| 1 | /******************************************************************************* |
| 2 | * Copyright (c) 2007, 2008 IBM Corporation and others. |
| 3 | * All rights reserved. This program and the accompanying materials |
| 4 | * are made available under the terms of the Eclipse Public License v1.0 |
| 5 | * which accompanies this distribution, and is available at |
| 6 | * http://www.eclipse.org/legal/epl-v10.html |
| 7 | * |
| 8 | * Contributors: |
| 9 | * IBM Corporation - initial API and implementation |
| 10 | *******************************************************************************/ |
| 11 | package org.eclipse.pde.api.tools.internal; |
| 12 | |
| 13 | import java.util.ArrayList; |
| 14 | import java.util.Collection; |
| 15 | import java.util.HashMap; |
| 16 | import java.util.HashSet; |
| 17 | import java.util.List; |
| 18 | import java.util.Set; |
| 19 | |
| 20 | import org.eclipse.pde.api.tools.internal.provisional.IApiJavadocTag; |
| 21 | import org.eclipse.pde.api.tools.internal.provisional.RestrictionModifiers; |
| 22 | |
| 23 | /** |
| 24 | * Manages contributed javadoc tags. This manager is lazy, in that |
| 25 | * nothing is loaded until it is asked for. |
| 26 | * |
| 27 | * @since 1.0.0 |
| 28 | */ |
| 29 | public final class JavadocTagManager { |
| 30 | |
| 31 | /** |
| 32 | * Cache for the contributed javadoc tags. |
| 33 | * Cache form: |
| 34 | * <pre> |
| 35 | * HashMap<String(id), tag> |
| 36 | * </pre> |
| 37 | */ |
| 38 | private HashMap tagcache = null; |
| 39 | |
| 40 | /** |
| 41 | * Collection of tag extensions |
| 42 | */ |
| 43 | private IApiJavadocTag[] tags; |
| 44 | |
| 45 | /** |
| 46 | * Initializes the cache of contributed Javadoc tags. |
| 47 | * If the cache has already been initialized no work is done. |
| 48 | */ |
| 49 | private void initializeJavadocTags() { |
| 50 | if(tagcache == null) { |
| 51 | tagcache = new HashMap(); |
| 52 | List list = new ArrayList(4); |
| 53 | |
| 54 | //noimplement tag |
| 55 | ApiJavadocTag newtag = new ApiJavadocTag(IApiJavadocTag.NO_IMPLEMENT_TAG_ID, |
| 56 | "noimplement", //$NON-NLS-1$ |
| 57 | RestrictionModifiers.NO_IMPLEMENT); |
| 58 | newtag.setApplicableTo(IApiJavadocTag.TYPE_INTERFACE, |
| 59 | IApiJavadocTag.MEMBER_NONE, |
| 60 | "This interface is not intended to be implemented by clients."); //$NON-NLS-1$ |
| 61 | tagcache.put(newtag.getTagId(), newtag); |
| 62 | list.add(newtag); |
| 63 | |
| 64 | //noextend tag |
| 65 | newtag = new ApiJavadocTag(IApiJavadocTag.NO_EXTEND_TAG_ID, |
| 66 | "noextend", //$NON-NLS-1$ |
| 67 | RestrictionModifiers.NO_EXTEND); |
| 68 | newtag.setApplicableTo(IApiJavadocTag.TYPE_CLASS, |
| 69 | IApiJavadocTag.MEMBER_NONE, |
| 70 | "This class is not intended to be subclassed by clients."); //$NON-NLS-1$ |
| 71 | newtag.setApplicableTo(IApiJavadocTag.TYPE_INTERFACE, |
| 72 | IApiJavadocTag.MEMBER_NONE, |
| 73 | "This interface is not intended to be extended by clients."); //$NON-NLS-1$ |
| 74 | tagcache.put(newtag.getTagId(), newtag); |
| 75 | list.add(newtag); |
| 76 | |
| 77 | //nooverride tag |
| 78 | newtag = new ApiJavadocTag(IApiJavadocTag.NO_OVERRIDE_TAG_ID, |
| 79 | "nooverride", //$NON-NLS-1$ |
| 80 | RestrictionModifiers.NO_OVERRIDE); |
| 81 | newtag.setApplicableTo(IApiJavadocTag.TYPE_CLASS, |
| 82 | IApiJavadocTag.MEMBER_METHOD, |
| 83 | "This method is not intended to be re-implemented or extended by clients."); //$NON-NLS-1$ |
| 84 | tagcache.put(newtag.getTagId(), newtag); |
| 85 | list.add(newtag); |
| 86 | |
| 87 | //noinstantiate tag |
| 88 | newtag = new ApiJavadocTag(IApiJavadocTag.NO_INSTANTIATE_TAG_ID, |
| 89 | "noinstantiate", //$NON-NLS-1$ |
| 90 | RestrictionModifiers.NO_INSTANTIATE); |
| 91 | newtag.setApplicableTo(IApiJavadocTag.TYPE_CLASS, |
| 92 | IApiJavadocTag.MEMBER_NONE, |
| 93 | "This class is not intended to be instantiated by clients."); //$NON-NLS-1$ |
| 94 | tagcache.put(newtag.getTagId(), newtag); |
| 95 | list.add(newtag); |
| 96 | |
| 97 | //noreference tag |
| 98 | newtag = new ApiJavadocTag(IApiJavadocTag.NO_REFERENCE_TAG_ID, |
| 99 | "noreference", //$NON-NLS-1$ |
| 100 | RestrictionModifiers.NO_REFERENCE); |
| 101 | newtag.setApplicableTo(IApiJavadocTag.TYPE_CLASS, |
| 102 | IApiJavadocTag.MEMBER_METHOD, |
| 103 | "This method is not intended to be referenced by clients."); //$NON-NLS-1$ |
| 104 | newtag.setApplicableTo(IApiJavadocTag.TYPE_INTERFACE, |
| 105 | IApiJavadocTag.MEMBER_METHOD, |
| 106 | "This method is not intended to be referenced by clients."); //$NON-NLS-1$ |
| 107 | newtag.setApplicableTo(IApiJavadocTag.TYPE_CLASS, |
| 108 | IApiJavadocTag.MEMBER_FIELD, |
| 109 | "This field is not intended to be referenced by clients."); //$NON-NLS-1$ |
| 110 | newtag.setApplicableTo(IApiJavadocTag.TYPE_INTERFACE, |
| 111 | IApiJavadocTag.MEMBER_FIELD, |
| 112 | "This field is not intended to be referenced by clients."); //$NON-NLS-1$ |
| 113 | newtag.setApplicableTo(IApiJavadocTag.TYPE_CLASS, |
| 114 | IApiJavadocTag.MEMBER_CONSTRUCTOR, |
| 115 | "This constructor is not intended to be referenced by clients."); //$NON-NLS-1$ |
| 116 | newtag.setApplicableTo(IApiJavadocTag.TYPE_ENUM, |
| 117 | IApiJavadocTag.MEMBER_FIELD, |
| 118 | "This enum field is not intended to be referenced by clients."); //$NON-NLS-1$ |
| 119 | newtag.setApplicableTo(IApiJavadocTag.TYPE_ENUM, |
| 120 | IApiJavadocTag.MEMBER_METHOD, |
| 121 | "This enum method is not intended to be referenced by clients."); //$NON-NLS-1$ |
| 122 | tagcache.put(newtag.getTagId(), newtag); |
| 123 | list.add(newtag); |
| 124 | tags = (IApiJavadocTag[]) list.toArray(new IApiJavadocTag[list.size()]); |
| 125 | } |
| 126 | } |
| 127 | |
| 128 | /** |
| 129 | * Returns all of the java doc tags for a given kind of type and member. See |
| 130 | * {@link IApiJavadocTag} for a complete listing of tag Java type and member types. |
| 131 | * |
| 132 | * @param type one of <code>CLASS</code> or <code>INTERFACE</code> |
| 133 | * @param member one of <code>METHOD</code> or <code>FIELD</code> or <code>NONE</code> |
| 134 | * @return an array of {@link IApiJavadocTag}s that apply to the specified |
| 135 | * Java type or an empty array, never <code>null</code> |
| 136 | */ |
| 137 | public synchronized IApiJavadocTag[] getTagsForType(int type, int member) { |
| 138 | initializeJavadocTags(); |
| 139 | List list = new ArrayList(); |
| 140 | for (int i = 0; i < tags.length; i++) { |
| 141 | if (tags[i].isApplicable(type, member)) { |
| 142 | list.add(tags[i]); |
| 143 | } |
| 144 | } |
| 145 | return (IApiJavadocTag[]) list.toArray(new IApiJavadocTag[list.size()]); |
| 146 | } |
| 147 | |
| 148 | /** |
| 149 | * Returns the {@link IApiJavadocTag} that has the given id or <code>null</code> if there is |
| 150 | * no tag with the given id |
| 151 | * @param id the id of the tag to fetch |
| 152 | * @return the {@link IApiJavadocTag} with the given id or <code>null</code> |
| 153 | */ |
| 154 | public synchronized IApiJavadocTag getTag(String id) { |
| 155 | initializeJavadocTags(); |
| 156 | return (IApiJavadocTag) tagcache.get(id); |
| 157 | } |
| 158 | |
| 159 | /** |
| 160 | * Returns the complete listing of {@link IApiJavadocTag}s contained in the manager or an empty |
| 161 | * array, never <code>null</code> |
| 162 | * @return the complete listing of tags in the manager or <code>null</code> |
| 163 | */ |
| 164 | public synchronized IApiJavadocTag[] getAllTags() { |
| 165 | initializeJavadocTags(); |
| 166 | if(tagcache == null) { |
| 167 | return new IApiJavadocTag[0]; |
| 168 | } |
| 169 | Collection values = tagcache.values(); |
| 170 | return (IApiJavadocTag[]) values.toArray(new IApiJavadocTag[values.size()]); |
| 171 | } |
| 172 | |
| 173 | /** |
| 174 | * @return The complete set of tags names that this manager currently knows about. |
| 175 | */ |
| 176 | public synchronized Set getAllTagNames() { |
| 177 | IApiJavadocTag[] tags = getAllTags(); |
| 178 | HashSet names = new HashSet(tags.length); |
| 179 | for(int i = 0; i < tags.length; i++) { |
| 180 | names.add(tags[i].getTagName()); |
| 181 | } |
| 182 | return names; |
| 183 | } |
| 184 | |
| 185 | /** |
| 186 | * Returns the restriction modifier set on the javadoc tag with the given name. |
| 187 | * If the manager has no entry for the specified tag name <code>-1</code> is returned. |
| 188 | * |
| 189 | * @param tagname the name of the tag |
| 190 | * @param type one of <code>CLASS</code> or <code>INTERFACE</code> |
| 191 | * @param member one of <code>METHOD</code> or <code>FIELD</code> or <code>NONE</code> |
| 192 | * @return the restriction modifier for the given tag name or {@link RestrictionModifiers#NO_RESTRICTIONS} if not found |
| 193 | */ |
| 194 | public synchronized int getRestrictionsForTag(String tagname, int type, int member) { |
| 195 | if(tagname == null) { |
| 196 | return RestrictionModifiers.NO_RESTRICTIONS; |
| 197 | } |
| 198 | initializeJavadocTags(); |
| 199 | ApiJavadocTag tag = null; |
| 200 | for (int i = 0; i < tags.length; i++) { |
| 201 | tag = (ApiJavadocTag) tags[i]; |
| 202 | if (tag.getTagName().equals(tagname) && (tag.isApplicable(type, member))) { |
| 203 | return tag.getRestrictionModifier(); |
| 204 | } |
| 205 | } |
| 206 | return RestrictionModifiers.NO_RESTRICTIONS; |
| 207 | } |
| 208 | } |