org.jooq.impl.Contains Maven / Gradle / Ivy
/**
* Copyright (c) 2009-2014, Data Geekery GmbH (http://www.datageekery.com)
* All rights reserved.
*
* This work is dual-licensed
* - under the Apache Software License 2.0 (the "ASL")
* - under the jOOQ License and Maintenance Agreement (the "jOOQ License")
* =============================================================================
* You may choose which license applies to you:
*
* - If you're using this work with Open Source databases, you may choose
* either ASL or jOOQ License.
* - If you're using this work with at least one commercial database, you must
* choose jOOQ License
*
* For more information, please visit http://www.jooq.org/licenses
*
* Apache Software License 2.0:
* -----------------------------------------------------------------------------
* 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.
*
* jOOQ License and Maintenance Agreement:
* -----------------------------------------------------------------------------
* Data Geekery grants the Customer the non-exclusive, timely limited and
* non-transferable license to install and use the Software under the terms of
* the jOOQ License and Maintenance Agreement.
*
* This library is distributed with a LIMITED WARRANTY. See the jOOQ License
* and Maintenance Agreement for more details: http://www.jooq.org/licensing
*/
package org.jooq.impl;
import static org.jooq.Clause.CONDITION;
import static org.jooq.Clause.CONDITION_COMPARISON;
import static org.jooq.impl.DSL.inline;
import static org.jooq.impl.DSL.val;
import org.jooq.Clause;
import org.jooq.Condition;
import org.jooq.Configuration;
import org.jooq.Context;
import org.jooq.Field;
/**
* Abstraction for various "contains" operations
*
* @author Lukas Eder
*/
class Contains extends AbstractCondition {
/**
* Generated UID
*/
private static final long serialVersionUID = 6146303086487338550L;
private static final Clause[] CLAUSES = { CONDITION, CONDITION_COMPARISON };
private final Field lhs;
private final Field rhs;
private final T value;
Contains(Field field, T value) {
this.lhs = field;
this.rhs = null;
this.value = value;
}
Contains(Field field, Field rhs) {
this.lhs = field;
this.rhs = rhs;
this.value = null;
}
@Override
public final void accept(Context ctx) {
ctx.visit(condition(ctx.configuration()));
}
@Override
public final Clause[] clauses(Context ctx) {
return CLAUSES;
}
private final Condition condition(Configuration configuration) {
// [#1107] Some dialects support "contains" operations for ARRAYs
if (lhs.getDataType().isArray()) {
return new PostgresArrayContains();
}
// "contains" operations on Strings
else {
Field concat;
if (rhs == null) {
concat = DSL.concat(inline("%"), Utils.escapeForLike(value, configuration), inline("%"));
}
else {
concat = DSL.concat(inline("%"), Utils.escapeForLike(rhs, configuration), inline("%"));
}
return lhs.like(concat, Utils.ESCAPE);
}
}
/**
* The Postgres array contains operator
*/
private class PostgresArrayContains extends AbstractCondition {
/**
* Generated UID
*/
private static final long serialVersionUID = 8083622843635168388L;
@Override
public final void accept(Context ctx) {
ctx.visit(lhs).sql(" @> ").visit(rhs());
}
@Override
public final Clause[] clauses(Context ctx) {
return CLAUSES;
}
private final Field rhs() {
return (rhs == null) ? val(value, lhs) : rhs;
}
}
}