/*
* Copyright (c) 2010 Lockheed Martin Corporation
*
* 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.eurekastreams.server.persistence.mappers;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import org.eurekastreams.server.domain.stream.HashTag;
/**
* Mapper that builds a new HashTag from its content.
*/
public class HashTagBuilderMapper implements DomainMapper<List<String>, List<HashTag>>
{
/**
* Return a new HashTag from the input content.
*
* @param inHashTags
* the hash tags contents
* @return a new HashTag from the input content
*/
@Override
public List<HashTag> execute(final List<String> inHashTags)
{
// weed out dupes with hashset
Set<String> hashTagContents = new HashSet<String>();
for (String htContent : inHashTags)
{
if (!htContent.startsWith("#"))
{
hashTagContents.add("#" + htContent.toLowerCase());
}
else
{
hashTagContents.add(htContent.toLowerCase());
}
}
List<HashTag> results = new ArrayList<HashTag>();
for (String htContent : hashTagContents)
{
results.add(new HashTag(htContent));
}
return results;
}
}