org.tinygroup.tinysqldsl.expression.relational.IsEmptyExpression Maven / Gradle / Ivy
/**
* Copyright (c) 1997-2013, www.tinygroup.org ([email protected]).
*
* Licensed under the GPL, Version 3.0 (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.gnu.org/licenses/gpl.html
*
* 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.tinygroup.tinysqldsl.expression.relational;
import org.tinygroup.tinysqldsl.base.StatementSqlBuilder;
import org.tinygroup.tinysqldsl.expression.Expression;
public class IsEmptyExpression implements Expression {
private Expression leftExpression;
private boolean not = false;
public IsEmptyExpression(Expression leftExpression) {
this(leftExpression, false);
}
public IsEmptyExpression(Expression leftExpression, boolean not) {
super();
this.leftExpression = leftExpression;
this.not = not;
}
public Expression getLeftExpression() {
return leftExpression;
}
public void setLeftExpression(Expression expression) {
leftExpression = expression;
}
public boolean isNot() {
return not;
}
public void setNot(boolean b) {
not = b;
}
public String toString() {
return leftExpression + ((not) ? "<>" : "=") + "''";
}
public void builderExpression(StatementSqlBuilder builder) {
StringBuilder buffer = builder.getStringBuilder();
getLeftExpression().builderExpression(builder);
if (isNot()) {
buffer.append("<>''");
} else {
buffer.append("=''");
}
}
}