com.blazebit.persistence.criteria.impl.expression.function.TrimFunction 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.CriteriaBuilder.Trimspec;
import javax.persistence.criteria.Expression;
/**
* @author Christian Beikov
* @since 1.2.0
*/
public class TrimFunction extends AbstractFunctionExpression {
public static final String NAME = "TRIM";
public static final Trimspec DEFAULT_TRIMSPEC = Trimspec.BOTH;
public static final char DEFAULT_TRIM_CHAR = ' ';
private static final long serialVersionUID = 1L;
private final Trimspec trimspec;
private final Expression trimCharacter;
private final Expression trimSource;
public TrimFunction(BlazeCriteriaBuilderImpl criteriaBuilder, Trimspec trimspec, Expression trimCharacter, Expression trimSource) {
super(criteriaBuilder, String.class, NAME);
this.trimspec = trimspec;
this.trimCharacter = trimCharacter;
this.trimSource = trimSource;
}
public TrimFunction(BlazeCriteriaBuilderImpl criteriaBuilder, Trimspec trimspec, char trimCharacter, Expression trimSource) {
super(criteriaBuilder, String.class, NAME);
this.trimspec = trimspec;
this.trimCharacter = new LiteralExpression(criteriaBuilder, trimCharacter);
this.trimSource = trimSource;
}
public TrimFunction(BlazeCriteriaBuilderImpl criteriaBuilder, Expression trimSource) {
this(criteriaBuilder, DEFAULT_TRIMSPEC, DEFAULT_TRIM_CHAR, trimSource);
}
public TrimFunction(BlazeCriteriaBuilderImpl criteriaBuilder, Expression trimCharacter, Expression trimSource) {
this(criteriaBuilder, DEFAULT_TRIMSPEC, trimCharacter, trimSource);
}
public TrimFunction(BlazeCriteriaBuilderImpl criteriaBuilder, char trimCharacter, Expression trimSource) {
this(criteriaBuilder, DEFAULT_TRIMSPEC, trimCharacter, trimSource);
}
public TrimFunction(BlazeCriteriaBuilderImpl criteriaBuilder, Trimspec trimspec, Expression trimSource) {
this(criteriaBuilder, trimspec, DEFAULT_TRIM_CHAR, trimSource);
}
@Override
public void visitParameters(ParameterVisitor visitor) {
visitor.visit(trimCharacter);
visitor.visit(trimSource);
}
@Override
public void render(RenderContext context) {
final StringBuilder buffer = context.getBuffer();
buffer.append("TRIM(");
buffer.append(trimspec.name());
buffer.append(' ');
if (trimCharacter.getClass().isAssignableFrom(LiteralExpression.class)) {
// Use character as literal if possible because some databases don't support parameters for the character
buffer.append(((LiteralExpression) trimCharacter).getLiteral());
} else {
context.apply(trimCharacter);
}
buffer.append(" FROM ");
context.apply(trimSource);
buffer.append(')');
}
}