251 lines
8.0 KiB
Java
251 lines
8.0 KiB
Java
/*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* (the "License"); you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at <http://www.mozilla.org/MPL/>.
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*
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* Software distributed under the License is distributed on an "AS IS" basis, WITHOUT
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* WARRANTY OF ANY KIND, either express or implied. See the License for the specific
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* language governing rights and limitations under the License.
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*
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* The Original Code is the Venice Web Communities System.
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*
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* The Initial Developer of the Original Code is Eric J. Bowersox <erbo@silcom.com>,
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* for Silverwrist Design Studios. Portions created by Eric J. Bowersox are
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* Copyright (C) 2003 Eric J. Bowersox/Silverwrist Design Studios. All Rights Reserved.
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*
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* Contributor(s):
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*/
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package com.silverwrist.dynamo.dict;
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import java.util.*;
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import org.apache.log4j.Logger;
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import org.w3c.dom.*;
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import com.silverwrist.util.xml.*;
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import com.silverwrist.dynamo.except.*;
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import com.silverwrist.dynamo.iface.*;
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import com.silverwrist.dynamo.util.*;
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public class DatabaseDictionary
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implements NamedObject, ComponentInitialize, ComponentShutdown, DynamoModifiableDictionary
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{
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/*--------------------------------------------------------------------------------
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* Static data members
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*--------------------------------------------------------------------------------
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*/
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private static Logger logger = Logger.getLogger(DatabaseDictionary.class);
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/*--------------------------------------------------------------------------------
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* Attributes
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*--------------------------------------------------------------------------------
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*/
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private String m_name; // name of this object
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private DatabaseDictOps m_ops; // database operations object
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private int m_cache_size = -1; // cached size
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private WeakHashMap m_cache_yes; // words in dictionary
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private WeakHashMap m_cache_no; // words not in dictionary
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/*--------------------------------------------------------------------------------
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* Constructor
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*--------------------------------------------------------------------------------
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*/
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public DatabaseDictionary()
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{
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m_cache_yes = new WeakHashMap();
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m_cache_no = new WeakHashMap();
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} // end constructor
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/*--------------------------------------------------------------------------------
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* Implementations from interface NamedObject
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*--------------------------------------------------------------------------------
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*/
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public String getName()
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{
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return m_name;
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} // end getName
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/*--------------------------------------------------------------------------------
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* Implementations from interface ComponentInitialize
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*--------------------------------------------------------------------------------
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*/
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/**
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* Initialize the component.
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*
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* @param config_root Pointer to the section of the Dynamo XML configuration file that configures this
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* particular component. This is to be considered "read-only" by the component.
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* @param services An implementation of {@link com.silverwrist.dynamo.iface.ServiceProvider ServiceProvider}
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* which provides initialization services to the component. This will include an implementation
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* of {@link com.silverwrist.dynamo.iface.ObjectProvider ObjectProvider} which may be used to
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* get information about other objects previously initialized by the application.
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* @exception com.silverwrist.dynamo.except.ConfigException If an error is encountered in the component
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* configuration.
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*/
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public void initialize(Element config_root, ServiceProvider services) throws ConfigException
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{
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XMLLoader loader = XMLLoader.get();
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String conn_name = null;
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try
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{ // verify the right node name
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loader.verifyNodeName(config_root,"dictionary");
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// get the object's name
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m_name = loader.getAttribute(config_root,"name");
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// get the database configuration connection
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DOMElementHelper config_root_h = new DOMElementHelper(config_root);
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Element elt = loader.getSubElement(config_root_h,"database");
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conn_name = loader.getAttribute(elt,"connection");
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} // end try
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catch (XMLLoadException e)
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{ // error loading XML config data
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throw new ConfigException(e);
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} // end catch
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// Get the database connection pool.
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DBConnectionPool pool = GetObjectUtils.getDatabaseConnection(services,conn_name);
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// Get the operations object.
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m_ops = DatabaseDictOps.get(pool);
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} // end initialize
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/*--------------------------------------------------------------------------------
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* Implementations from interface ComponentShutdown
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*--------------------------------------------------------------------------------
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*/
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public void shutdown()
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{
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m_ops.dispose();
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m_ops = null;
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} // end shutdown
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/*--------------------------------------------------------------------------------
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* Implementations from interface DynamoDictionary
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*--------------------------------------------------------------------------------
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*/
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public synchronized int size()
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{
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if (m_cache_size<0)
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{ // need to get the dictionary size
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try
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{ // get the size from the database
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m_cache_size = m_ops.getSize();
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} // end try
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catch (DatabaseException e)
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{ // whoops! error
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logger.warn("DatabaseDictionary.size(): database error",e);
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m_cache_size = -1;
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} // end catch
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} // end if
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return m_cache_size;
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} // end size
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public synchronized boolean check(String word)
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{
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String real_word = word.toLowerCase();
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if (m_cache_yes.containsKey(real_word))
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return true;
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else if (m_cache_no.containsKey(real_word))
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return false;
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boolean rc = false;
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try
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{ // check the database, stash result in cache
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rc = m_ops.checkWord(real_word);
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if (rc)
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m_cache_yes.put(real_word,Boolean.TRUE);
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else
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m_cache_no.put(real_word,Boolean.FALSE);
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} // end try
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catch (DatabaseException e)
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{ // database error
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logger.warn("DatabaseDictionary.check(): database error",e);
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rc = false;
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} // end catch
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return rc;
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} // end check
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/*--------------------------------------------------------------------------------
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* Implementations from interface DynamoModifiableDictionary
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*--------------------------------------------------------------------------------
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*/
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public synchronized void add(String word) throws DictionaryException
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{
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String real_word = word.toLowerCase();
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try
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{ // add to the dictionary
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boolean added = m_ops.addWord(real_word);
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if (added && (m_cache_size>=0))
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m_cache_size++;
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m_cache_yes.put(real_word,Boolean.TRUE);
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m_cache_no.remove(real_word);
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} // end try
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catch (DatabaseException de)
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{ // error adding to the database
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throw new DictionaryException(DatabaseDictionary.class,"DatabaseDictionaryMessages","add.failed",de);
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} // end catch
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} // end add
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public void remove(String word) throws DictionaryException
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{
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String real_word = word.toLowerCase();
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try
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{ // add to the dictionary
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boolean removed = m_ops.removeWord(real_word);
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if (removed && (m_cache_size>=0))
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m_cache_size--;
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m_cache_no.put(real_word,Boolean.FALSE);
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m_cache_yes.remove(real_word);
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} // end try
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catch (DatabaseException de)
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{ // error adding to the database
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throw new DictionaryException(DatabaseDictionary.class,"DatabaseDictionaryMessages","remove.failed",de);
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} // end catch
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} // end remove
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public void clear() throws DictionaryException
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{
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try
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{ // zap it
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m_ops.clearDictionary();
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m_cache_size = 0;
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m_cache_yes.clear();
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} // end try
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catch (DatabaseException de)
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{ // error adding to the database
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throw new DictionaryException(DatabaseDictionary.class,"DatabaseDictionaryMessages","clear.failed",de);
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} // end catch
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} // end clear
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} // end class DatabaseDictionary
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