Many resources are needed to download a project. Please understand that we have to compensate our server costs. Thank you in advance. Project price only 1 $
You can buy this project and download/modify it how often you want.
/*
* 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.RenderContext;
import javax.persistence.criteria.Expression;
import java.util.List;
/**
* @author Christian Beikov
* @since 1.2.0
*/
public class AggregationFunction extends FunctionExpressionImpl {
private static final long serialVersionUID = 1L;
public AggregationFunction(BlazeCriteriaBuilderImpl criteriaBuilder, Class returnType, String functionName, Expression argument) {
super(criteriaBuilder, returnType, functionName, argument);
}
/**
* @author Christian Beikov
* @since 1.2.0
*/
public static class COUNT extends AggregationFunction {
private static final long serialVersionUID = 1L;
private static final String NAME = "COUNT";
private final boolean distinct;
public COUNT(BlazeCriteriaBuilderImpl criteriaBuilder, Expression expression, boolean distinct) {
super(criteriaBuilder, Long.class, NAME, expression);
this.distinct = distinct;
}
@Override
public void render(RenderContext context) {
final StringBuilder buffer = context.getBuffer();
if (isDistinct()) {
List> args = getArgumentExpressions();
buffer.append(getFunctionName()).append('(');
for (int i = 0; i < args.size(); i++) {
if (i != 0) {
buffer.append(',');
} else {
buffer.append("DISTINCT ");
}
context.apply(args.get(i));
}
buffer.append(')');
} else {
super.render(context);
}
}
public boolean isDistinct() {
return distinct;
}
}
/**
* @author Christian Beikov
* @since 1.2.0
*/
public static class AVG extends AggregationFunction {
private static final long serialVersionUID = 1L;
private static final String NAME = "AVG";
public AVG(BlazeCriteriaBuilderImpl criteriaBuilder, Expression expression) {
super(criteriaBuilder, Double.class, NAME, expression);
}
}
/**
* @author Christian Beikov
* @since 1.2.0
*/
public static class SUM extends AggregationFunction {
private static final long serialVersionUID = 1L;
private static final String NAME = "SUM";
@SuppressWarnings({"unchecked"})
public SUM(BlazeCriteriaBuilderImpl criteriaBuilder, Expression expression) {
super(criteriaBuilder, (Class) expression.getJavaType(), NAME, expression);
setJavaType(expression.getJavaType());
}
public SUM(BlazeCriteriaBuilderImpl criteriaBuilder, Expression expression, Class returnType) {
super(criteriaBuilder, returnType, NAME, expression);
setJavaType(returnType);
}
}
/**
* @author Christian Beikov
* @since 1.2.0
*/
public static class MIN extends AggregationFunction {
private static final long serialVersionUID = 1L;
private static final String NAME = "MIN";
@SuppressWarnings({"unchecked"})
public MIN(BlazeCriteriaBuilderImpl criteriaBuilder, Expression expression) {
super(criteriaBuilder, (Class) expression.getJavaType(), NAME, expression);
}
}
/**
* @author Christian Beikov
* @since 1.2.0
*/
public static class MAX extends AggregationFunction {
private static final long serialVersionUID = 1L;
private static final String NAME = "MAX";
@SuppressWarnings({"unchecked"})
public MAX(BlazeCriteriaBuilderImpl criteriaBuilder, Expression expression) {
super(criteriaBuilder, (Class) expression.getJavaType(), NAME, expression);
}
}
/**
* @author Christian Beikov
* @since 1.2.0
*/
public static class LEAST> extends AggregationFunction {
private static final long serialVersionUID = 1L;
private static final String NAME = "MIN";
@SuppressWarnings({"unchecked"})
public LEAST(BlazeCriteriaBuilderImpl criteriaBuilder, Expression expression) {
super(criteriaBuilder, (Class) expression.getJavaType(), NAME, expression);
}
}
/**
* @author Christian Beikov
* @since 1.2.0
*/
public static class GREATEST> extends AggregationFunction {
private static final long serialVersionUID = 1L;
private static final String NAME = "MAX";
@SuppressWarnings({"unchecked"})
public GREATEST(BlazeCriteriaBuilderImpl criteriaBuilder, Expression expression) {
super(criteriaBuilder, (Class) expression.getJavaType(), NAME, expression);
}
}
}
