com.blazebit.persistence.criteria.impl.expression.function.ConcatFunction Maven / Gradle / Ivy
/*
* Copyright 2014 - 2020 Blazebit.
*
* 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 com.blazebit.persistence.criteria.impl.expression.function;
import com.blazebit.persistence.criteria.impl.BlazeCriteriaBuilderImpl;
import com.blazebit.persistence.criteria.impl.ParameterVisitor;
import com.blazebit.persistence.criteria.impl.RenderContext;
import com.blazebit.persistence.criteria.impl.expression.AbstractExpression;
import com.blazebit.persistence.criteria.impl.expression.LiteralExpression;
import javax.persistence.criteria.Expression;
/**
* @author Christian Beikov
* @since 1.2.0
*/
public class ConcatFunction extends AbstractExpression {
private static final long serialVersionUID = 1L;
private final Expression string1;
private final Expression string2;
public ConcatFunction(BlazeCriteriaBuilderImpl criteriaBuilder, Expression expression1, Expression expression2) {
super(criteriaBuilder, String.class);
this.string1 = expression1;
this.string2 = expression2;
}
public ConcatFunction(BlazeCriteriaBuilderImpl criteriaBuilder, Expression string1, String string2) {
this(criteriaBuilder, string1, wrap(criteriaBuilder, string2));
}
public ConcatFunction(BlazeCriteriaBuilderImpl criteriaBuilder, String string1, Expression string2) {
this(criteriaBuilder, wrap(criteriaBuilder, string1), string2);
}
private static Expression wrap(BlazeCriteriaBuilderImpl criteriaBuilder, String string) {
return new LiteralExpression(criteriaBuilder, string);
}
@Override
public void visitParameters(ParameterVisitor visitor) {
visitor.visit(string1);
visitor.visit(string2);
}
@Override
public void render(RenderContext context) {
final StringBuilder buffer = context.getBuffer();
buffer.append("CONCAT(");
context.apply(string1);
buffer.append(',');
context.apply(string2);
buffer.append(')');
}
}