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Provides seamlessly integrated Java access to graph databases (Neo4J) at different levels of abstraction.

There is a newer version: 4.2.0

/************************************************************************
 * Copyright (c) 2014-2015 IoT-Solutions e.U.
 * 
 * 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 iot.jcypher.query.api.pattern;

import java.util.List;

import iot.jcypher.domain.internal.CurrentDomain;
import iot.jcypher.query.ast.pattern.PatternExpression;
import iot.jcypher.query.ast.pattern.PatternNode;
import iot.jcypher.query.ast.pattern.PatternRelation;
import iot.jcypher.query.values.JcRelation;

public class Node extends Element {

	Node(PatternExpression expression) {
		super(expression);
	}
	
	/**
	 * JCYPHER
	 * match or create (depends on the clause) relations connected to the node
	 * e.g. MATCH.node(n).relation()
	 * 

	 */
	public Relation relation() {
		return relation(null);
	}
	
	/**
	 * JCYPHER
	 * match or create (depends on the clause) relations connected to the node, 
	 * 
make them accessible by a JcRelation element later on in the query
	 * e.g. MATCH.node(n).relation(r)
	 * 

	 */
	public Relation relation(JcRelation relation) {
		PatternExpression px = (PatternExpression)this.astNode;
		PatternRelation pr = new PatternRelation(relation);
		px.addElement(pr);
		Relation ret = new Relation(px);
		return ret;
	}
	
	/**
	 * JCYPHER
	 * set a label to match or create nodes with that label
	 * e.g. MATCH.node(n).label("Movie")
	 * 

	 */
	public Node label(String label) {
		PatternExpression px = (PatternExpression)this.astNode;
		List labels = ((PatternNode)px.getLastElement()).getLabels();
		labels.add(label);
		String dLab = CurrentDomain.label.get();
		if (dLab != null && !labels.contains(dLab))
			labels.add(dLab);
		return this;
	}
	
	/**
	 * JCYPHER
	 * set a label to match or create nodes with that label
	 * using enum label
	 * e.g. MATCH.node(n).label(MyLabels.Movie)
	 * 

	 */
	public Node label(Enum label) {
		return label(label.name());
	}

}