org.eclipse.jdt.internal.core.util.PermittedSubclassesAttribute Maven / Gradle / Ivy
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/*******************************************************************************
* Copyright (c) 2020 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - 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.IPermittedSubclassesAttributeEntry;
import org.eclipse.jdt.core.util.IPermittedSubclassesAttribute;
/**
* Default implementation of IPermittedSubclassesAttribute.
*/
public class PermittedSubclassesAttribute extends ClassFileAttribute implements IPermittedSubclassesAttribute {
private static final IPermittedSubclassesAttributeEntry[] NO_ENTRIES = new IPermittedSubclassesAttributeEntry[0];
private final int permittedSubclasses;
private IPermittedSubclassesAttributeEntry[] entries;
/**
* Constructor for PermittedSubclassesAttribute.
*/
public PermittedSubclassesAttribute(
byte[] classFileBytes,
IConstantPool constantPool,
int offset)
throws ClassFormatException {
super(classFileBytes, constantPool, offset);
this.permittedSubclasses = u2At(classFileBytes, 6, offset);
final int length = this.permittedSubclasses;
if (length != 0) {
int readOffset = 8;
this.entries = new IPermittedSubclassesAttributeEntry[length];
for (int i = 0; i < length; i++) {
this.entries[i] = new PermittedSubclassesAttributeEntry(classFileBytes, constantPool, offset + readOffset);
readOffset += 2;
}
} else {
this.entries = NO_ENTRIES;
}
}
@Override
public int getNumberOfPermittedSubclasses() {
return this.permittedSubclasses;
}
@Override
public IPermittedSubclassesAttributeEntry[] getPermittedSubclassAttributesEntries() {
return this.entries;
}
}