openjpa-persistence/src/main/java/org/apache/openjpa/persistence/query/PathOperator.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF 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.apache.openjpa.persistence.query;

/**
 * Operator that combines two components to form a path.
 *
 * @author Pinaki Poddar
 *
 */
public enum PathOperator {
	NONE(" "),
	INNER(" JOIN "),
	OUTER(" LEFT JOIN "),
	FETCH_INNER(" JOIN FETCH "),
	FETCH_OUTER(" LEFT JOIN FETCH "),
	NAVIGATION("."),
	KEY("KEY"),
	ROOT(""),
	VALUE("VALUE"),
	ENTRY("ENTRY");

	private final String _symbol;

	PathOperator(String symbol) {
		_symbol = symbol;
	}

	@Override
    public String toString() {
		return _symbol;
	}
}