/*******************************************************************************
* Copyright 2009, 2010 Lars Grammel
*
* 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.
*******************************************************************************/
package org.thechiselgroup.choosel.core.client.views.resolvers;
import java.util.Map;
import org.thechiselgroup.choosel.core.client.resources.DataType;
import org.thechiselgroup.choosel.core.client.resources.Resource;
import org.thechiselgroup.choosel.core.client.resources.ResourceCategorizer;
import org.thechiselgroup.choosel.core.client.resources.ResourceSetUtils;
import org.thechiselgroup.choosel.core.client.util.collections.CollectionFactory;
import org.thechiselgroup.choosel.core.client.views.model.ViewItem;
import org.thechiselgroup.choosel.core.client.views.model.ViewItemValueResolverContext;
public class ViewItemColorResolver implements ViewItemValueResolver {
private static final String[] COLORS = new String[] { "#6495ed", "#b22222",
"#A9C0B1" };
private ResourceCategorizer categorizer;
private Map<String, String> resourceTypeToColor = CollectionFactory
.createStringMap();
public ViewItemColorResolver(ResourceCategorizer categorizer) {
this.categorizer = categorizer;
}
@Override
public DataType getVisualDimensionDataType() {
return DataType.COLOR;
}
@Override
public Object resolve(ViewItem viewItem,
ViewItemValueResolverContext context) {
// TODO what if resource.isEmpty?
if (viewItem.getResources().isEmpty()) {
return COLORS[0]; // XXX we need something better
}
Resource resource = ResourceSetUtils.firstResource(viewItem
.getResources());
String resourceType = categorizer.getCategory(resource);
if (!resourceTypeToColor.containsKey(resourceType)) {
resourceTypeToColor.put(resourceType,
COLORS[resourceTypeToColor.size()]);
}
return resourceTypeToColor.get(resourceType);
}
}