terrastore.store.conditions.JXPathCondition.java Source code

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Here is the source code for terrastore.store.conditions.JXPathCondition.java

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/**
 * Copyright 2009 - 2011 Sergio Bossa (sergio.bossa@gmail.com)
 *
 *    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 terrastore.store.conditions;

import java.util.List;
import java.util.Map;
import org.apache.commons.jxpath.JXPathContext;
import terrastore.store.operators.Condition;

/**
 * {@link terrastore.store.operators.Condition} implementation evaluating JXPath expressions
 * (see http://commons.apache.org/jxpath) over bucket values.<br/>
 * Keys are ignored.
 *
 * @author Sergio Bossa
 */
public class JXPathCondition implements Condition {

    @Override
    public boolean isSatisfied(String key, Map<String, Object> value, String expression) {
        JXPathContext context = JXPathContext.newContext(value);
        context.setLenient(true);
        List selection = context.selectNodes(expression);
        return selection != null && selection.size() > 0;
    }
}