Adding common utility classes to policy/common

* Adding HealthCheckReport class to policy/common for wider use
  among all policy modules.
* Adding utility class called ParameterValidationUtils for providing
  common validation methods to all policy modules. For now, it has only 3
  validation methods but we all can add more in future.

Change-Id: I363fe116ba74f25299fd71211be73505b3164f72
Issue-ID: POLICY-1035
Signed-off-by: ramverma <ram.krishna.verma@ericsson.com>

2 files changed, 125 insertions, 0 deletions

diff --git a/utils/src/main/java/org/onap/policy/common/utils/validation/ParameterValidationUtils.java b/utils/src/main/java/org/onap/policy/common/utils/validation/ParameterValidationUtils.java
new file mode 100644
index 00000000..e2e462da
--- /dev/null
+++ b/utils/src/main/java/org/onap/policy/common/utils/validation/ParameterValidationUtils.java
@@ -0,0 +1,68 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2018 Ericsson. 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.common.utils.validation;
+
+/**
+ * Class to provide utility methods for common parameter validations.
+ *
+ * @author Ram Krishna Verma (ram.krishna.verma@ericsson.com)
+ */
+public class ParameterValidationUtils {
+
+    /**
+     * Validates the given string input.
+     *
+     * @param inputString the string to validate
+     * @return the boolean validation result
+     */
+    public static boolean validateStringParameter(final String inputString) {
+        if (inputString == null || inputString.trim().length() == 0) {
+            return false;
+        }
+        return true;
+    }
+
+    /**
+     * Validates the given integer input.
+     *
+     * @param input the integer to validate
+     * @return the boolean validation result
+     */
+    public static boolean validateIntParameter(final int input) {
+        if (input <= 0) {
+            return false;
+        }
+        return true;
+    }
+
+    /**
+     * Validates the given long input.
+     *
+     * @param input the long to validate
+     * @return the boolean validation result
+     */
+    public static boolean validateLongParameter(final long input) {
+        if (input <= 0) {
+            return false;
+        }
+        return true;
+    }
+}
diff --git a/utils/src/test/java/org/onap/policy/common/utils/validation/TestParameterValidationUtils.java b/utils/src/test/java/org/onap/policy/common/utils/validation/TestParameterValidationUtils.java
new file mode 100644
index 00000000..d8c4c510
--- /dev/null
+++ b/utils/src/test/java/org/onap/policy/common/utils/validation/TestParameterValidationUtils.java
@@ -0,0 +1,57 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2018 Ericsson. 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.common.utils.validation;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+import org.junit.Test;
+
+/**
+ * Class to perform unit test of ParameterValidationUtils.
+ *
+ * @author Ram Krishna Verma (ram.krishna.verma@ericsson.com)
+ */
+public class TestParameterValidationUtils {
+
+    @Test
+    public void testValidateStringParameter() {
+        assertTrue(ParameterValidationUtils.validateStringParameter("Policy"));
+        assertFalse(ParameterValidationUtils.validateStringParameter(null));
+        assertFalse(ParameterValidationUtils.validateStringParameter(""));
+    }
+
+    @Test
+    public void testValidateIntParameter() {
+        assertTrue(ParameterValidationUtils.validateIntParameter(5555));
+        assertTrue(ParameterValidationUtils.validateIntParameter(new Integer(7777)));
+        assertFalse(ParameterValidationUtils.validateIntParameter(0));
+        assertFalse(ParameterValidationUtils.validateIntParameter(-1));
+    }
+
+    @Test
+    public void testValidateLongParameter() {
+        assertTrue(ParameterValidationUtils.validateLongParameter(5555L));
+        assertTrue(ParameterValidationUtils.validateLongParameter(new Long(7777L)));
+        assertFalse(ParameterValidationUtils.validateLongParameter(0L));
+        assertFalse(ParameterValidationUtils.validateLongParameter(-1L));
+    }
+}