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/*-
* ============LICENSE_START=======================================================
* ONAP
* ================================================================================
* Copyright (C) 2019 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.policy.pdp.xacml.application.common.std;
import com.att.research.xacml.api.AttributeValue;
import com.att.research.xacml.api.DataType;
import com.att.research.xacml.api.DataTypeException;
import com.att.research.xacml.api.DataTypeFactory;
import com.att.research.xacml.api.Request;
import com.att.research.xacml.api.XACML3;
import com.att.research.xacml.std.IdentifierImpl;
import com.att.research.xacml.std.StdMutableAttribute;
import com.att.research.xacml.std.StdMutableRequest;
import com.att.research.xacml.std.StdMutableRequestAttributes;
import com.att.research.xacml.std.annotations.RequestParser;
import com.att.research.xacml.std.annotations.XACMLAction;
import com.att.research.xacml.std.annotations.XACMLRequest;
import com.att.research.xacml.std.annotations.XACMLSubject;
import com.att.research.xacml.util.FactoryException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Map;
import java.util.Map.Entry;
import lombok.Getter;
import lombok.Setter;
import lombok.ToString;
import org.onap.policy.models.decisions.concepts.DecisionRequest;
import org.onap.policy.pdp.xacml.application.common.ToscaDictionary;
import org.onap.policy.pdp.xacml.application.common.XacmlApplicationException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@Getter
@Setter
@ToString
@XACMLRequest(ReturnPolicyIdList = true)
public class StdMatchablePolicyRequest {
private static final Logger LOGGER = LoggerFactory.getLogger(StdMatchablePolicyRequest.class);
public static final String POLICY_TYPE_KEY = "policy-type";
@XACMLSubject(includeInResults = true)
private String onapName;
@XACMLSubject(attributeId = "urn:org:onap:onap-component", includeInResults = true)
private String onapComponent;
@XACMLSubject(attributeId = "urn:org:onap:onap-instance", includeInResults = true)
private String onapInstance;
@XACMLAction()
private String action;
protected static DataTypeFactory dataTypeFactory = null;
public StdMatchablePolicyRequest() {
super();
}
protected static synchronized DataTypeFactory getDataTypeFactory() {
try {
if (dataTypeFactory != null) {
return dataTypeFactory;
}
dataTypeFactory = DataTypeFactory.newInstance();
} catch (FactoryException e) {
LOGGER.error("Can't get Data type Factory: {}", e);
}
return dataTypeFactory;
}
/**
* Parses the DecisionRequest into a MonitoringRequest.
*
* @param decisionRequest Input DecisionRequest
* @return Request XACML Request object
* @throws XacmlApplicationException Exception occurred parsing or creating request
*/
@SuppressWarnings({"rawtypes", "unchecked"})
public static Request createInstance(DecisionRequest decisionRequest) throws XacmlApplicationException {
//
// Create our request object
//
StdMatchablePolicyRequest request = new StdMatchablePolicyRequest();
//
// Add the subject attributes
//
request.onapName = decisionRequest.getOnapName();
request.onapComponent = decisionRequest.getOnapComponent();
request.onapInstance = decisionRequest.getOnapInstance();
//
// Add the action attribute
//
request.action = decisionRequest.getAction();
//
// Parse the request - we use the annotations to create a
// basic XACML request.
//
Request xacmlRequest;
try {
xacmlRequest = RequestParser.parseRequest(request);
} catch (IllegalAccessException | DataTypeException e) {
throw new XacmlApplicationException("Could not parse request ", e);
}
//
// Create an object we can add to
//
StdMutableRequest mutableRequest = new StdMutableRequest(xacmlRequest);
StdMutableRequestAttributes resourceAttributes = new StdMutableRequestAttributes();
resourceAttributes.setCategory(XACML3.ID_ATTRIBUTE_CATEGORY_RESOURCE);
//
// Add the resource attributes
//
Map<String, Object> resources = decisionRequest.getResource();
for (Entry<String, Object> entrySet : resources.entrySet()) {
//
// Check for special policy-type
//
String attributeId;
if (POLICY_TYPE_KEY.equals(entrySet.getKey())) {
attributeId = ToscaDictionary.ID_RESOURCE_POLICY_TYPE.stringValue();
} else {
attributeId = ToscaDictionary.ID_RESOURCE_MATCHABLE + entrySet.getKey();
}
//
// Making an assumption that these fields are matchable.
// Its possible we may have to load the policy type model
// and use that to validate the fields that are matchable.
//
try {
if (entrySet.getValue() instanceof Collection) {
addResources(resourceAttributes, (Collection) entrySet.getValue(), attributeId);
} else {
addResources(resourceAttributes, Arrays.asList(entrySet.getValue().toString()), attributeId);
}
} catch (DataTypeException e) {
throw new XacmlApplicationException("Failed to add resource ", e);
}
}
mutableRequest.add(resourceAttributes);
return mutableRequest;
}
private static StdMutableRequestAttributes addResources(StdMutableRequestAttributes attributes,
Collection<Object> values, String id) throws DataTypeException {
DataTypeFactory factory = getDataTypeFactory();
if (factory == null) {
return null;
}
for (Object value : values) {
StdMutableAttribute mutableAttribute = new StdMutableAttribute();
mutableAttribute.setCategory(XACML3.ID_ATTRIBUTE_CATEGORY_RESOURCE);
mutableAttribute.setAttributeId(new IdentifierImpl(id));
mutableAttribute.setIncludeInResults(true);
DataType<?> dataTypeExtended = factory.getDataType(XACML3.ID_DATATYPE_STRING);
AttributeValue<?> attributeValue = dataTypeExtended.createAttributeValue(value);
Collection<AttributeValue<?>> attributeValues = new ArrayList<>();
attributeValues.add(attributeValue);
mutableAttribute.setValues(attributeValues);
attributes.add(mutableAttribute);
}
return attributes;
}
}
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