/*
* Carrot2 project.
*
* Copyright (C) 2002-2014, Dawid Weiss, Stanisław Osiński.
* All rights reserved.
*
* Refer to the full license file "carrot2.LICENSE"
* in the root folder of the repository checkout or at:
* http://www.carrot2.org/carrot2.LICENSE
*/
package org.carrot2.workbench.core.ui;
import java.io.*;
import java.util.Map;
import org.apache.commons.lang.StringUtils;
import org.carrot2.core.attribute.Processing;
import org.carrot2.util.attribute.*;
import org.carrot2.workbench.core.WorkbenchCorePlugin;
import org.carrot2.workbench.core.helpers.Utils;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.ui.IElementFactory;
import org.eclipse.ui.IMemento;
/**
* Factory storing and restoring {@link SearchInput} instances from {@link IMemento}.
*/
public final class SearchInputFactory implements IElementFactory
{
private static final String ID_ATTRIBUTE = "id";
private static final String ALGORITHM_ELEMENT = "algorithm";
private static final String SOURCE_ELEMENT = "source";
private static final String ATTRIBUTES_ELEMENT = "attributes";
/**
* Public identifier of this {@link IElementFactory}.
*/
public static final String ID = "org.carrot2.workbench.core.searchParametersFactory";
/*
*
*/
public IAdaptable createElement(IMemento memento)
{
String source = tryGetStringFrom(memento, SOURCE_ELEMENT, ID_ATTRIBUTE);
String algorithm = tryGetStringFrom(memento, ALGORITHM_ELEMENT, ID_ATTRIBUTE);
if (StringUtils.isBlank(source) || StringUtils.isBlank(algorithm))
{
return null;
}
final SearchInput search;
AttributeValueSet attributes = null;
try
{
IMemento attMemento = memento.getChild(ATTRIBUTES_ELEMENT);
if (attMemento != null)
{
String data = attMemento.getTextData();
if (data != null)
{
final AttributeValueSets sets = AttributeValueSets
.deserialize(new ByteArrayInputStream(data.getBytes("UTF-8")));
attributes = sets.getDefaultAttributeValueSet();
}
}
}
catch (Exception e)
{
Utils.logError(e, false);
}
if (attributes == null)
{
attributes = new AttributeValueSet("defaults");
}
search = new SearchInput(source, algorithm, attributes);
return search;
}
private String tryGetStringFrom(IMemento memento, String elementName,
String attributeName)
{
IMemento child = memento.getChild(elementName);
if (child != null)
{
return child.getString(attributeName);
}
return null;
}
@SuppressWarnings("unchecked")
static void saveState(SearchInput search, IMemento memento)
{
memento.createChild(SOURCE_ELEMENT).putString(ID_ATTRIBUTE, search.getSourceId());
memento.createChild(ALGORITHM_ELEMENT).putString(ID_ATTRIBUTE,
search.getAlgorithmId());
try
{
final WorkbenchCorePlugin core = WorkbenchCorePlugin.getDefault();
/*
* Limit saved attributes to @Input and @Processing ones.
*/
final Map<String, Object> actual = search.getAttributeValueSet()
.getAttributeValues();
final AttributeValueSet filtered = new AttributeValueSet("memento-saved");
final BindableDescriptor input = core.getComponentDescriptor(
search.getSourceId()).flatten().only(Input.class, Processing.class);
for (String key : input.attributeDescriptors.keySet())
{
if (actual.containsKey(key))
{
filtered.setAttributeValue(key, actual.get(key));
}
}
final BindableDescriptor algorithm = core.getComponentDescriptor(
search.getAlgorithmId()).flatten().only(Input.class, Processing.class);
for (String key : algorithm.attributeDescriptors.keySet())
{
if (actual.containsKey(key))
{
filtered.setAttributeValue(key, actual.get(key));
}
}
final ByteArrayOutputStream os = new ByteArrayOutputStream();
AttributeValueSets sets = new AttributeValueSets();
sets.addAttributeValueSet("default", filtered);
sets.serialize(os);
os.close();
memento.createChild(ATTRIBUTES_ELEMENT).putTextData(
new String(os.toByteArray(), "UTF-8"));
}
catch (Exception e)
{
Utils.logError(e, false);
}
}
}