| /******************************************************************************* |
| * Copyright (c) 2000, 2009 IBM Corporation 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: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.core.internal.registry; |
| |
| import java.io.File; |
| import java.lang.ref.SoftReference; |
| import org.eclipse.core.runtime.IContributor; |
| |
| /** |
| * An object which represents the user-defined extension point in a |
| * plug-in manifest. |
| */ |
| public class ExtensionPoint extends RegistryObject { |
| public static final ExtensionPoint[] EMPTY_ARRAY = new ExtensionPoint[0]; |
| |
| //Place holder for the label and the schema. It contains either a String[] or a SoftReference to a String[]. |
| //The array layout is [label, schemaReference, fullyQualifiedName, namespace, contributorId] |
| private Object extraInformation; |
| //Indexes of the various fields |
| private static final byte LABEL = 0; //The human readable name for the extension point |
| private static final byte SCHEMA = 1; //The schema of the extension point |
| private static final byte QUALIFIED_NAME = 2; //The fully qualified name of the extension point |
| private static final byte NAMESPACE = 3; //The name of the namespace of the extension point |
| private static final byte CONTRIBUTOR_ID = 4; //The ID of the actual contributor of the extension point |
| private static final int EXTRA_SIZE = 5; |
| |
| protected ExtensionPoint(ExtensionRegistry registry, boolean persist) { |
| super(registry, persist); |
| } |
| |
| protected ExtensionPoint(int self, int[] children, int dataOffset, ExtensionRegistry registry, boolean persist) { |
| super(registry, persist); |
| |
| setObjectId(self); |
| setRawChildren(children); |
| setExtraDataOffset(dataOffset); |
| } |
| |
| protected String getSimpleIdentifier() { |
| return getUniqueIdentifier().substring(getUniqueIdentifier().lastIndexOf('.') + 1); |
| } |
| |
| private String[] getExtraData() { |
| //The extension point has been created by parsing, or does not have any extra data |
| if (noExtraData()) { //When this is true, the extraInformation is always a String[]. This happens when the object is created by the parser. |
| if (extraInformation != null) |
| return (String[]) extraInformation; |
| return new String[EXTRA_SIZE]; |
| } |
| |
| //The extension point has been loaded from the cache. |
| String[] result = null; |
| if (extraInformation == null || (result = ((extraInformation instanceof SoftReference) ? (String[]) ((SoftReference) extraInformation).get() : (String[]) extraInformation)) == null) { |
| result = registry.getTableReader().loadExtensionPointExtraData(getExtraDataOffset()); |
| extraInformation = new SoftReference(result); |
| } |
| return result; |
| } |
| |
| /** |
| * At the end of this method, extra information will be a string[] |
| */ |
| private void ensureExtraInformationType() { |
| if (extraInformation instanceof SoftReference) { |
| extraInformation = ((SoftReference) extraInformation).get(); |
| } |
| if (extraInformation == null) { |
| extraInformation = new String[EXTRA_SIZE]; |
| } |
| } |
| |
| protected String getSchemaReference() { |
| String[] result = getExtraData(); |
| return result[1] == null ? "" : result[SCHEMA].replace(File.separatorChar, '/'); //$NON-NLS-1$ |
| } |
| |
| protected String getLabel() { |
| String[] result = getExtraData(); |
| return result[0] == null ? "" : result[LABEL]; //$NON-NLS-1$ |
| } |
| |
| protected String getUniqueIdentifier() { |
| return getExtraData()[QUALIFIED_NAME]; |
| } |
| |
| public String getNamespace() { |
| return getExtraData()[NAMESPACE]; |
| } |
| |
| protected String getContributorId() { |
| return getExtraData()[CONTRIBUTOR_ID]; |
| } |
| |
| public IContributor getContributor() { |
| return registry.getObjectManager().getContributor(getContributorId()); |
| } |
| |
| void setSchema(String value) { |
| ensureExtraInformationType(); |
| ((String[]) extraInformation)[SCHEMA] = value; |
| } |
| |
| void setLabel(String value) { |
| ensureExtraInformationType(); |
| ((String[]) extraInformation)[LABEL] = value; |
| } |
| |
| void setUniqueIdentifier(String value) { |
| ensureExtraInformationType(); |
| ((String[]) extraInformation)[QUALIFIED_NAME] = value; |
| } |
| |
| void setNamespace(String value) { |
| ensureExtraInformationType(); |
| ((String[]) extraInformation)[NAMESPACE] = value; |
| } |
| |
| void setContributorId(String id) { |
| ensureExtraInformationType(); |
| ((String[]) extraInformation)[CONTRIBUTOR_ID] = id; |
| } |
| |
| public String toString() { |
| return getUniqueIdentifier(); |
| } |
| |
| protected String getLabelAsIs() { |
| String[] result = getExtraData(); |
| return result[0] == null ? "" : result[LABEL]; //$NON-NLS-1$ |
| } |
| |
| protected String getLabel(String locale) { |
| registry.logMultiLangError(); |
| return getLabel(); |
| } |
| |
| } |