at.molindo.esi4j.action.impl.DefaultMultiGetResponseWrapper.java Source code

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Here is the source code for at.molindo.esi4j.action.impl.DefaultMultiGetResponseWrapper.java

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/**
 * Copyright 2010 Molindo GmbH
 *
 * 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 at.molindo.esi4j.action.impl;

import java.util.List;

import org.elasticsearch.action.get.MultiGetItemResponse;
import org.elasticsearch.action.get.MultiGetResponse;

import at.molindo.esi4j.action.MultiGetItemResponseWrapper;
import at.molindo.esi4j.action.MultiGetItemResponseWrapper.MultiGetItemReader;
import at.molindo.esi4j.action.MultiGetResponseWrapper;

import com.google.common.collect.Lists;

public class DefaultMultiGetResponseWrapper implements MultiGetResponseWrapper {

    private final MultiGetResponse _response;
    private final MultiGetItemReader _reader;

    private List<MultiGetItemResponseWrapper> _objects;

    public DefaultMultiGetResponseWrapper(MultiGetResponse response, MultiGetItemReader reader) {
        if (response == null) {
            throw new NullPointerException("response");
        }
        if (reader == null) {
            throw new NullPointerException("reader");
        }
        _response = response;
        _reader = reader;
    }

    @Override
    public synchronized List<MultiGetItemResponseWrapper> getMultiGetItemResponses() {
        if (_objects == null) {
            MultiGetItemResponse[] reps = _response.getResponses();
            _objects = Lists.newArrayListWithCapacity(reps.length);
            for (int i = 0; i < reps.length; i++) {
                _objects.add(new DefaultMultiGetItemResponseWrapper(reps[i], _reader));
            }
        }
        return _objects;
    }

    @Override
    public MultiGetResponse getMultiGetResponse() {
        return _response;
    }

    @Override
    public List<?> getObjects() {
        return getObjects(Object.class);
    }

    @Override
    public <T> List<T> getObjects(Class<T> type) {
        List<MultiGetItemResponseWrapper> resps = getMultiGetItemResponses();
        List<T> objects = Lists.newArrayListWithCapacity(resps.size());

        for (MultiGetItemResponseWrapper hit : resps) {
            objects.add(hit.getObject(type));
        }

        return objects;
    }

}