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* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
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*
* http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.cayenne.ejbql.parser;
import java.util.HashMap;
import java.util.Map;
import org.apache.cayenne.ejbql.EJBQLExpressionVisitor;
/**
* @since 3.0
*/
public class EJBQLSum extends EJBQLAggregateColumn {
// per JPA spec, 4.8.4, SUM type mapping rules are a bit convoluted. Mapping
// them here...
private static final long serialVersionUID = 2256495371122671530L;
static final Map<String, String> typeMap;
static {
typeMap = new HashMap<>();
typeMap.put(Integer.class.getName(), Long.class.getName());
typeMap.put(Short.class.getName(), Long.class.getName());
typeMap.put(Float.class.getName(), Double.class.getName());
}
public EJBQLSum(int id) {
super(id);
}
@Override
protected boolean visitNode(EJBQLExpressionVisitor visitor) {
return visitor.visitSum(this);
}
@Override
public String getFunction() {
return "SUM";
}
@Override
public String getJavaType(String pathType) {
if (pathType == null) {
return "java.lang.Long";
}
// type map only contains mappings that are different from the attribute
// path, so
// if no mapping exists, return the argument passed to this method.
String mappedType = typeMap.get(pathType);
return mappedType != null ? mappedType : pathType;
}
}