Add OR operator to cps-path

Issue-ID: CPS-1215
Change-Id: I91fdf5bddcc4fc12a8cf9dbce75f77c832c55871
Signed-off-by: Rudrangi Anupriya <ra00745022@techmahindra.com>

4 files changed, 85 insertions, 11 deletions

diff --git a/cps-path-parser/src/main/antlr4/org/onap/cps/cpspath/parser/antlr4/CpsPath.g4 b/cps-path-parser/src/main/antlr4/org/onap/cps/cpspath/parser/antlr4/CpsPath.g4
index db09b3c532..d4718111f6 100644
--- a/cps-path-parser/src/main/antlr4/org/onap/cps/cpspath/parser/antlr4/CpsPath.g4
+++ b/cps-path-parser/src/main/antlr4/org/onap/cps/cpspath/parser/antlr4/CpsPath.g4
@@ -1,6 +1,7 @@
 /*
  *  ============LICENSE_START=======================================================
  *  Copyright (C) 2021-2022 Nordix Foundation
+ *  Modifications Copyright (C) 2023 TechMahindra Ltd
  *  ================================================================================
  *  Licensed under the Apache License, Version 2.0 (the "License");
  *  you may not use this file except in compliance with the License.
@@ -40,14 +41,16 @@ yangElement : containerName listElementRef? ;
 
 containerName : QName ;
 
-listElementRef :  OB leafCondition ( KW_AND leafCondition)* CB ;
+listElementRef :  OB leafCondition ( booleanOperators leafCondition)* CB ;
 
-multipleLeafConditions : OB leafCondition ( KW_AND leafCondition)* CB ;
+multipleLeafConditions : OB leafCondition ( booleanOperators leafCondition)* CB ;
 
 leafCondition : AT leafName EQ ( IntegerLiteral | StringLiteral) ;
 
 leafName : QName ;
 
+booleanOperators : ( KW_AND | KW_OR ) ;
+
 invalidPostFix : (AT | CB | COLONCOLON | EQ ).+ ;
 
 /*
@@ -68,6 +71,7 @@ SLASH : '/' ;
 KW_ANCESTOR : 'ancestor' ;
 KW_AND : 'and' ;
 KW_TEXT_FUNCTION: 'text()' ;
+KW_OR : 'or' ;
 
 IntegerLiteral : FragDigits ;
 // Add below type definitions for leafvalue comparision in https://jira.onap.org/browse/CPS-440
diff --git a/cps-path-parser/src/main/java/org/onap/cps/cpspath/parser/CpsPathBooleanOperatorType.java b/cps-path-parser/src/main/java/org/onap/cps/cpspath/parser/CpsPathBooleanOperatorType.java
new file mode 100644
index 0000000000..b2f1dddb19
--- /dev/null
+++ b/cps-path-parser/src/main/java/org/onap/cps/cpspath/parser/CpsPathBooleanOperatorType.java
@@ -0,0 +1,51 @@
+/*

+ *  ============LICENSE_START=======================================================

+ *  Copyright (C) 2023 TechMahindra Ltd

+ *  ================================================================================

+ *  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.cps.cpspath.parser;

+

+public enum CpsPathBooleanOperatorType {

+    AND("and"),

+    OR("or");

+

+    private final String operatorValue;

+

+    CpsPathBooleanOperatorType(final String operatorValue) {

+        this.operatorValue = operatorValue;

+    }

+

+    public String getValues() {

+        return this.operatorValue;

+    }

+

+    /**

+     * Finds the value of the given enumeration.

+     *

+     * @param operatorValue value of the enum

+     * @return a booleanOperatorType

+     */

+    public static CpsPathBooleanOperatorType fromString(final String operatorValue) {

+        for (final CpsPathBooleanOperatorType booleanOperatorType : CpsPathBooleanOperatorType.values()) {

+            if (booleanOperatorType.operatorValue.equalsIgnoreCase(operatorValue)) {

+                return booleanOperatorType;

+            }

+        }

+        return null;

+    }

+}

diff --git a/cps-path-parser/src/main/java/org/onap/cps/cpspath/parser/CpsPathBuilder.java b/cps-path-parser/src/main/java/org/onap/cps/cpspath/parser/CpsPathBuilder.java
index 3a9d70ebbc..4299d13081 100644
--- a/cps-path-parser/src/main/java/org/onap/cps/cpspath/parser/CpsPathBuilder.java
+++ b/cps-path-parser/src/main/java/org/onap/cps/cpspath/parser/CpsPathBuilder.java
@@ -1,6 +1,7 @@
 /*
  *  ============LICENSE_START=======================================================
  *  Copyright (C) 2021-2022 Nordix Foundation
+ *  Modifications Copyright (C) 2023 TechMahindra Ltd
  *  ================================================================================
  *  Licensed under the Apache License, Version 2.0 (the "License");
  *  you may not use this file except in compliance with the License.
@@ -24,8 +25,10 @@ import static org.onap.cps.cpspath.parser.CpsPathPrefixType.DESCENDANT;
 
 import java.util.ArrayList;
 import java.util.HashMap;
+import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
+import java.util.Queue;
 import org.onap.cps.cpspath.parser.antlr4.CpsPathBaseListener;
 import org.onap.cps.cpspath.parser.antlr4.CpsPathParser;
 import org.onap.cps.cpspath.parser.antlr4.CpsPathParser.AncestorAxisContext;
@@ -54,6 +57,10 @@ public class CpsPathBuilder extends CpsPathBaseListener {
 
     private List<String> containerNames = new ArrayList<>();
 
+    final List<String> booleanOperators = new ArrayList<>();
+
+    final Queue<String> booleanOperatorsQueue = new LinkedList<>();
+
     @Override
     public void exitInvalidPostFix(final CpsPathParser.InvalidPostFixContext ctx) {
         throw new PathParsingException(ctx.getText());
@@ -90,13 +97,23 @@ public class CpsPathBuilder extends CpsPathBaseListener {
             throw new PathParsingException("Unsupported comparison value encountered in expression" + ctx.getText());
         }
         leavesData.put(ctx.leafName().getText(), comparisonValue);
-        appendCondition(normalizedXpathBuilder, ctx.leafName().getText(), comparisonValue);
+        final String booleanOperator = booleanOperatorsQueue.poll();
+        appendCondition(normalizedXpathBuilder, ctx.leafName().getText(), booleanOperator, comparisonValue);
         if (processingAncestorAxis) {
-            appendCondition(normalizedAncestorPathBuilder, ctx.leafName().getText(), comparisonValue);
+            appendCondition(normalizedAncestorPathBuilder, ctx.leafName().getText(), booleanOperator, comparisonValue);
         }
     }
 
     @Override
+    public void exitBooleanOperators(final CpsPathParser.BooleanOperatorsContext ctx) {
+        final CpsPathBooleanOperatorType cpsPathBooleanOperatorType = CpsPathBooleanOperatorType.fromString(
+                ctx.getText());
+        booleanOperators.add(cpsPathBooleanOperatorType.getValues());
+        booleanOperatorsQueue.add(cpsPathBooleanOperatorType.getValues());
+        cpsPathQuery.setBooleanOperatorsType(booleanOperators);
+    }
+
+    @Override
     public void exitDescendant(final DescendantContext ctx) {
         cpsPathQuery.setCpsPathPrefixType(DESCENDANT);
         cpsPathQuery.setDescendantName(normalizedXpathBuilder.substring(1));
@@ -170,13 +187,13 @@ public class CpsPathBuilder extends CpsPathBaseListener {
     }
 
     private void appendCondition(final StringBuilder currentNormalizedPathBuilder, final String name,
-                                final Object value) {
+                                 final String booleanOperator, final Object value) {
         final char lastCharacter = currentNormalizedPathBuilder.charAt(currentNormalizedPathBuilder.length() - 1);
-        currentNormalizedPathBuilder.append(lastCharacter == '[' ? "" : " and ")
-                .append("@")
-                .append(name)
-                .append("='")
-                .append(value)
-                .append("'");
+        currentNormalizedPathBuilder.append(lastCharacter == '[' ? "" : " " + booleanOperator + " ")
+                                    .append("@")
+                                    .append(name)
+                                    .append("='")
+                                    .append(value)
+                                    .append("'");
     }
 }
diff --git a/cps-path-parser/src/main/java/org/onap/cps/cpspath/parser/CpsPathQuery.java b/cps-path-parser/src/main/java/org/onap/cps/cpspath/parser/CpsPathQuery.java
index 3985455263..2c96d91051 100644
--- a/cps-path-parser/src/main/java/org/onap/cps/cpspath/parser/CpsPathQuery.java
+++ b/cps-path-parser/src/main/java/org/onap/cps/cpspath/parser/CpsPathQuery.java
@@ -1,6 +1,7 @@
 /*
  *  ============LICENSE_START=======================================================
  *  Copyright (C) 2021-2023 Nordix Foundation
+ *  Modifications Copyright (C) 2023 TechMahindra Ltd
  *  ================================================================================
  *  Licensed under the Apache License, Version 2.0 (the "License");
  *  you may not use this file except in compliance with the License.
@@ -42,6 +43,7 @@ public class CpsPathQuery {
     private String ancestorSchemaNodeIdentifier = "";
     private String textFunctionConditionLeafName;
     private String textFunctionConditionValue;
+    private List<String> booleanOperatorsType;
 
     /**
      * Returns a cps path query.