1 files changed, 74 insertions, 0 deletions
diff --git a/common/onap-tosca-datatype/src/main/java/org/onap/sdc/tosca/datatypes/model/ScalarUnitValidator.java b/common/onap-tosca-datatype/src/main/java/org/onap/sdc/tosca/datatypes/model/ScalarUnitValidator.java
new file mode 100644
index 0000000000..d7e538e0a7
--- /dev/null
+++ b/common/onap-tosca-datatype/src/main/java/org/onap/sdc/tosca/datatypes/model/ScalarUnitValidator.java
@@ -0,0 +1,74 @@
+/*
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2019 Nordix Foundation
+ *  ================================================================================
+ *  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.sdc.tosca.datatypes.model;
+
+import java.util.Arrays;
+import java.util.regex.Pattern;
+import org.apache.commons.lang3.StringUtils;
+
+/**
+ * This Class is responsible for validating if a given value is a valid Tosca Scalar Unit Type.
+ */
+public class ScalarUnitValidator {
+
+    private static ScalarUnitValidator scalarUnitValidator = new ScalarUnitValidator();
+
+    /**
+     *  Tosca Scalar Unit Types structure.
+     */
+    private final Pattern pattern = Pattern.compile("\\d+\\s*[a-zA-Z]{1,3}");
+
+    private ScalarUnitValidator() {
+    }
+
+    public static ScalarUnitValidator getInstance() {
+        return scalarUnitValidator;
+    }
+
+    /**
+     * Validates if the given String matches with the Tosca Scalar Unit Types structure.
+     *
+     * @param value String to be validated.
+     * @return an {@Boolean}
+     */
+    public boolean isScalarUnit(final String value) {
+        if (value == null || value.isEmpty()) {
+            return true;
+        }
+
+        return pattern.matcher(value).matches();
+    }
+
+    /**
+     * Validates if the given String has a Recognized Tosca unit.
+     *
+     * @param value String to be validated
+     * @param enumClass Enum that represents a Tosca Scalar Unit Type.
+     * @param <E>
+     * @return an Enum that represents the Tosca Scalar Unit Type.
+     */
+    public <E extends Enum<E>> boolean isValueScalarUnit(final Object value, final Class<E> enumClass) {
+        final String stringToValidate = String.valueOf(value);
+        return isScalarUnit(stringToValidate) && Arrays.stream(StringUtils.split(stringToValidate))
+            .anyMatch(strValue -> Arrays.stream(enumClass.getEnumConstants())
+                .anyMatch(scalarUnit ->
+                    scalarUnit.name().equalsIgnoreCase(strValue) || strValue.endsWith(scalarUnit.name())));
+    }
+}