/*****************************************************************
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* 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
* 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 org.apache.cayenne.query;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import org.apache.cayenne.ejbql.EJBQLCompiledExpression;
import org.apache.cayenne.map.EntityResolver;
import org.apache.cayenne.map.ObjEntity;
/**
* A metadata object for the {@link EJBQLQuery}.
*
* @since 3.0
*/
class EJBQLQueryMetadata extends BaseQueryMetadata {
boolean resolve(EntityResolver resolver, EJBQLQuery query) {
EJBQLCompiledExpression expression = query.getExpression(resolver);
setPrefetchTree(expression.getPrefetchTree());
resultSetMapping = expression.getResult() != null ? expression
.getResult()
.getResolvedComponents(resolver) : null;
ObjEntity root = expression.getRootDescriptor().getEntity();
if (super.resolve(root, resolver, null)) {
if (QueryCacheStrategy.NO_CACHE == getCacheStrategy()) {
}
else {
// create a unique key based on entity, EJBQL, and parameters
StringBuilder key = new StringBuilder();
if (query.getEjbqlStatement() != null) {
key.append('/').append(query.getEjbqlStatement());
}
if (query.getFetchLimit() > 0) {
key.append('/').append(query.getFetchLimit());
}
Map<String, Object> namedParameters = query.getNamedParameters();
if (!namedParameters.isEmpty()) {
List<String> keys = new ArrayList<String>(namedParameters.keySet());
Collections.sort(keys);
for (String parameterKey : keys) {
key.append('/').append(parameterKey).append('=').append(
namedParameters.get(parameterKey));
}
}
Map<Integer, Object> positionalParameters = query
.getPositionalParameters();
if (!positionalParameters.isEmpty()) {
List<Integer> keys = new ArrayList<Integer>(positionalParameters
.keySet());
Collections.sort(keys);
for (Integer parameterKey : keys) {
key.append('/').append(parameterKey).append('=').append(
positionalParameters.get(parameterKey));
}
}
this.cacheKey = key.toString();
}
return true;
}
return false;
}
}