/*******************************************************************************
* Copyright (c) 2013 Jesper Steen Moeller and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Jesper Steen Moeller - initial API and implementation
*******************************************************************************/
package org.eclipse.jdt.internal.core.util;
import org.eclipse.jdt.core.util.ClassFormatException;
import org.eclipse.jdt.core.util.IConstantPool;
import org.eclipse.jdt.core.util.IConstantPoolConstant;
import org.eclipse.jdt.core.util.IConstantPoolEntry;
import org.eclipse.jdt.core.util.IMethodParametersAttribute;
/**
* @since 3.10
*/
public class MethodParametersAttribute extends ClassFileAttribute implements IMethodParametersAttribute {
private static final char[][] NO_NAMES = new char[0][];
private static final short[] NO_ACCES_FLAGS = new short[0];
private final int numberOfEntries;
private final char[][] names;
private final short[] accessFlags;
MethodParametersAttribute(byte[] classFileBytes, IConstantPool constantPool, int offset) throws ClassFormatException {
super(classFileBytes, constantPool, offset);
final int length = u1At(classFileBytes, 6, offset);
this.numberOfEntries = length;
if (length != 0) {
int readOffset = offset + 7;
this.names = new char[length][];
this.accessFlags = new short[length];
for (int i = 0; i < length; i++) {
int nameIndex = u2At(classFileBytes, 0, readOffset);
int mask = u2At(classFileBytes, 2, readOffset);
readOffset += 4;
if (nameIndex != 0) {
IConstantPoolEntry constantPoolEntry = constantPool.decodeEntry(nameIndex);
if (constantPoolEntry.getKind() != IConstantPoolConstant.CONSTANT_Utf8) {
throw new ClassFormatException(ClassFormatException.INVALID_CONSTANT_POOL_ENTRY);
}
this.names[i] = constantPoolEntry.getUtf8Value();
} else {
this.names[i] = null;
}
this.accessFlags[i] = (short) (mask & 0xFFFF);
}
} else {
this.names = NO_NAMES;
this.accessFlags = NO_ACCES_FLAGS;
}
}
/* (non-Javadoc)
* @see org.eclipse.jdt.core.util.IMethodParametersAttribute#getMethodParameterLength()
*/
public int getMethodParameterLength() {
return this.numberOfEntries;
}
/* (non-Javadoc)
* @see org.eclipse.jdt.core.util.IMethodParametersAttribute#getParameterName(int)
*/
public char[] getParameterName(int i) {
return this.names[i];
}
/* (non-Javadoc)
* @see org.eclipse.jdt.core.util.IMethodParametersAttribute#getAccessFlags(int)
*/
public short getAccessFlags(int i) {
return this.accessFlags[i];
}
}