org.tinygroup.tinysqldsl.expression.SignedExpression 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;
import org.tinygroup.tinysqldsl.base.StatementSqlBuilder;
/**
* It represents a "-" or "+" before an expression
*/
public class SignedExpression implements Expression {
private char sign;
private Expression expression;
public SignedExpression(char sign, Expression expression) {
setSign(sign);
setExpression(expression);
}
public char getSign() {
return sign;
}
public final void setSign(char sign) {
this.sign = sign;
if (sign != '+' && sign != '-') {
throw new IllegalArgumentException(
"illegal sign character, only + - allowed");
}
}
public Expression getExpression() {
return expression;
}
public final void setExpression(Expression expression) {
this.expression = expression;
}
public String toString() {
return getSign() + expression.toString();
}
public void builderExpression(StatementSqlBuilder builder) {
StringBuilder buffer = builder.getStringBuilder();
buffer.append(getSign());
getExpression().builderExpression(builder);
}
}