| /* |
| * 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.*; |
| import java.util.*; |
| |
| /** |
| * This class represents a reference to an unknown (i.e., |
| * application-specific) attribute of a class. It is instantiated from the |
| * <em>Attribute.readAttribute()</em> method. Applications that need to |
| * read in application-specific attributes should create an <a |
| * href="./AttributeReader.html">AttributeReader</a> implementation and |
| * attach it via <a |
| * href="./Attribute.html#addAttributeReader(java.lang.String, |
| * com.sun.org.apache.bcel.internal.classfile.AttributeReader)">Attribute.addAttributeReader</a>. |
| |
| * |
| * @see com.sun.org.apache.bcel.internal.classfile.Attribute |
| * @see com.sun.org.apache.bcel.internal.classfile.AttributeReader |
| * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A> |
| */ |
| public final class Unknown extends Attribute { |
| private byte[] bytes; |
| private String name; |
| |
| private static HashMap unknown_attributes = new HashMap(); |
| |
| /** @return array of unknown attributes, but just one for each kind. |
| */ |
| static Unknown[] getUnknownAttributes() { |
| Unknown[] unknowns = new Unknown[unknown_attributes.size()]; |
| Iterator entries = unknown_attributes.values().iterator(); |
| |
| for(int i=0; entries.hasNext(); i++) |
| unknowns[i] = (Unknown)entries.next(); |
| |
| unknown_attributes.clear(); |
| return unknowns; |
| } |
| |
| /** |
| * Initialize from another object. Note that both objects use the same |
| * references (shallow copy). Use clone() for a physical copy. |
| */ |
| public Unknown(Unknown c) { |
| this(c.getNameIndex(), c.getLength(), c.getBytes(), c.getConstantPool()); |
| } |
| |
| /** |
| * Create a non-standard attribute. |
| * |
| * @param name_index Index in constant pool |
| * @param length Content length in bytes |
| * @param bytes Attribute contents |
| * @param constant_pool Array of constants |
| */ |
| public Unknown(int name_index, int length, byte[] bytes, |
| ConstantPool constant_pool) |
| { |
| super(Constants.ATTR_UNKNOWN, name_index, length, constant_pool); |
| this.bytes = bytes; |
| |
| name = ((ConstantUtf8)constant_pool.getConstant(name_index, |
| Constants.CONSTANT_Utf8)).getBytes(); |
| unknown_attributes.put(name, this); |
| } |
| |
| /** |
| * Construct object from file stream. |
| * @param name_index Index in constant pool |
| * @param length Content length in bytes |
| * @param file Input stream |
| * @param constant_pool Array of constants |
| * @throws IOException |
| */ |
| Unknown(int name_index, int length, DataInputStream file, |
| ConstantPool constant_pool) |
| throws IOException |
| { |
| this(name_index, length, (byte [])null, constant_pool); |
| |
| if(length > 0) { |
| bytes = new byte[length]; |
| file.readFully(bytes); |
| } |
| } |
| |
| /** |
| * 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.visitUnknown(this); |
| } |
| /** |
| * Dump unknown bytes to file stream. |
| * |
| * @param file Output file stream |
| * @throws IOException |
| */ |
| public final void dump(DataOutputStream file) throws IOException |
| { |
| super.dump(file); |
| if(length > 0) |
| file.write(bytes, 0, length); |
| } |
| /** |
| * @return data bytes. |
| */ |
| public final byte[] getBytes() { return bytes; } |
| |
| /** |
| * @return name of attribute. |
| */ |
| public final String getName() { return name; } |
| |
| /** |
| * @param bytes. |
| */ |
| public final void setBytes(byte[] bytes) { |
| this.bytes = bytes; |
| } |
| |
| /** |
| * @return String representation. |
| */ |
| public final String toString() { |
| if(length == 0 || bytes == null) |
| return "(Unknown attribute " + name + ")"; |
| |
| String hex; |
| if(length > 10) { |
| byte[] tmp = new byte[10]; |
| System.arraycopy(bytes, 0, tmp, 0, 10); |
| hex = Utility.toHexString(tmp) + "... (truncated)"; |
| } |
| else |
| hex = Utility.toHexString(bytes); |
| |
| return "(Unknown attribute " + name + ": " + hex + ")"; |
| } |
| |
| /** |
| * @return deep copy of this attribute |
| */ |
| public Attribute copy(ConstantPool constant_pool) { |
| Unknown c = (Unknown)clone(); |
| |
| if(bytes != null) |
| c.bytes = (byte[])bytes.clone(); |
| |
| c.constant_pool = constant_pool; |
| return c; |
| } |
| } |