Improve validation, add hierarchical validation

Parameter validaiton updated to generically support nested groups of
parameters, and nested maps of parameters.

Unit test showing JSON parameter input added.
Unit test showing YAML parameter inout added.

Test parameter group classes moved into subdirectory

This allows parameters to be unmarshaled seamlessly from JSON and YAML
files.

Change-Id: I768e11f31ee7f62299c4d5d95ab68a005d1aff16
Issue-ID: POLICY-922
Signed-off-by: liamfallon <liam.fallon@ericsson.com>

1 files changed, 110 insertions, 0 deletions

diff --git a/common-parameters/src/main/java/org/onap/policy/common/parameters/ParameterValidationResult.java b/common-parameters/src/main/java/org/onap/policy/common/parameters/ParameterValidationResult.java
new file mode 100644
index 00000000..9c829f4b
--- /dev/null
+++ b/common-parameters/src/main/java/org/onap/policy/common/parameters/ParameterValidationResult.java
@@ -0,0 +1,110 @@
+/*-
+ * ============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.parameters;
+
+import java.lang.reflect.Field;
+
+/**
+ * This class holds the result of the validation of a parameter.
+ */
+public class ParameterValidationResult implements ValidationResult {
+    // The field and value of the parameter to which the validation result applies
+    private final Field field;
+    private final Object parameterValue;
+
+    // Validation status and message
+    private ValidationStatus status = ValidationStatus.CLEAN;
+    private String message = ParameterConstants.PARAMETER_HAS_STATUS_MESSAGE + status.toString();
+
+    /**
+     * Constructor, create validation result for a parameter with default arguments.
+     *
+     * @param field the parameter field
+     * @param parameterValue the value of the parameter field
+     */
+    protected ParameterValidationResult(final Field field, final Object parameterValue) {
+        this.field = field;
+        this.parameterValue = parameterValue;
+    }
+
+    /**
+     * Gets the name of the parameter being validated.
+     *
+     * @return the name
+     */
+    @Override
+    public String getName() {
+        return field.getName();
+    }
+
+    /**
+     * Gets the validation status.
+     *
+     * @return the validation status
+     */
+    @Override
+    public ValidationStatus getStatus() {
+        return status;
+    }
+
+    /**
+     * Set the validation result on on a parameter field. 
+     * @param status The validation status the field is receiving
+     * @param message The validation message explaining the validation status
+     */
+    @Override
+    public void setResult(final ValidationStatus status, final String message) {
+        this.status = status;
+        this.message = message;
+    }
+
+    /**
+     * Gets the validation result.
+     *
+     * @param initialIndentation the result indentation
+     * @param subIndentation the indentation to use on sub parts of the result output
+     * @param showClean output information on clean fields
+     * @return the result
+     */
+    @Override
+    public String getResult(final String initialIndentation, final String subIndentation, final boolean showClean) {
+        if (status == ValidationStatus.CLEAN && !showClean) {
+            return null;
+        }
+
+        StringBuilder validationResultBuilder = new StringBuilder();
+
+        validationResultBuilder.append(initialIndentation);
+        validationResultBuilder.append("field \"");
+        validationResultBuilder.append(getName());
+        validationResultBuilder.append("\" type \"");
+        validationResultBuilder.append(field.getType().getCanonicalName());
+        validationResultBuilder.append("\" value \"");
+        validationResultBuilder.append(parameterValue);
+        validationResultBuilder.append("\" ");
+        validationResultBuilder.append(getStatus());
+        validationResultBuilder.append(", ");
+        validationResultBuilder.append(message);
+        validationResultBuilder.append('\n');
+
+        return validationResultBuilder.toString();
+    }
+}