| /* |
| * 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.DataInput; |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| |
| import org.apache.tomcat.util.bcel.Constants; |
| |
| /** |
| * This class is derived from <em>Attribute</em> and represents a reference |
| * to a GJ attribute. |
| * |
| * @version $Id: Signature.java,v 1.1 2011/06/28 21:08:24 rherrmann Exp $ |
| * @author <A HREF="mailto:m.dahm@gmx.de">M. Dahm</A> |
| * @see Attribute |
| */ |
| public final class Signature extends Attribute { |
| |
| private static final long serialVersionUID = 7493781777025829964L; |
| private int signature_index; |
| |
| |
| /** |
| * Construct object from file stream. |
| * @param name_index Index in constant pool to CONSTANT_Utf8 |
| * @param length Content length in bytes |
| * @param file Input stream |
| * @param constant_pool Array of constants |
| * @throws IOException |
| */ |
| Signature(int name_index, int length, DataInput file, ConstantPool constant_pool) |
| throws IOException { |
| this(name_index, length, file.readUnsignedShort(), constant_pool); |
| } |
| |
| |
| /** |
| * @param name_index Index in constant pool to CONSTANT_Utf8 |
| * @param length Content length in bytes |
| * @param signature_index Index in constant pool to CONSTANT_Utf8 |
| * @param constant_pool Array of constants |
| */ |
| public Signature(int name_index, int length, int signature_index, ConstantPool constant_pool) { |
| super(Constants.ATTR_SIGNATURE, name_index, length, constant_pool); |
| this.signature_index = signature_index; |
| } |
| |
| |
| /** |
| * Dump source file attribute to file stream in binary format. |
| * |
| * @param file Output file stream |
| * @throws IOException |
| */ |
| @Override |
| public final void dump( DataOutputStream file ) throws IOException { |
| super.dump(file); |
| file.writeShort(signature_index); |
| } |
| |
| |
| /** |
| * @return GJ signature. |
| */ |
| public final String getSignature() { |
| ConstantUtf8 c = (ConstantUtf8) constant_pool.getConstant(signature_index, |
| Constants.CONSTANT_Utf8); |
| return c.getBytes(); |
| } |
| |
| /** |
| * @return String representation |
| */ |
| @Override |
| public final String toString() { |
| String s = getSignature(); |
| return "Signature(" + s + ")"; |
| } |
| |
| |
| /** |
| * @return deep copy of this attribute |
| */ |
| @Override |
| public Attribute copy( ConstantPool _constant_pool ) { |
| return (Signature) clone(); |
| } |
| } |