/*
* Copyright 2011, Mysema Ltd
*
* 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.mysema.query.jpa.impl;
import javax.persistence.Parameter;
import javax.persistence.Query;
import java.util.Map;
import com.mysema.query.types.ParamExpression;
import com.mysema.query.types.ParamNotSetException;
import com.mysema.query.types.expr.Param;
import com.mysema.util.MathUtils;
/**
* JPAUtil provides static utility methods for JPA
*
* @author tiwe
*
*/
public final class JPAUtil {
private JPAUtil() {}
public static void setConstants(Query query, Map<Object,String> constants, Map<ParamExpression<?>, Object> params) {
boolean hasParameters = !query.getParameters().isEmpty();
for (Map.Entry<Object,String> entry : constants.entrySet()) {
String key = entry.getValue();
Object val = entry.getKey();
if (Param.class.isInstance(val)) {
val = params.get(val);
if (val == null) {
throw new ParamNotSetException((Param<?>) entry.getKey());
}
}
if (hasParameters) {
Parameter parameter = query.getParameter(Integer.parseInt(key));
Class parameterType = parameter != null ? parameter.getParameterType() : null;
if (parameterType != null && !parameterType.isInstance(val)) {
if (val instanceof Number && Number.class.isAssignableFrom(parameterType)) {
val = MathUtils.cast((Number) val, parameterType);
}
}
}
query.setParameter(Integer.valueOf(key), val);
}
}
}