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AspectJ tools most notably contains the AspectJ compiler (AJC). AJC applies aspects to Java classes during
compilation, fully replacing Javac for plain Java classes and also compiling native AspectJ or annotation-based
@AspectJ syntax. Furthermore, AJC can weave aspects into existing class files in a post-compile binary weaving step.
This library is a superset of AspectJ weaver and hence also of AspectJ runtime.
/*******************************************************************************
* Copyright (c) 2004, 2006 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.core.internal.registry;
import org.eclipse.core.runtime.Assert;
import org.eclipse.core.runtime.InvalidRegistryObjectException;
// This object is used to keep track on a contributor basis of the extension and extension points being contributed.
// It is mainly used on removal so we can quickly find objects to remove.
// Each contribution is made in the context of a namespace.
public class Contribution implements KeyedElement {
static final int[] EMPTY_CHILDREN = new int[] {0, 0};
//The registry that owns this object
protected ExtensionRegistry registry;
// The actual contributor of the contribution
final protected String contributorId;
// Value is derived from the contributorId and cached for performance
private String defaultNamespace = null;
// indicates if this contribution needs to be saved in the registry cache
protected boolean persist;
// This array stores the identifiers of both the extension points and the extensions.
// The array has always a minimum size of 2.
// The first element of the array is the number of extension points and the second the number of extensions.
// [numberOfExtensionPoints, numberOfExtensions, extensionPoint#1, extensionPoint#2, extensionPoint..., ext#1, ext#2, ext#3, ... ].
// The size of the array is 2 + (numberOfExtensionPoints + numberOfExtensions).
private int[] children = EMPTY_CHILDREN;
static final public byte EXTENSION_POINT = 0;
static final public byte EXTENSION = 1;
protected Contribution(String contributorId, ExtensionRegistry registry, boolean persist) {
this.contributorId = contributorId;
this.registry = registry;
this.persist = persist;
}
void mergeContribution(Contribution addContribution) {
Assert.isTrue(contributorId.equals(addContribution.contributorId));
Assert.isTrue(registry == addContribution.registry);
// persist?
// Old New Result
// F F F
// F T T => needs to be adjusted
// T F T
// T T T
if (shouldPersist() != addContribution.shouldPersist())
persist = true;
int[] existing = getRawChildren();
int[] addition = addContribution.getRawChildren();
int extensionPoints = existing[EXTENSION_POINT] + addition[EXTENSION_POINT];
int extensions = existing[EXTENSION] + addition[EXTENSION];
int[] allChildren = new int[2 + extensionPoints + extensions];
allChildren[EXTENSION_POINT] = extensionPoints;
System.arraycopy(existing, 2, allChildren, 2, existing[EXTENSION_POINT]);
System.arraycopy(addition, 2, allChildren, 2 + existing[EXTENSION_POINT], addition[EXTENSION_POINT]);
allChildren[EXTENSION] = extensions;
System.arraycopy(existing, 2 + existing[EXTENSION_POINT], allChildren, 2 + extensionPoints, existing[EXTENSION]);
System.arraycopy(addition, 2 + addition[EXTENSION_POINT], allChildren, 2 + extensionPoints + existing[EXTENSION], addition[EXTENSION]);
children = allChildren;
}
void setRawChildren(int[] children) {
this.children = children;
}
protected String getContributorId() {
return contributorId;
}
protected int[] getRawChildren() {
return children;
}
protected int[] getExtensions() {
int[] results = new int[children[EXTENSION]];
System.arraycopy(children, 2 + children[EXTENSION_POINT], results, 0, children[EXTENSION]);
return results;
}
protected int[] getExtensionPoints() {
int[] results = new int[children[EXTENSION_POINT]];
System.arraycopy(children, 2, results, 0, children[EXTENSION_POINT]);
return results;
}
public String getDefaultNamespace() {
if (defaultNamespace == null)
defaultNamespace = registry.getObjectManager().getContributor(contributorId).getName();
return defaultNamespace;
}
@Override
public String toString() {
return "Contribution: " + contributorId + " in namespace" + getDefaultNamespace(); //$NON-NLS-1$ //$NON-NLS-2$
}
//Implements the KeyedElement interface
@Override
public int getKeyHashCode() {
return getKey().hashCode();
}
@Override
public Object getKey() {
return contributorId;
}
@Override
public boolean compare(KeyedElement other) {
return contributorId.equals(((Contribution) other).contributorId);
}
public boolean shouldPersist() {
return persist;
}
public void unlinkChild(int id) {
// find index of the child being unlinked:
int index = -1;
for (int i = 2; i < children.length; i++) {
if (children[i] == id) {
index = i;
break;
}
}
if (index == -1)
throw new InvalidRegistryObjectException();
// copy all array except one element at index
int[] result = new int[children.length - 1];
System.arraycopy(children, 0, result, 0, index);
System.arraycopy(children, index + 1, result, index, children.length - index - 1);
// fix sizes
if (index < children[EXTENSION_POINT] + 2)
result[EXTENSION_POINT]--;
else
result[EXTENSION]--;
children = result;
}
/**
* Contribution is empty if it has no children.
*/
public boolean isEmpty() {
return (children[EXTENSION_POINT] == 0 || children[EXTENSION] == 0);
}
/**
* Find if this contribution has a children with ID = id.
* @param id possible ID of the child
* @return true: contribution has this child
*/
public boolean hasChild(int id) {
for (int i = 2; i < children.length; i++) {
if (children[i] == id)
return true;
}
return false;
}
}