1 /******************************************************************************* 2 * Copyright (c) 2000, 2015 IBM Corporation and others. 3 * 4 * This program and the accompanying materials 5 * are made available under the terms of the Eclipse Public License 2.0 6 * which accompanies this distribution, and is available at 7 * https://www.eclipse.org/legal/epl-2.0/ 8 * 9 * SPDX-License-Identifier: EPL-2.0 10 * 11 * Contributors: 12 * IBM Corporation - initial API and implementation 13 * Andrey Loskutov <loskutov@gmx.de> - bug 484014 14 *******************************************************************************/ 15 package org.eclipse.core.internal.registry; 16 17 import java.lang.ref.SoftReference; 18 import org.eclipse.core.runtime.IContributor; 19 20 /** 21 * An object which represents the user-defined extension in a plug-in manifest. 22 */ 23 public class Extension extends RegistryObject { 24 public static final Extension[] EMPTY_ARRAY = new Extension[0]; 25 26 //Extension simple identifier 27 private String simpleId; 28 //The namespace for the extension. 29 private String namespaceIdentifier; 30 31 // Place holder for the label and the extension point. It contains either a String[] or a SoftReference to a String[]. 32 //The array layout is [label, extension point name] 33 private Object extraInformation; 34 private static final byte LABEL = 0; //The human readable name of the extension 35 private static final byte XPT_NAME = 1; // The fully qualified name of the extension point to which this extension is attached to 36 private static final byte CONTRIBUTOR_ID = 2; // ID of the actual contributor of this extension 37 private static final int EXTRA_SIZE = 3; 38 Extension(ExtensionRegistry registry, boolean persist)39 protected Extension(ExtensionRegistry registry, boolean persist) { 40 super(registry, persist); 41 } 42 Extension(int self, String simpleId, String namespace, int[] children, int extraData, ExtensionRegistry registry, boolean persist)43 protected Extension(int self, String simpleId, String namespace, int[] children, int extraData, ExtensionRegistry registry, boolean persist) { 44 super(registry, persist); 45 46 setObjectId(self); 47 this.simpleId = simpleId; 48 setRawChildren(children); 49 setExtraDataOffset(extraData); 50 this.namespaceIdentifier = namespace; 51 } 52 getExtensionPointIdentifier()53 protected String getExtensionPointIdentifier() { 54 String[] extraData = getExtraData(); 55 if (extraData == null) { 56 return null; 57 } 58 return extraData[XPT_NAME]; 59 } 60 getSimpleIdentifier()61 protected String getSimpleIdentifier() { 62 return simpleId; 63 } 64 getUniqueIdentifier()65 protected String getUniqueIdentifier() { 66 return simpleId == null ? null : this.getNamespaceIdentifier() + '.' + simpleId; 67 } 68 setExtensionPointIdentifier(String value)69 void setExtensionPointIdentifier(String value) { 70 ensureExtraInformationType(); 71 ((String[]) extraInformation)[XPT_NAME] = value; 72 } 73 setSimpleIdentifier(String value)74 void setSimpleIdentifier(String value) { 75 simpleId = value; 76 } 77 getExtraData()78 private String[] getExtraData() { 79 //The extension has been created by parsing, or does not have any extra data 80 if (noExtraData()) { 81 if (extraInformation != null) 82 return (String[]) extraInformation; 83 return null; 84 } 85 86 //The extension has been loaded from the cache. 87 String[] result = null; 88 if (extraInformation == null || (result = ((extraInformation instanceof SoftReference) ? (String[]) ((SoftReference<?>) extraInformation).get() : (String[]) extraInformation)) == null) { 89 result = registry.getTableReader().loadExtensionExtraData(getExtraDataOffset()); 90 extraInformation = new SoftReference<>(result); 91 } 92 return result; 93 } 94 getLabel()95 String getLabel() { 96 String s = getExtraData()[LABEL]; 97 if (s == null) 98 return ""; //$NON-NLS-1$ 99 return s; 100 } 101 setLabel(String value)102 void setLabel(String value) { 103 ensureExtraInformationType(); 104 ((String[]) extraInformation)[LABEL] = value; 105 } 106 getContributorId()107 String getContributorId() { 108 String s = getExtraData()[CONTRIBUTOR_ID]; 109 if (s == null) 110 return ""; //$NON-NLS-1$ 111 return s; 112 } 113 getContributor()114 public IContributor getContributor() { 115 return registry.getObjectManager().getContributor(getContributorId()); 116 } 117 setContributorId(String value)118 void setContributorId(String value) { 119 ensureExtraInformationType(); 120 ((String[]) extraInformation)[CONTRIBUTOR_ID] = value; 121 } 122 getNamespaceIdentifier()123 public String getNamespaceIdentifier() { 124 return namespaceIdentifier; 125 } 126 setNamespaceIdentifier(String value)127 void setNamespaceIdentifier(String value) { 128 namespaceIdentifier = value; 129 } 130 131 @Override toString()132 public String toString() { 133 return getUniqueIdentifier() + " -> " + getExtensionPointIdentifier(); //$NON-NLS-1$ 134 } 135 136 /** 137 * At the end of this method, extra information will be a string[] 138 */ ensureExtraInformationType()139 private void ensureExtraInformationType() { 140 if (extraInformation instanceof SoftReference) { 141 extraInformation = ((SoftReference<?>) extraInformation).get(); 142 } 143 if (extraInformation == null) { 144 extraInformation = new String[EXTRA_SIZE]; 145 } 146 } 147 getLabelAsIs()148 String getLabelAsIs() { 149 String s = getExtraData()[LABEL]; 150 if (s == null) 151 return ""; //$NON-NLS-1$ 152 return s; 153 } 154 getLabel(String locale)155 String getLabel(String locale) { 156 registry.logMultiLangError(); 157 return getLabel(); 158 } 159 160 } 161