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Access to the Neo4j graph database through Java

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/*
 * Copyright (c) "Neo4j"
 * Neo4j Sweden AB [http://neo4j.com]
 *
 * This file is part of Neo4j.
 *
 * 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 org.neo4j.driver.internal;

import java.util.Collections;
import java.util.Map;
import org.neo4j.driver.Value;
import org.neo4j.driver.internal.value.RelationshipValue;
import org.neo4j.driver.types.Relationship;

/**
 * {@link Relationship} implementation that directly contains type and properties.
 */
public class InternalRelationship extends InternalEntity implements Relationship {
    private long start;
    private long end;
    private final String type;

    public InternalRelationship(long id, long start, long end, String type) {
        this(id, start, end, type, Collections.emptyMap());
    }

    public InternalRelationship(long id, long start, long end, String type, Map properties) {
        super(id, properties);
        this.start = start;
        this.end = end;
        this.type = type;
    }

    @Override
    public boolean hasType(String relationshipType) {
        return type().equals(relationshipType);
    }

    /** Modify the start/end identities of this relationship */
    public void setStartAndEnd(long start, long end) {
        this.start = start;
        this.end = end;
    }

    @Override
    public long startNodeId() {
        return start;
    }

    @Override
    public long endNodeId() {
        return end;
    }

    @Override
    public String type() {
        return type;
    }

    @Override
    public Value asValue() {
        return new RelationshipValue(this);
    }

    @Override
    public String toString() {
        return String.format("relationship<%s>", id());
    }
}