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Neo4j Server Plugin Examples
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/*
 * Licensed to Neo Technology under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Neo Technology licenses this file to you 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.examples.server;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class TraversalDefinition
{
    public static final String DEPTH_FIRST = "depth first";
    public static final String NODE = "node";
    public static final String ALL = "all";

    private String uniqueness = NODE;
    private int maxDepth = 1;
    private String returnFilter = ALL;
    private String order = DEPTH_FIRST;
    private List relationships = new ArrayList();

    public void setOrder( String order )
    {
        this.order = order;
    }

    public void setUniqueness( String uniqueness )
    {
        this.uniqueness = uniqueness;
    }

    public void setMaxDepth( int maxDepth )
    {
        this.maxDepth = maxDepth;
    }

    public void setReturnFilter( String returnFilter )
    {
        this.returnFilter = returnFilter;
    }

    public void setRelationships( Relation... relationships )
    {
        this.relationships = Arrays.asList( relationships );
    }

    public String toJson()
    {
        StringBuilder sb = new StringBuilder();
        sb.append( "{ " );
        sb.append( " \"order\" : \"" + order + "\"" );
        sb.append( ", " );
        sb.append( " \"uniqueness\" : \"" + uniqueness + "\"" );
        sb.append( ", " );
        if ( relationships.size() > 0 )
        {
            sb.append( "\"relationships\" : [" );
            for ( int i = 0; i < relationships.size(); i++ )
            {
                sb.append( relationships.get( i )
                        .toJsonCollection() );
                if ( i < relationships.size() - 1 )
                { // Miss off the final comma
                    sb.append( ", " );
                }
            }
            sb.append( "], " );
        }
        sb.append( "\"return filter\" : { " );
        sb.append( "\"language\" : \"builtin\", " );
        sb.append( "\"name\" : \"" );
        sb.append( returnFilter );
        sb.append( "\" }, " );
        sb.append( "\"max depth\" : " );
        sb.append( maxDepth );
        sb.append( " }" );
        return sb.toString();
    }
}