agents-common/src/main/java/org/apache/ranger/plugin/conditionevaluator/RangerContextAttributeValueInCondition.java

/*
 * 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.ranger.plugin.conditionevaluator;

import org.apache.commons.collections.CollectionUtils;
import org.apache.commons.collections.MapUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.ranger.plugin.policyengine.RangerAccessRequest;

import java.util.Map;

public class RangerContextAttributeValueInCondition extends RangerAbstractConditionEvaluator {
	private static final Log LOG = LogFactory.getLog(RangerContextAttributeValueInCondition.class);

	protected String attributeName;

	@Override
	public void init() {
		if (LOG.isDebugEnabled()) {
			LOG.debug("==> RangerContextAttributeValueInCondition.init(" + condition + ")");
		}

		super.init();

		Map<String, String> evalOptions = conditionDef. getEvaluatorOptions();

		if (MapUtils.isNotEmpty(evalOptions)) {
			attributeName = evalOptions.get("attributeName");
		}

		if (LOG.isDebugEnabled()) {
			LOG.debug("<== RangerContextAttributeValueInCondition.init(" + condition + ")");
		}
	}

	@Override
	public boolean isMatched(RangerAccessRequest request) {
		if (LOG.isDebugEnabled()) {
			LOG.debug("==> RangerContextAttributeValueInCondition.isMatched(" + condition + ")");
		}

		boolean ret = true;

		if(attributeName != null && condition != null && CollectionUtils.isNotEmpty(condition.getValues())) {
			Object val = request.getContext().get(attributeName);

			if(val != null) {
				ret = condition.getValues().contains(val);
			}
		}

		if (LOG.isDebugEnabled()) {
			LOG.debug("<== RangerContextAttributeValueInCondition.isMatched(" + condition + "): " + ret);
		}

		return ret;
	}
}