/*
* 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;
/**
* An abstract implementation that throws UnsupportedOperationException on
* every method.
*
* @author Pinaki Poddar
*
*/
abstract class AbstractVisitable implements Visitable {
public static final String SPACE = " ";
public static final String OPEN_BRACE = "(";
public static final String CLOSE_BRACE = ")";
public static final String COMMA = ",";
public static final String EMPTY = "";
public String asExpression(AliasContext ctx) {
throw new UnsupportedOperationException(this.getClass().getName());
}
public String asProjection(AliasContext ctx) {
throw new UnsupportedOperationException(this.getClass().getName());
}
public String getAliasHint(AliasContext ctx) {
throw new UnsupportedOperationException(this.getClass().getName());
}
public String asJoinable(AliasContext ctx) {
throw new UnsupportedOperationException(this.getClass().getName());
}
}