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/*
* ====================================================================
* Project: openMDX/Core, http://www.openmdx.org/
* Description: Standard Preferences
* Owner: OMEX AG, Switzerland, http://www.omex.ch
* ====================================================================
*
* This software is published under the BSD license as listed below.
*
* Copyright (c) 2012, OMEX AG, Switzerland
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* * Neither the name of the openMDX team nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* ------------------
*
* This product includes software developed by other organizations as
* listed in the NOTICE file.
*/
package org.openmdx.preferences2.prefs;
import java.util.ArrayList;
import java.util.List;
import java.util.prefs.AbstractPreferences;
import java.util.prefs.BackingStoreException;
import javax.jdo.PersistenceManager;
import org.openmdx.base.persistence.cci.PersistenceHelper;
import org.openmdx.base.persistence.cci.UnitOfWork;
import org.openmdx.kernel.jdo.ReducedJDOHelper;
import org.openmdx.preferences2.cci2.NodeQuery;
import org.openmdx.preferences2.jmi1.Entry;
import org.openmdx.preferences2.jmi1.Node;
/**
* Standard Preferences
*/
class ManagedPreferences extends AbstractPreferences implements Retrievable {
/**
* Constructor
*
* @param node
*/
ManagedPreferences(
Node node
) {
super(null, "");
this.node = node;
}
/**
* Constructor
*
* @param parent
* @param node
*/
protected ManagedPreferences(
ManagedPreferences parent,
Node node
) {
super(parent, node.getName());
this.node = node;
}
/**
* The JMI node corresponding to this preferences node
*/
private final Node node;
/**
* Retrieve the persistence manager associated with the root node
*
* @return the persistence manager associated with the root node
*/
protected PersistenceManager jmiEntityManager(){
return ReducedJDOHelper.getPersistenceManager(this.node);
}
/**
* Retrieve the unit of work associated with the root node
*
* @return the unit of work associated with the root node
*/
protected UnitOfWork currentUnitOfWork(){
return PersistenceHelper.currentUnitOfWork(jmiEntityManager());
}
/* (non-Javadoc)
* @see java.util.prefs.AbstractPreferences#putSpi(java.lang.String, java.lang.String)
*/
@Override
protected void putSpi(String key, String value) {
Entry entry = this.node.getEntry(key);
if(entry == null) {
entry = jmiEntityManager().newInstance(Entry.class);
this.node.addEntry(key, entry);
}
entry.setValue(value);
}
/* (non-Javadoc)
* @see java.util.prefs.AbstractPreferences#getSpi(java.lang.String)
*/
@Override
protected String getSpi(String key) {
Entry entry = this.node.getEntry(key);
return entry == null ? null : entry.getValue();
}
/* (non-Javadoc)
* @see java.util.prefs.AbstractPreferences#removeSpi(java.lang.String)
*/
@Override
protected void removeSpi(String key) {
Entry entry = this.node.getEntry(key);
if(entry != null) {
entry.setValue(null);
}
}
/* (non-Javadoc)
* @see java.util.prefs.AbstractPreferences#removeNodeSpi()
*/
@Override
protected void removeNodeSpi(
) throws BackingStoreException {
try {
this.node.refDelete();
} catch (RuntimeException exception) {
throw new BackingStoreException(exception);
}
}
/* (non-Javadoc)
* @see java.util.prefs.AbstractPreferences#keysSpi()
*/
@Override
protected String[] keysSpi(
) throws BackingStoreException {
try {
List keys = new ArrayList();
for(Entry entry : this.node.getEntry()) {
if(entry.getValue() != null) {
keys.add(entry.getName());
}
}
return keys.toArray(new String[keys.size()]);
} catch (RuntimeException exception) {
throw new BackingStoreException(exception);
}
}
/* (non-Javadoc)
* @see java.util.prefs.AbstractPreferences#childrenNamesSpi()
*/
@Override
protected String[] childrenNamesSpi(
) throws BackingStoreException {
try {
List childrenNames = new ArrayList();
for(Node child : this.node.getChild(this.node.getRoot())) {
childrenNames.add(child.getName());
}
return childrenNames.toArray(new String[childrenNames.size()]);
} catch (RuntimeException exception) {
throw new BackingStoreException(exception);
}
}
/* (non-Javadoc)
* @see java.util.prefs.AbstractPreferences#childSpi(java.lang.String)
*/
@Override
protected AbstractPreferences childSpi(
String name
) {
return new ManagedPreferences(this, getChildNode(name));
}
/**
* Create a new child node
*
* @param name
*
* @param entityManager
*
* @return a new Node
*/
protected Node getChildNode(
String name
) {
PersistenceManager entityManager = jmiEntityManager();
NodeQuery query = (NodeQuery) entityManager.newQuery(Node.class);
query.name().equalTo(name);
query.thereExistsParent().equalTo(this.node);
List nodes = this.node.getRoot().getNode(query);
return nodes.isEmpty() ? newChildNode(name) : nodes.get(0);
}
/**
* Create a new child node
*
* @param name
*
* @param entityManager
*
* @return a new Node
*/
protected Node newChildNode(
String name
) {
Node child = jmiEntityManager().newInstance(Node.class);
child.setParent(this.node);
child.setName(name);
this.node.getRoot().addNode(child);
return child;
}
/* (non-Javadoc)
* @see java.util.prefs.AbstractPreferences#sync()
*/
@Override
public void sync(
) throws BackingStoreException {
flush();
PersistenceHelper.retrieveAllDescendants(this.node);
}
/* (non-Javadoc)
* @see java.util.prefs.AbstractPreferences#syncSpi()
*/
@Override
protected void syncSpi(
) throws BackingStoreException {
// We did override sync() instead
}
/* (non-Javadoc)
* @see java.util.prefs.AbstractPreferences#flush()
*/
@Override
public void flush(
) throws BackingStoreException {
try {
jmiEntityManager().flush();
} catch (RuntimeException exception) {
throw new BackingStoreException(exception);
}
}
/* (non-Javadoc)
* @see java.util.prefs.AbstractPreferences#flushSpi()
*/
@Override
protected void flushSpi(
) throws BackingStoreException {
// We did override flush() instead
}
/* (non-Javadoc)
* @see org.openmdx.preferences2.prefs.Retrievable#retrieve()
*/
// @Override
public void retrieveAll() {
PersistenceHelper.retrieveAllDescendants(
ReducedJDOHelper.getPersistenceManager(
this.node
).getObjectById(
this.node.refGetPath().getPrefix(7)
)
);
}
}
