nz.co.gregs.dbvolution.operators.DBNonOperator Maven / Gradle / Ivy

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/*
 * Copyright 2013 Gregory Graham.
 *
 * 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 nz.co.gregs.dbvolution.operators;

import nz.co.gregs.dbvolution.databases.definitions.DBDefinition;
import nz.co.gregs.dbvolution.datatypes.QueryableDatatypeSyncer.DBSafeInternalQDTAdaptor;
import nz.co.gregs.dbvolution.expressions.BooleanExpression;
import nz.co.gregs.dbvolution.expressions.DBExpression;

/**
 * Creates an operation that does nothing.
 *
 * Support DBvolution at
 * Patreon
 *
 * @author gregorygraham
 */
public class DBNonOperator extends DBOperator {

	private static final long serialVersionUID = 1L;

	@Override
	public DBNonOperator copyAndAdapt(DBSafeInternalQDTAdaptor typeAdaptor) {
		return this;
	}

	@Override
	public BooleanExpression generateWhereExpression(DBDefinition db, DBExpression column) {
		return BooleanExpression.trueExpression();
	}
}