/*******************************************************************************
* Copyright 2012 University of Southern California
*
* Licensed 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.
*
* This code was developed by the Information Integration Group as part
* of the Karma project at the Information Sciences Institute of the
* University of Southern California. For more information, publications,
* and related projects, please see: http://www.isi.edu/integration
******************************************************************************/
/**
*
*/
package edu.isi.karma.controller.update;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Set;
import edu.isi.karma.util.JSONUtil;
import edu.isi.karma.view.VWorkspace;
/**
* Container class to carry multiple update objects.
*
* @author szekely
*
*/
public class UpdateContainer {
private final List<AbstractUpdate> updates = new LinkedList<>();
public enum JsonKeys {
elements, workspaceId
}
public UpdateContainer() {
}
public UpdateContainer(AbstractUpdate update) {
updates.add(update);
}
public void add(AbstractUpdate update) {
append(new UpdateContainer(update));
}
public void append(UpdateContainer updateContainer) {
Set<AbstractUpdate> needToDeleted = new HashSet<>();
for (AbstractUpdate update : updateContainer.updates) {
for (AbstractUpdate update2 : updates) {
if (update2.equals(update)) {
needToDeleted.add(update2);
break;
}
}
}
updates.removeAll(needToDeleted);
updates.addAll(updateContainer.updates);
}
public void generateJson(String prefix, PrintWriter pw,
VWorkspace vWorkspace) {
pw.println(prefix + "{");
String newPref = prefix + " ";
pw.println(newPref
+ JSONUtil.json(JsonKeys.workspaceId, vWorkspace.getWorkspace()
.getId()));
pw.println(newPref + JSONUtil.jsonStartList(JsonKeys.elements));
Iterator<AbstractUpdate> it = updates.iterator();
while (it.hasNext()) {
AbstractUpdate update = it.next();
update.generateJson(newPref + " ", pw, vWorkspace);
if (it.hasNext()) {
pw.println(newPref + " ,");
}
}
pw.println(newPref + "]");
pw.println(prefix + "}");
}
public void applyUpdates(VWorkspace vWorkspace)
{
Iterator<AbstractUpdate> it = updates.iterator();
while (it.hasNext()) {
it.next().applyUpdate(vWorkspace);
}
}
public void removeUpdateByClass(Class<? extends AbstractUpdate> clazz) {
Iterator<AbstractUpdate> it = updates.iterator();
while (it.hasNext()) {
AbstractUpdate t = it.next();
if (t.getClass().equals(clazz))
it.remove();
}
}
/**
* @param vWorkspace
* @return the JSON as a String.
*/
public String generateJson(VWorkspace vWorkspace) {
StringWriter sw = new StringWriter();
PrintWriter pw = new PrintWriter(sw);
generateJson("", pw, vWorkspace);
return sw.toString();
}
}