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/**
 * ============LICENSE_START=======================================================
 * org.onap.aai
 * ================================================================================
 * Copyright © 2017-2018 AT&T Intellectual Property. All rights reserved.
 * ================================================================================
 * 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.
 * ============LICENSE_END=========================================================
 */

package org.onap.aai.serialization.queryformats;

import static org.mockito.Matchers.isA;
import static org.mockito.Mockito.when;

import java.io.IOException;
import java.lang.reflect.Field;
import java.lang.reflect.Modifier;

import org.apache.tinkerpop.gremlin.structure.Graph;
import org.apache.tinkerpop.gremlin.structure.Vertex;
import org.apache.tinkerpop.gremlin.structure.io.IoCore;
import org.apache.tinkerpop.gremlin.tinkergraph.structure.TinkerGraph;
import org.mockito.invocation.InvocationOnMock;
import org.mockito.stubbing.Answer;
import org.onap.aai.db.props.AAIProperties;
import org.onap.aai.serialization.queryformats.exceptions.AAIFormatVertexException;
import org.onap.aai.serialization.queryformats.utils.UrlBuilder;

public class QueryFormatTestHelper {

    public static final String testResources = "src/test/resources/org.onap.aai/serialization/queryformats/";
    public static final String graphsonResources =
            "src/test/resources/org.onap.aai/serialization/queryformats/graphson/";

    public static void mockPathed(UrlBuilder mock) throws AAIFormatVertexException {
        Answer<String> answer = new Answer<String>() {
            public String answer(InvocationOnMock invocation) throws Throwable {
                Vertex v = invocation.getArgumentAt(0, Vertex.class);

                return v.<String>property(AAIProperties.AAI_URI).orElse("urimissing");
            }
        };
        when(mock.pathed(isA(Vertex.class))).thenAnswer(answer);

    }

    public static Graph loadGraphson(String fileName) throws IOException {
        final Graph graph = TinkerGraph.open();
        graph.io(IoCore.graphson()).readGraph(QueryFormatTestHelper.graphsonResources + fileName);

        return graph;
    }

    public static void setFinalStatic(Field field, Object newValue) throws Exception {
        field.setAccessible(true);
        // remove final modifier from field
        Field modifiersField = Field.class.getDeclaredField("modifiers");
        modifiersField.setAccessible(true);
        modifiersField.setInt(field, field.getModifiers() & ~Modifier.FINAL);
        field.set(null, newValue);
    }

}