001 The Apache Software Foundation. All rights + * reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * 3. The end-user documentation included with the redistribution, + * if any, must include the following acknowledgment: + * "This product includes software developed by the + * Apache Software Foundation (http://www.apache.org/)." + * Alternately, this acknowledgment may appear in the software itself, + * if and wherever such third-party acknowledgments normally appear. + * + * 4. The names "Apache" and "Apache Software Foundation" and + * "Apache BCEL" must not be used to endorse or promote products + * derived from this software without prior written permission. For + * written permission, please contact apache@apache.org. + * + * 5. Products derived from this software may not be called "Apache", + * "Apache BCEL", nor may "Apache" appear in their name, without + * prior written permission of the Apache Software Foundation. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR + * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF + * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT + * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * ==================================================================== + * + * This software consists of voluntary contributions made by many + * individuals on behalf of the Apache Software Foundation. For more + * information on the Apache Software Foundation, please see + * <http://www.apache.org/>. + */ + +import com.sun.org.apache.bcel.internal.Constants; +import java.io.*; + +/** + * This class is derived from the abstract + * <A HREF="com.sun.org.apache.bcel.internal.classfile.Constant.html">Constant</A> class + * and represents a reference to a (external) class. + * + * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A> + * @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(ConstantClass c) { + this(c.getNameIndex()); + } + + /** + * Initialize instance from file data. + * + * @param file Input stream + * @throws IOException + */ + ConstantClass(DataInputStream file) throws IOException + { + this(file.readUnsignedShort()); + } + + /** + * @param name_index Name index in constant pool. Should refer to a + * ConstantUtf8. + */ + public ConstantClass(int name_index) { + super(Constants.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 + */ + public void accept(Visitor v) { + v.visitConstantClass(this); + } + + /** + * Dump constant class to file stream in binary format. + * + * @param file Output file stream + * @throws IOException + */ + public final void dump(DataOutputStream file) throws IOException + { + file.writeByte(tag); + file.writeShort(name_index); + } + + /** + * @return Name index in constant pool of class name. + */ + public final int getNameIndex() { return name_index; } + + /** + * @param name_index. + */ + public final void setNameIndex(int name_index) { + this.name_index = name_index; + } + + + /** @return String object + */ + public Object getConstantValue(ConstantPool cp) { + Constant c = cp.getConstant(name_index, Constants.CONSTANT_Utf8); + return ((ConstantUtf8)c).getBytes(); + } + + /** @return dereferenced string + */ + public String getBytes(ConstantPool cp) { + return (String)getConstantValue(cp); + } + + /** + * @return String representation. + */ + public final String toString() { + return super.toString() + "(name_index = " + name_index + ")"; + } +} |