Mirror of the BLOAT repository
https://www.cs.purdue.edu/homes/hosking/bloat/
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89 lines
2.6 KiB
89 lines
2.6 KiB
/**
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* All files in the distribution of BLOAT (Bytecode Level Optimization and
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* Analysis tool for Java(tm)) are Copyright 1997-2001 by the Purdue
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* Research Foundation of Purdue University. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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package EDU.purdue.cs.bloat.file;
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import java.io.*;
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/**
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* Attribute is an abstract class for an attribute defined for a method, field,
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* or class. An attribute consists of its name (represented as an index into the
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* constant pool) and its length. Attribute is extended to represent a constant
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* value, code, exceptions, etc.
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*
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* @see Code
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* @see ConstantValue
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* @see Exceptions
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*
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* @author Nate Nystrom (<a
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* href="mailto:nystrom@cs.purdue.edu">nystrom@cs.purdue.edu</a>)
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*/
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public abstract class Attribute {
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protected int nameIndex;
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protected int length;
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/**
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* Constructor.
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*
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* @param nameIndex
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* The index into the constant pool of the name of the attribute.
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* @param length
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* The length of the attribute, excluding the header.
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*/
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public Attribute(final int nameIndex, final int length) {
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this.nameIndex = nameIndex;
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this.length = length;
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}
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/**
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* Write the attribute to a data stream.
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*
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* @param out
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* The data stream of the class file.
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*/
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public abstract void writeData(DataOutputStream out) throws IOException;
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/**
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* Returns a string representation of the attribute.
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*/
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public String toString() {
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return "(attribute " + nameIndex + " " + length + ")";
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}
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/**
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* Returns the index into the constant pool of the name of the attribute.
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*/
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public int nameIndex() {
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return nameIndex;
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}
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/**
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* Returns the length of the attribute, excluding the header.
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*/
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public int length() {
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return length;
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}
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public Object clone() {
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throw new UnsupportedOperationException("Cannot clone Attribute! "
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+ " (subclass: " + this.getClass() + ")");
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}
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}
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