com.attribyte.essem.StoredGraphParser.java Source code

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Here is the source code for com.attribyte.essem.StoredGraphParser.java

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/*
 * Copyright 2015 Attribyte, LLC
 *
 * 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.attribyte.essem;

import com.attribyte.essem.model.StoredGraph;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.node.ObjectNode;
import com.google.common.collect.Lists;
import java.io.IOException;
import java.util.List;

/**
 * Parse keys from ES response that results from <code>StoredGraphQuery</code> methods.
 */
public class StoredGraphParser {

    /**
     * Parses a stored graph response.
     * @param esObject The ES response object.
     * @return The list of graphs.
     */
    public static List<StoredGraph> parseGraphs(ObjectNode esObject) throws IOException {
        List<StoredGraph> graphList = Lists.newArrayListWithExpectedSize(16);
        JsonNode hitsObj = esObject.get("hits");
        if (hitsObj != null) {
            JsonNode hitsArr = hitsObj.get("hits");
            if (hitsArr != null) {
                for (JsonNode hitObj : hitsArr) {
                    JsonNode fieldsObj = hitObj.get("fields");
                    if (fieldsObj != null) {
                        graphList.add(StoredGraph.fromJSON(fieldsObj));
                    }
                }
            }
        }
        return graphList;
    }
}