package com.thinkbiganalytics.metadata.modeshape;
/*-
* #%L
* thinkbig-metadata-modeshape
* %%
* Copyright (C) 2017 ThinkBig Analytics
* %%
* 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.
* #L%
*/
import com.thinkbiganalytics.metadata.api.MetadataCriteria;
import com.thinkbiganalytics.metadata.modeshape.common.JcrObject;
import com.thinkbiganalytics.metadata.modeshape.support.JcrQueryUtil;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.jcr.RepositoryException;
import javax.jcr.Session;
import javax.jcr.query.QueryResult;
/**
*/
public abstract class AbstractMetadataCriteria<C extends MetadataCriteria<C>> implements MetadataCriteria<C> {
private int limit = -1;
@Override
public C limit(int size) {
this.limit = size;
return self();
}
@SuppressWarnings("unchecked")
protected C self() {
return (C) this;
}
public int getLimit() {
return limit;
}
@SuppressWarnings("unchecked")
public <E, J extends JcrObject> List<E> select(Session session, String typeName, Class<E> type, Class<J> jcrClass) {
HashMap<String, Object> params = new HashMap<>();
StringBuilder queryStr = new StringBuilder("select e.* from [" + typeName + "] as e ");
applyFilter(queryStr, params);
applyLimit(queryStr);
Map<String, String> bindParams = new HashMap<>();
for (Map.Entry<String, Object> entry : params.entrySet()) {
bindParams.put(entry.getKey(), entry.getValue() != null ? entry.getValue().toString() : null);
}
QueryResult result = null;
try {
result = JcrQueryUtil.query(session, queryStr.toString(), bindParams);
return (List<E>) JcrQueryUtil.queryResultToList(result, jcrClass);
} catch (RepositoryException e) {
throw new MetadataRepositoryException("Unable to execute Criteria Query for " + type + ". Query is: " + queryStr.toString(), e);
}
}
protected abstract void applyFilter(StringBuilder query, HashMap<String, Object> params);
protected void applyLimit(StringBuilder query) {
if (getLimit() >= 0) {
query.append("limit ").append(getLimit());
}
}
}