org.springframework.data.gemfire.repository.query.QueryBuilder Maven / Gradle / Ivy
/*
* Copyright 2012 the original author or authors.
*
* 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 org.springframework.data.gemfire.repository.query;
import org.springframework.data.gemfire.mapping.GemfirePersistentEntity;
import org.springframework.data.repository.query.parser.PartTree;
import org.springframework.util.Assert;
/**
* The QueryBuilder class is used to build a QueryString.
*
* @author Oliver Gierke
* @author David Turanski
* @author John Blum
* @see org.springframework.data.gemfire.repository.query.QueryString
*/
class QueryBuilder {
static final String DEFAULT_ALIAS = "x";
private final String query;
public QueryBuilder(String source) {
Assert.hasText(source, "The OQL Query must be specified");
this.query = source;
}
public QueryBuilder(GemfirePersistentEntity entity, PartTree tree) {
this(String.format("SELECT%1$s * FROM /%2$s %3$s", (tree.isDistinct() ? " DISTINCT" : ""),
entity.getRegionName(), DEFAULT_ALIAS));
}
public QueryString create(Predicate predicate) {
return new QueryString(predicate != null ? String.format("%1$s WHERE %2$s", query,
predicate.toString(DEFAULT_ALIAS)) : query);
}
/*
* (non-Javadoc)
* @see java.lang.Object#toString()
*/
@Override
public String toString() {
return query;
}
}