| /* |
| Licensed to the Apache Software Foundation (ASF) under one |
| or more contributor license agreements. See the NOTICE file |
| distributed with this work for additional information |
| regarding copyright ownership. The ASF licenses this file |
| to you under the Apache License, Version 2.0 (the |
| "License"); you may not use this file except in compliance |
| with the License. You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, |
| software distributed under the License is distributed on an |
| "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| KIND, either express or implied. See the License for the |
| specific language governing permissions and limitations |
| under the License. |
| */ |
| package org.apache.wiki.search; |
| |
| import org.apache.log4j.Logger; |
| import org.apache.wiki.api.core.Attachment; |
| import org.apache.wiki.api.core.Context; |
| import org.apache.wiki.api.core.Engine; |
| import org.apache.wiki.api.core.Page; |
| import org.apache.wiki.api.exceptions.NoRequiredPropertyException; |
| import org.apache.wiki.api.exceptions.ProviderException; |
| import org.apache.wiki.api.providers.PageProvider; |
| import org.apache.wiki.api.search.QueryItem; |
| import org.apache.wiki.api.search.SearchResult; |
| import org.apache.wiki.attachment.AttachmentManager; |
| import org.apache.wiki.auth.AuthorizationManager; |
| import org.apache.wiki.auth.permissions.PagePermission; |
| import org.apache.wiki.pages.PageManager; |
| |
| import java.io.IOException; |
| import java.util.Collection; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Properties; |
| import java.util.StringTokenizer; |
| import java.util.TreeSet; |
| |
| /** |
| * Interface for the search providers that handle searching the Wiki |
| * |
| * @since 2.2.21. |
| */ |
| public class BasicSearchProvider implements SearchProvider { |
| |
| private static final Logger log = Logger.getLogger( BasicSearchProvider.class ); |
| private Engine m_engine; |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public void initialize( final Engine engine, final Properties props ) throws NoRequiredPropertyException, IOException { |
| m_engine = engine; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public void pageRemoved( final Page page ) {} |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public void reindexPage( final Page page ) {} |
| |
| /** |
| * Parses a query into something that we can use. |
| * |
| * @param query A query string. |
| * @return A parsed array. |
| */ |
| public QueryItem[] parseQuery( final String query) { |
| final StringTokenizer st = new StringTokenizer( query, " \t," ); |
| final QueryItem[] items = new QueryItem[st.countTokens()]; |
| int word = 0; |
| |
| log.debug("Expecting "+items.length+" items"); |
| |
| // Parse incoming search string |
| while( st.hasMoreTokens() ) { |
| log.debug( "Item " + word ); |
| String token = st.nextToken().toLowerCase(); |
| |
| items[ word ] = new QueryItem(); |
| |
| switch( token.charAt( 0 ) ) { |
| case '+': |
| items[ word ].type = QueryItem.REQUIRED; |
| token = token.substring( 1 ); |
| log.debug( "Required word: " + token ); |
| break; |
| |
| case '-': |
| items[ word ].type = QueryItem.FORBIDDEN; |
| token = token.substring( 1 ); |
| log.debug( "Forbidden word: " + token ); |
| break; |
| |
| default: |
| items[ word ].type = QueryItem.REQUESTED; |
| log.debug( "Requested word: " + token ); |
| break; |
| } |
| |
| items[ word++ ].word = token; |
| } |
| |
| return items; |
| } |
| |
| private String attachmentNames( final Page page ) { |
| if( m_engine.getManager( AttachmentManager.class ).hasAttachments( page ) ) { |
| final List< Attachment > attachments; |
| try { |
| attachments = m_engine.getManager( AttachmentManager.class ).listAttachments( page ); |
| } catch( final ProviderException e ) { |
| log.error( "Unable to get attachments for page", e ); |
| return ""; |
| } |
| |
| final StringBuilder attachmentNames = new StringBuilder(); |
| for( final Iterator< Attachment > it = attachments.iterator(); it.hasNext(); ) { |
| final Attachment att = it.next(); |
| attachmentNames.append( att.getName() ); |
| if( it.hasNext() ) { |
| attachmentNames.append( " " ); |
| } |
| } |
| return attachmentNames.toString(); |
| } |
| |
| return ""; |
| } |
| |
| private Collection< SearchResult > findPages( final QueryItem[] query, final Context wikiContext ) { |
| final TreeSet< SearchResult > res = new TreeSet<>( new SearchResultComparator() ); |
| final SearchMatcher matcher = new SearchMatcher( m_engine, query ); |
| final Collection< Page > allPages; |
| try { |
| allPages = m_engine.getManager( PageManager.class ).getAllPages(); |
| } catch( final ProviderException pe ) { |
| log.error( "Unable to retrieve page list", pe ); |
| return null; |
| } |
| |
| final AuthorizationManager mgr = m_engine.getManager( AuthorizationManager.class ); |
| |
| for( final Page page : allPages ) { |
| try { |
| if( page != null ) { |
| final PagePermission pp = new PagePermission( page, PagePermission.VIEW_ACTION ); |
| if( wikiContext == null || mgr.checkPermission( wikiContext.getWikiSession(), pp ) ) { |
| final String pageName = page.getName(); |
| final String pageContent = |
| m_engine.getManager( PageManager.class ).getPageText( pageName, PageProvider.LATEST_VERSION ) + attachmentNames( page ); |
| final SearchResult comparison = matcher.matchPageContent( pageName, pageContent ); |
| if( comparison != null ) { |
| res.add( comparison ); |
| } |
| } |
| } |
| } catch( final ProviderException pe ) { |
| log.error( "Unable to retrieve page from cache", pe ); |
| } catch( final IOException ioe ) { |
| log.error( "Failed to search page", ioe ); |
| } |
| } |
| |
| return res; |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public Collection< SearchResult > findPages( final String query, final Context wikiContext ) { |
| return findPages( parseQuery( query ), wikiContext ); |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public String getProviderInfo() { |
| return "BasicSearchProvider"; |
| } |
| |
| } |