1 files changed, 86 insertions, 0 deletions
diff --git a/ONAP-PAP-REST/src/main/java/org/onap/policy/pap/xacml/rest/components/SafePolicyBuilder.java b/ONAP-PAP-REST/src/main/java/org/onap/policy/pap/xacml/rest/components/SafePolicyBuilder.java
new file mode 100644
index 000000000..ba5b0026a
--- /dev/null
+++ b/ONAP-PAP-REST/src/main/java/org/onap/policy/pap/xacml/rest/components/SafePolicyBuilder.java
@@ -0,0 +1,86 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP-PAP-REST
+ * ================================================================================
+ * Copyright (C) 2017 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.
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.policy.pap.xacml.rest.components;
+
+import java.util.List;
+import java.util.Map;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import org.onap.policy.common.logging.eelf.PolicyLogger;
+import org.onap.policy.controlloop.policy.guard.ControlLoopGuard;
+import org.yaml.snakeyaml.Yaml;
+import org.yaml.snakeyaml.constructor.Constructor;
+
+public class SafePolicyBuilder {
+	
+	private SafePolicyBuilder(){
+		//Private Constructor. 
+	}
+
+	public static ControlLoopGuard loadYamlGuard(String specification) {
+		//
+		// Read the yaml into our Java Object
+		//
+		PolicyLogger.info("Requested YAML to convert : " + specification);
+		Yaml yaml = new Yaml(new Constructor(ControlLoopGuard.class));
+		Object obj = yaml.load(specification);
+		return (ControlLoopGuard) obj;
+	}
+	
+	public static String generateXacmlGuard(String xacmlFileContent,Map<String, String> generateMap, List<String> blacklist, List<String> targets) {
+		//Setup default values and Targets. 
+		StringBuilder targetRegex= new StringBuilder(".*|");
+		if(targets!=null && !targets.isEmpty()){
+			targetRegex = new StringBuilder();
+            for(String t : targets){
+            	targetRegex.append(t + "|");
+            }
+		}
+		if(generateMap.get("clname")==null|| generateMap.get("clname").isEmpty()){
+			generateMap.put("clname",".*");
+		}
+		generateMap.put("targets", targetRegex.toString().substring(0, targetRegex.length()-1));
+		// Replace values. 
+		for(Map.Entry<String,String> map: generateMap.entrySet()){
+			Pattern p = Pattern.compile("\\$\\{" +map.getKey() +"\\}");
+			Matcher m = p.matcher(xacmlFileContent);
+			String finalInput = map.getValue();
+			if(finalInput.contains("$")){
+				finalInput = finalInput.replace("$", "\\$");
+			}
+			xacmlFileContent=m.replaceAll(finalInput);
+		}
+		if(blacklist!=null && !blacklist.isEmpty()){
+			StringBuilder rule = new StringBuilder();
+			for(String blackListName : blacklist){
+				if(blackListName.contains("$")){
+					blackListName = blackListName.replace("$", "\\$");
+				}
+				rule.append("<AttributeValue DataType=\"http://www.w3.org/2001/XMLSchema#string\">"+blackListName+"</AttributeValue>");
+			}
+			Pattern p = Pattern.compile("\\$\\{blackListElement\\}");
+			Matcher m = p.matcher(xacmlFileContent);
+			xacmlFileContent=m.replaceAll(rule.toString());
+		}
+		PolicyLogger.info("Generated XACML from the YAML Spec: \n" + xacmlFileContent);
+		return xacmlFileContent;
+	}
+}