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71 lines
2.5 KiB
Java
71 lines
2.5 KiB
Java
/*
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* Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package separate;
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import java.io.*;
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public class AttributeInjector implements ClassFilePreprocessor {
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private String attributeName;
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private byte[] attributeData;
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public AttributeInjector(String attributeName, byte[] attributeData) {
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this.attributeName = attributeName;
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this.attributeData = attributeData;
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}
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public byte[] preprocess(String name, byte[] cf) {
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ClassFile classfile = new ClassFile(cf);
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short cpIndex = (short)classfile.constant_pool.size();
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ClassFile.CpUtf8 entry = new ClassFile.CpUtf8();
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entry.bytes = new byte[attributeName.length()];
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for (int i = 0; i < attributeName.length(); ++i) {
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entry.bytes[i] = (byte)attributeName.charAt(i);
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}
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classfile.constant_pool.add(entry);
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ClassFile.Attribute attr = new ClassFile.Attribute();
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attr.attribute_name_index = cpIndex;
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attr.info = attributeData;
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classfile.attributes.add(attr);
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return classfile.toByteArray();
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}
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/*
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public static void main(String argv[]) throws Exception {
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File input = new File(argv[0]);
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byte[] buffer = new byte[(int)input.length()];
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new FileInputStream(input).read(buffer);
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ClassFilePreprocessor cfp =
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new AttributeInjector("RequiresBridges", new byte[0]);
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byte[] cf = cfp.preprocess(argv[0], buffer);
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new FileOutputStream(argv[0] + ".mod").write(cf);
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}
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*/
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}
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