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Eric J. Bowersox
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/*
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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.db;
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import java.security.Principal;
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import java.util.*;
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import org.w3c.dom.*;
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import com.silverwrist.util.image.*;
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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 ImageStoreObject implements NamedObject, ComponentInitialize, ComponentShutdown, ImageStore
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{
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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; // object name
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private NamespaceCache m_ns_cache; // namespace cache object
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private ImageStoreOps m_ops; // image store operations
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private Hashtable m_imagetype_tlb = new Hashtable(); // translates imagetypes
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private Hashtable m_imagetype_rev_tlb = new Hashtable(); // translates imagetypes
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/*--------------------------------------------------------------------------------
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* Constructor
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*--------------------------------------------------------------------------------
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*/
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public ImageStoreObject()
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{ // do nothing
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} // end constructor
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/*--------------------------------------------------------------------------------
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* Internal operations
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*--------------------------------------------------------------------------------
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*/
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private final int imageTypeToIndex(PropertyKey pkey) throws DatabaseException
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{
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Integer foo = (Integer)(m_imagetype_tlb.get(pkey));
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if (foo!=null)
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return foo.intValue();
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int rc = m_ops.imageTypeToIndex(pkey);
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foo = new Integer(rc);
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m_imagetype_tlb.put(pkey,foo);
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m_imagetype_rev_tlb.put(foo,pkey);
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return rc;
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} // end imageTypeToIndex
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private final int imageTypeToIndex(int nsid, String name) throws DatabaseException
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{
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return imageTypeToIndex(new PropertyKey(nsid,name));
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} // end imageTypeToIndex
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private final int imageTypeToIndex(String namespace, String name) throws DatabaseException
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{
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return imageTypeToIndex(new PropertyKey(m_ns_cache.namespaceNameToId(namespace),name));
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} // end imageTypeToIndex
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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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public void initialize(Element config_root, ServiceProvider services) throws ConfigException
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{
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String conn_name = null;
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String nscache_name = null;
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XMLLoader loader = XMLLoader.get();
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try
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{ // verify the right node name
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loader.verifyNodeName(config_root,"object");
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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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nscache_name = loader.getAttribute(elt,"namespaces");
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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 and namespace cache.
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DBConnectionPool pool = GetObjectUtils.getDatabaseConnection(services,conn_name);
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m_ns_cache =
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(NamespaceCache)(GetObjectUtils.getDynamoComponent(services,NamespaceCache.class,nscache_name));
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// Get the operations object.
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m_ops = ImageStoreOps.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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m_ns_cache = null;
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} // end shutdown
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/*--------------------------------------------------------------------------------
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* Implementations from interface ImageStore
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*--------------------------------------------------------------------------------
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*/
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public DataItem getImage(int id) throws DatabaseException
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{
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return m_ops.getImage(id);
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} // end getImage
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public int saveNewImage(String type_namespace, String type_name, Principal owner, DataItem image)
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throws DatabaseException
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{
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int image_type = imageTypeToIndex(type_namespace,type_name);
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int owner_id = 0, owner_flag = 0;
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if (owner instanceof DynamoUser)
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owner_id = ((DynamoUser)owner).getUID();
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else if (owner instanceof DynamoGroup)
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{ // get the GID
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owner_id = ((DynamoGroup)owner).getGID();
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owner_flag = 1;
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} // end else if
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else
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throw new DatabaseException(ImageStoreObject.class,"DatabaseMessages","img.badOwner");
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// call down to the database to save it all off
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return m_ops.saveNewImage(image_type,owner_id,owner_flag,image);
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} // end saveNewImage
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public void replaceImage(DynamoUser caller, int image_id, DataItem image)
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throws DatabaseException, DynamoSecurityException
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{
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if (m_ops.canReplaceImage(caller.getUID(),image_id))
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m_ops.replaceImage(image_id,image);
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else
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{ // throw a security exception here
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DynamoSecurityException dse = new DynamoSecurityException(ImageStoreObject.class,"DatabaseMessages",
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"img.notOwner");
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dse.setParameter(0,String.valueOf(image_id));
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throw dse;
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} // end else
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} // end replaceImage
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public int findImageID(String type_namespace, String type_name, Principal owner) throws DatabaseException
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{
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int image_type = imageTypeToIndex(type_namespace,type_name);
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int owner_id = 0, owner_flag = 0;
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if (owner instanceof DynamoUser)
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owner_id = ((DynamoUser)owner).getUID();
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else if (owner instanceof DynamoGroup)
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{ // get the GID
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owner_id = ((DynamoGroup)owner).getGID();
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owner_flag = 1;
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} // end else if
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else
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throw new DatabaseException(ImageStoreObject.class,"DatabaseMessages","img.badOwner");
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// call down to find it
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return m_ops.findImageID(image_type,owner_id,owner_flag);
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} // end findImageID
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public void deleteImage(DynamoUser caller, int image_id) throws DatabaseException, DynamoSecurityException
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{
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if (m_ops.canReplaceImage(caller.getUID(),image_id))
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m_ops.deleteImage(image_id);
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else
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{ // throw a security exception here
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DynamoSecurityException dse = new DynamoSecurityException(ImageStoreObject.class,"DatabaseMessages",
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"img.notOwner");
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dse.setParameter(0,String.valueOf(image_id));
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throw dse;
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} // end else
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} // end deleteImage
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public DataItem normalizeImage(DataItem source, int width, int height, String new_type) throws Exception
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{
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try
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{ // normalize the image and encapsulate it in a StaticDataItem
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byte[] data = ImageNormalizer.normalizeImage(source.getDataStream(),width,height,new_type);
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return new StaticDataItem(source.getName() + "-converted",new_type,data.length,data);
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} // end try
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catch (ImageNormalizerException e)
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{ // morph the exception
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ExternalException ee = new ExternalException(ImageStoreObject.class,"DatabaseMessages",
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"img.normalize",e);
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ee.setParameter(0,source.getName());
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ee.setParameter(1,e.getMessage());
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throw ee;
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} // end catch
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} // end normalizeImage
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} // end class ImageStoreObject
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