| package org.aspectj.apache.bcel.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 java.io.DataInputStream; |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| |
| import org.aspectj.apache.bcel.Constants; |
| |
| /** |
| * 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, |
| * org.aspectj.apache.bcel.classfile.AttributeReader)">Attribute.addAttributeReader</a>. |
| * |
| * |
| * @version $Id: Unknown.java,v 1.6 2009/09/15 19:40:12 aclement Exp $ |
| * @see org.aspectj.apache.bcel.classfile.Attribute |
| * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A> |
| */ |
| public final class Unknown extends Attribute { |
| private byte[] bytes; |
| private String name; |
| |
| // evil static - removed by Andy C - no apparent users (4 Mar 06) |
| // 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)).getValue(); |
| // 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 |
| */ |
| @Override |
| public void accept(ClassVisitor v) { |
| v.visitUnknown(this); |
| } |
| |
| /** |
| * Dump unknown bytes to file stream. |
| * |
| * @param file Output file stream |
| * @throws IOException |
| */ |
| @Override |
| 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. |
| */ |
| @Override |
| public String getName() { |
| return name; |
| } |
| |
| /** |
| * @param bytes. |
| */ |
| public final void setBytes(byte[] bytes) { |
| this.bytes = bytes; |
| } |
| |
| /** |
| * @return String representation. |
| */ |
| @Override |
| 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 |
| */ |
| // @Override |
| // public Attribute copy(ConstantPool constant_pool) { |
| // Unknown c = (Unknown) clone(); |
| // |
| // if (bytes != null) |
| // c.bytes = bytes.clone(); |
| // |
| // c.cpool = constant_pool; |
| // return c; |
| // } |
| } |