com.frank.search.solr.core.convert.SolrJConverter.java Source code

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Here is the source code for com.frank.search.solr.core.convert.SolrJConverter.java

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/*
 * Copyright 2012 - 2013 the original author or authors.
 *
 * 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 com.frank.search.solr.core.convert;

import com.frank.search.solr.core.mapping.SimpleSolrMappingContext;
import com.frank.search.solr.core.mapping.SolrPersistentEntity;
import com.frank.search.solr.core.mapping.SolrPersistentProperty;
import com.frank.search.solr.core.query.Update;
import org.apache.solr.client.solrj.beans.DocumentObjectBinder;
import org.apache.solr.common.SolrDocument;
import org.apache.solr.common.SolrDocumentList;
import org.apache.solr.common.SolrInputDocument;
import org.springframework.data.mapping.context.MappingContext;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;

/**
 * Trivial implementation of {@link SolrConverter} delegating conversion to {@link org.apache.solr.client.solrj.beans.DocumentObjectBinder}
 * 
 * @author Christoph Strobl
 */
public class SolrJConverter extends SolrConverterBase implements SolrConverter {

    private final MappingContext<? extends SolrPersistentEntity<?>, SolrPersistentProperty> mappingContext;

    public SolrJConverter() {
        this.mappingContext = new SimpleSolrMappingContext();
        initializeConverters();
    }

    @Override
    public MappingContext<? extends SolrPersistentEntity<?>, SolrPersistentProperty> getMappingContext() {
        return mappingContext;
    }

    @Override
    public <S, R> List<R> read(SolrDocumentList source, Class<R> type) {
        if (source == null) {
            return Collections.emptyList();
        }

        List<R> resultList = new ArrayList<R>(source.size());
        for (Map<String, ?> item : source) {
            resultList.add(read(type, item));
        }

        return resultList;
    }

    @Override
    public <R> R read(Class<R> type, Map<String, ?> source) {
        if (!canConvert(SolrDocument.class, type)) {
            initializeTypedConverter(source, type);
        }
        return convert(source, type);
    }

    @SuppressWarnings({ "unchecked", "rawtypes" })
    @Override
    public void write(Object source, Map sink) {
        if (source == null) {
            return;
        }

        SolrInputDocument convertedDocument = convert(source, SolrInputDocument.class);
        sink.putAll(convertedDocument);
    }

    private void initializeConverters() {
        if (!canConvert(Update.class, SolrInputDocument.class)) {
            getConversionService().addConverter(new SolrjConverters.UpdateToSolrInputDocumentConverter());
        }
        if (!canConvert(Object.class, SolrInputDocument.class)) {
            getConversionService().addConverter(
                    new SolrjConverters.ObjectToSolrInputDocumentConverter(new DocumentObjectBinder()));
        }
    }

    @SuppressWarnings("unchecked")
    private <S> void initializeTypedConverter(Map<String, ?> source, Class<? extends S> rawType) {
        getConversionService().addConverter(source.getClass(), rawType,
                new SolrjConverters.SolrInputDocumentToObjectConverter<S>((Class<S>) rawType));
    }

}