SiteManagerBackend.java

/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements.  See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.stanbol.entityhub.ldpath.backend;

import org.apache.stanbol.entityhub.core.mapping.ValueConverterFactory;
import org.apache.stanbol.entityhub.core.model.InMemoryValueFactory;
import org.apache.stanbol.entityhub.core.query.DefaultQueryFactory;
import org.apache.stanbol.entityhub.servicesapi.EntityhubException;
import org.apache.stanbol.entityhub.servicesapi.model.Entity;
import org.apache.stanbol.entityhub.servicesapi.model.Representation;
import org.apache.stanbol.entityhub.servicesapi.model.ValueFactory;
import org.apache.stanbol.entityhub.servicesapi.query.FieldQuery;
import org.apache.stanbol.entityhub.servicesapi.query.FieldQueryFactory;
import org.apache.stanbol.entityhub.servicesapi.query.QueryResultList;
import org.apache.stanbol.entityhub.servicesapi.site.SiteManager;

public class SiteManagerBackend extends AbstractBackend {

    protected final SiteManager siteManager;
    private ValueFactory vf = InMemoryValueFactory.getInstance();
    private FieldQueryFactory qf = DefaultQueryFactory.getInstance();
    
    public SiteManagerBackend(SiteManager siteManager) {
        this(siteManager,null);
    }
    public SiteManagerBackend(SiteManager siteManager,ValueConverterFactory valueConverter) {
        super(valueConverter);
        if(siteManager == null){
            throw new IllegalArgumentException("The parsed ReferencedSiteManager MUST NOT be NULL");
        }
        this.siteManager = siteManager;
    }
    @Override
    protected FieldQuery createQuery() {
        return qf.createFieldQuery();
    }
    @Override
    protected Representation getRepresentation(String id) throws EntityhubException {
        Entity entity = siteManager.getEntity(id);
        return entity != null ? entity.getRepresentation() : null;
    }
    @Override
    protected ValueFactory getValueFactory() {
        return vf;
    }
    @Override
    protected QueryResultList<String> query(FieldQuery query) throws EntityhubException {
        return siteManager.findIds(query);
    }
    
}