66 lines
1.9 KiB
Java
66 lines
1.9 KiB
Java
/*******************************************************************************
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* Copyright (c) 2002,2006 IBM Corporation.
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the Eclipse Public License v1.0
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* which accompanies this distribution, and is available at
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* http://www.eclipse.org/legal/epl-v10.html
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*
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* Contributors:
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* IBM Corporation - initial API and implementation
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*******************************************************************************/
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package com.ibm.wala.shrikeCT;
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/**
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* This class builds serializable SourceFile attributes.
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*
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* After constructing a SourceFileWriter, you must call setSourceFileCPIndex.
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*/
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public final class SourceFileWriter extends ClassWriter.Element {
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final private int attrID;
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private int index = -1;
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/**
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* Build an empty writer.
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*
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* @throws IllegalArgumentException if w is null
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*/
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public SourceFileWriter(ClassWriter w) {
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if (w == null) {
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throw new IllegalArgumentException("w is null");
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}
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attrID = w.addCPUtf8("SourceFile");
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}
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private void verify() {
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if (index < 0) {
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throw new IllegalArgumentException("The value's constant pool index is not set");
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}
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}
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@Override
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public int getSize() throws IllegalArgumentException {
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verify();
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return 8;
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}
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@Override
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public int copyInto(byte[] buf, int offset) throws IllegalArgumentException {
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verify();
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ClassWriter.setUShort(buf, offset, attrID);
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ClassWriter.setInt(buf, offset + 2, 2);
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ClassWriter.setUShort(buf, offset + 6, index);
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return offset + 8;
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}
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/**
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* Set the index of the constant pool item holding the source file name.
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*/
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public void setSourceFileCPIndex(int index) throws IllegalArgumentException {
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if (index < 1 || index > 0xFFFF) {
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throw new IllegalArgumentException("Invalid CP index: " + index);
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}
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this.index = index;
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}
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} |