com.blazebit.persistence.criteria.impl.expression.function.LocateFunction Maven / Gradle / Ivy
/*
* Copyright 2014 - 2021 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.LiteralExpression;
import javax.persistence.criteria.Expression;
/**
* @author Christian Beikov
* @since 1.2.0
*/
public class LocateFunction extends AbstractFunctionExpression {
public static final String NAME = "LOCATE";
private static final long serialVersionUID = 1L;
private final Expression pattern;
private final Expression string;
private final Expression start;
public LocateFunction(BlazeCriteriaBuilderImpl criteriaBuilder, Expression pattern, Expression string, Expression start) {
super(criteriaBuilder, Integer.class, NAME);
this.pattern = pattern;
this.string = string;
this.start = start;
}
public LocateFunction(BlazeCriteriaBuilderImpl criteriaBuilder, Expression pattern, Expression string) {
this(criteriaBuilder, pattern, string, null);
}
public LocateFunction(BlazeCriteriaBuilderImpl criteriaBuilder, String pattern, Expression string) {
this(criteriaBuilder, new LiteralExpression(criteriaBuilder, pattern), string, null);
}
public LocateFunction(BlazeCriteriaBuilderImpl criteriaBuilder, String pattern, Expression string, int start) {
this(criteriaBuilder, new LiteralExpression(criteriaBuilder, pattern), string, new LiteralExpression(criteriaBuilder, start));
}
@Override
public void visitParameters(ParameterVisitor visitor) {
visitor.visit(pattern);
visitor.visit(start);
visitor.visit(string);
}
@Override
public void render(RenderContext context) {
final StringBuilder buffer = context.getBuffer();
buffer.append("LOCATE(");
context.apply(pattern);
buffer.append(',');
context.apply(string);
if (start != null) {
buffer.append(',');
context.apply(start);
}
buffer.append(')');
}
}