Use re2j pattern for sonar vulnerabilities

Issue-ID: POLICY-3289
Signed-off-by: jhh <jorge.hernandez-herrero@att.com>
Change-Id: Id6d58b5c8ac5f7715286f21274ccf5eea9155fd2

4 files changed, 28 insertions, 27 deletions

diff --git a/feature-lifecycle/src/main/java/org/onap/policy/drools/lifecycle/LifecycleFsm.java b/feature-lifecycle/src/main/java/org/onap/policy/drools/lifecycle/LifecycleFsm.java
index 5882025a..0e602ec5 100644
--- a/feature-lifecycle/src/main/java/org/onap/policy/drools/lifecycle/LifecycleFsm.java
+++ b/feature-lifecycle/src/main/java/org/onap/policy/drools/lifecycle/LifecycleFsm.java
@@ -21,6 +21,7 @@
 
 package org.onap.policy.drools.lifecycle;
 
+import com.google.re2j.Pattern;
 import java.lang.reflect.InvocationTargetException;
 import java.time.Instant;
 import java.util.ArrayList;
@@ -82,6 +83,7 @@ public class LifecycleFsm implements Startable {
     public static final long DEFAULT_STATUS_TIMER_SECONDS = 120L;
 
     private static final Logger logger = LoggerFactory.getLogger(LifecycleFsm.class);
+    private static final Pattern COMMA_SPACE_PAT = Pattern.compile("\\s*,\\s*");
 
     protected static final String CONFIGURATION_PROPERTIES_NAME = "feature-lifecycle";
     protected static final String GROUP_NAME = "lifecycle.pdp.group";
@@ -171,7 +173,7 @@ public class LifecycleFsm implements Startable {
 
         String commaSeparatedPolicyTypes = properties.getProperty(MANDATORY_POLICY_TYPES);
         if (!StringUtils.isBlank(commaSeparatedPolicyTypes)) {
-            Collections.addAll(mandatoryPolicyTypes, commaSeparatedPolicyTypes.split("\\s*,\\s*"));
+            Collections.addAll(mandatoryPolicyTypes, COMMA_SPACE_PAT.split(commaSeparatedPolicyTypes));
         }
 
         logger.info("The mandatory Policy Types are {}. Compliance is {}",
diff --git a/feature-mdc-filters/src/main/java/org/onap/policy/drools/mdc/filters/MdcTopicFilter.java b/feature-mdc-filters/src/main/java/org/onap/policy/drools/mdc/filters/MdcTopicFilter.java
index b66c254a..4ebe18e1 100755
--- a/feature-mdc-filters/src/main/java/org/onap/policy/drools/mdc/filters/MdcTopicFilter.java
+++ b/feature-mdc-filters/src/main/java/org/onap/policy/drools/mdc/filters/MdcTopicFilter.java
@@ -1,8 +1,8 @@
 /*
  * ============LICENSE_START=======================================================
- * feature-mdc-filters
+ * ONAP
  * ================================================================================
- * Copyright (C) 2019 AT&T Intellectual Property. All rights reserved.
+ * Copyright (C) 2019, 2021 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.
@@ -20,13 +20,14 @@
 
 package org.onap.policy.drools.mdc.filters;
 
-import com.att.aft.dme2.internal.apache.commons.lang3.StringUtils;
+import com.google.re2j.Pattern;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import lombok.Getter;
+import org.apache.commons.lang3.StringUtils;
 import org.onap.policy.drools.protocol.coders.JsonProtocolFilter;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -34,11 +35,13 @@ import org.slf4j.LoggerFactory;
 public class MdcTopicFilter {
 
     private static final Logger logger = LoggerFactory.getLogger(MdcTopicFilter.class);
+    private static final Pattern COMMA_SPACE_PAT = Pattern.compile("\\s*,\\s*");
+    private static final Pattern EQUAL_PAT = Pattern.compile("\\s*=\\s*");
 
     public static final String MDC_KEY_ERROR = "mdcKey must be provided";
     public static final String JSON_PATH_ERROR = "json path(s) must be provided";
 
-    private Map<String, FilterRule> rules = new HashMap<>();
+    private final Map<String, FilterRule> rules = new HashMap<>();
 
     @Getter
     public static class FilterRule {
@@ -91,14 +94,14 @@ public class MdcTopicFilter {
     }
 
     protected MdcTopicFilter(String rawFilters) {
-        for (String filter : rawFilters.split("\\s*,\\s*")) {
-            FilterRule rule = createFilterRule(filter);
+        for (String filter : COMMA_SPACE_PAT.split(rawFilters)) {
+            var rule = createFilterRule(filter);
             rules.put(rule.mdcKey, rule);
         }
     }
 
     private FilterRule createFilterRule(String filter) {
-        String[] filterKeyPaths = filter.split("\\s*=\\s*");
+        String[] filterKeyPaths = EQUAL_PAT.split(filter);
         if (filterKeyPaths.length != 2) {
             throw new IllegalArgumentException("could not parse filter rule");
         }
@@ -165,7 +168,7 @@ public class MdcTopicFilter {
             throw new IllegalArgumentException("a filter rule already exists for key: " + mdcKey);
         }
 
-        FilterRule rule = new FilterRule(mdcKey, paths);
+        var rule = new FilterRule(mdcKey, paths);
         rules.put(mdcKey, rule);
         return rule;
     }
diff --git a/policy-management/src/main/java/org/onap/policy/drools/controller/IndexedDroolsControllerFactory.java b/policy-management/src/main/java/org/onap/policy/drools/controller/IndexedDroolsControllerFactory.java
index d2196680..810cb65b 100644
--- a/policy-management/src/main/java/org/onap/policy/drools/controller/IndexedDroolsControllerFactory.java
+++ b/policy-management/src/main/java/org/onap/policy/drools/controller/IndexedDroolsControllerFactory.java
@@ -2,7 +2,7 @@
  * ============LICENSE_START=======================================================
  * ONAP
  * ================================================================================
- * Copyright (C) 2019-2020 AT&T Intellectual Property. All rights reserved.
+ * Copyright (C) 2019-2021 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.
@@ -20,12 +20,13 @@
 
 package org.onap.policy.drools.controller;
 
+import com.google.re2j.Pattern;
 import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Properties;
+import lombok.NonNull;
 import org.onap.policy.common.endpoints.event.comm.Topic;
 import org.onap.policy.common.endpoints.event.comm.Topic.CommInfrastructure;
 import org.onap.policy.common.endpoints.event.comm.TopicSink;
@@ -49,10 +50,8 @@ import org.slf4j.LoggerFactory;
  */
 class IndexedDroolsControllerFactory implements DroolsControllerFactory {
 
-    /**
-     * logger.
-     */
     private static final Logger logger = LoggerFactory.getLogger(IndexedDroolsControllerFactory.class);
+    private static final Pattern COMMA_SPACE_PAT = Pattern.compile("\\s*,\\s*");
 
     /**
      * Policy Controller Name Index.
@@ -299,13 +298,10 @@ class IndexedDroolsControllerFactory implements DroolsControllerFactory {
     }
 
     private List<PotentialCoderFilter> getFilterExpressions(Properties properties, String propertyPrefix,
-                    String eventClasses) {
+                    @NonNull String eventClasses) {
 
         List<PotentialCoderFilter> classes2Filters = new ArrayList<>();
-
-        List<String> topicClasses = new ArrayList<>(Arrays.asList(eventClasses.split("\\s*,\\s*")));
-
-        for (String theClass : topicClasses) {
+        for (String theClass : COMMA_SPACE_PAT.split(eventClasses)) {
 
             // 4. for each coder class, get the filter expression
 
diff --git a/policy-management/src/main/java/org/onap/policy/drools/system/internal/AggregatedPolicyController.java b/policy-management/src/main/java/org/onap/policy/drools/system/internal/AggregatedPolicyController.java
index e14b1620..44b07a5c 100644
--- a/policy-management/src/main/java/org/onap/policy/drools/system/internal/AggregatedPolicyController.java
+++ b/policy-management/src/main/java/org/onap/policy/drools/system/internal/AggregatedPolicyController.java
@@ -2,7 +2,7 @@
  * ============LICENSE_START=======================================================
  * ONAP
  * ================================================================================
- * Copyright (C) 2017-2020 AT&T Intellectual Property. All rights reserved.
+ * Copyright (C) 2017-2021 AT&T Intellectual Property. All rights reserved.
  * Modifications Copyright (C) 2021 Nordix Foundation.
  * ================================================================================
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -21,8 +21,8 @@
 
 package org.onap.policy.drools.system.internal;
 
+import com.google.re2j.Pattern;
 import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Properties;
@@ -64,6 +64,7 @@ public class AggregatedPolicyController implements PolicyController, TopicListen
      * Logger.
      */
     private static final Logger logger = LoggerFactory.getLogger(AggregatedPolicyController.class);
+    private static final Pattern COMMA_SPACE_PAT = Pattern.compile("\\s*,\\s*");
 
     /**
      * identifier for this policy controller.
@@ -111,14 +112,14 @@ public class AggregatedPolicyController implements PolicyController, TopicListen
     /**
      * Policy Types.
      */
-    private List<ToscaConceptIdentifier> policyTypes;
+    private final List<ToscaConceptIdentifier> policyTypes;
 
     /**
      * Constructor version mainly used for bootstrapping at initialization time a policy engine
      * controller.
      *
      * @param name controller name
-     * @param properties
+     * @param properties controller properties
      *
      * @throws IllegalArgumentException when invalid arguments are provided
      */
@@ -170,8 +171,7 @@ public class AggregatedPolicyController implements PolicyController, TopicListen
             return policyTypeIds;
         }
 
-        List<String> ptiPropList = new ArrayList<>(Arrays.asList(ptiPropValue.split("\\s*,\\s*")));
-        for (String pti : ptiPropList) {
+        for (String pti : COMMA_SPACE_PAT.split(ptiPropValue)) {
             String[] ptv = pti.split(":");
             if (ptv.length == 1) {
                 policyTypeIds.add(new ToscaConceptIdentifier(ptv[0],
@@ -217,7 +217,7 @@ public class AggregatedPolicyController implements PolicyController, TopicListen
     @Override
     public boolean updateDrools(DroolsConfiguration newDroolsConfiguration) {
         DroolsController controller = this.droolsController.get();
-        DroolsConfiguration oldDroolsConfiguration = new DroolsConfiguration(controller.getArtifactId(),
+        var oldDroolsConfiguration = new DroolsConfiguration(controller.getArtifactId(),
                 controller.getGroupId(), controller.getVersion());
 
         if (oldDroolsConfiguration.getGroupId().equalsIgnoreCase(newDroolsConfiguration.getGroupId())
@@ -242,7 +242,7 @@ public class AggregatedPolicyController implements PolicyController, TopicListen
             DroolsControllerConstants.getFactory().destroy(controller);
         }
 
-        boolean success = true;
+        var success = true;
         try {
             this.properties.setProperty(DroolsPropertyConstants.RULES_GROUPID, newDroolsConfiguration.getGroupId());
             this.properties.setProperty(DroolsPropertyConstants.RULES_ARTIFACTID,