84 lines
2.6 KiB
Java
84 lines
2.6 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 InnerClasses attributes.
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*/
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public final class InnerClassesWriter extends ClassWriter.Element {
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final private int attrID;
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private int[] table;
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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 InnerClassesWriter(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("InnerClasses");
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}
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@Override
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public int getSize() {
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return table == null ? 8 : 8 + table.length * 2;
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}
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/**
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* Copy the bytes into 'buf' at offset 'offset'.
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*
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* @return the number of bytes copies, which must be equal to getSize()
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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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ClassWriter.setUShort(buf, offset, attrID);
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ClassWriter.setInt(buf, offset + 2, getSize() - 6);
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ClassWriter.setUShort(buf, offset + 6, table == null ? 0 : table.length);
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offset += 8;
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if (table != null) {
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for (int i = 0; i < table.length; i++) {
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ClassWriter.setUShort(buf, offset, table[i]);
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offset += 2;
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}
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}
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return offset;
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}
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/**
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* Set the raw values that make up this attribute
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*
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* @throws IllegalArgumentException if classes is null
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*/
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public void setRawTable(int[] classes) throws NullPointerException {
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if (classes == null) {
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throw new IllegalArgumentException("classes is null");
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}
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if (classes.length % 4 != 0) {
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throw new IllegalArgumentException("Invalid raw table length: " + classes.length);
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}
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for (int i = 0; i < classes.length; i += 4) {
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if (classes[i] < 1 || classes[i] > 0xFFFF) {
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throw new IllegalArgumentException("Invalid CP index: " + classes[i]);
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}
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if (classes[i + 1] < 0 || classes[i + 1] > 0xFFFF) {
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throw new IllegalArgumentException("Invalid CP index: " + classes[i]);
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}
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if (classes[i + 2] < 0 || classes[i + 2] > 0xFFFF) {
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throw new IllegalArgumentException("Invalid CP index: " + classes[i]);
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}
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}
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this.table = classes;
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}
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} |