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Diffstat (limited to 'common-parameters/src/main/java/org/onap/policy/common/parameters/GroupValidationResult.java')
| -rw-r--r-- | common-parameters/src/main/java/org/onap/policy/common/parameters/GroupValidationResult.java | 324 |
1 files changed, 324 insertions, 0 deletions
diff --git a/common-parameters/src/main/java/org/onap/policy/common/parameters/GroupValidationResult.java b/common-parameters/src/main/java/org/onap/policy/common/parameters/GroupValidationResult.java new file mode 100644 index 00000000..91c3d145 --- /dev/null +++ b/common-parameters/src/main/java/org/onap/policy/common/parameters/GroupValidationResult.java @@ -0,0 +1,324 @@ +/*- + * ============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; +import java.util.Collection; +import java.util.LinkedHashMap; +import java.util.Map; +import java.util.Map.Entry; + +/** + * This class holds the result of the validation of a parameter group. + */ +public class GroupValidationResult implements ValidationResult { + // The parameter group which the validation result applies + private final ParameterGroup parameterGroup; + + // Validation status for the entire parameter class + private ValidationStatus status = ValidationStatus.CLEAN; + private String message = ParameterConstants.PARAMETER_GROUP_HAS_STATUS_MESSAGE + status.toString(); + + // Validation results for each parameter in the group + private final Map<String, ValidationResult> validationResultMap = new LinkedHashMap<>(); + + /** + * Constructor, create the field validation result with default arguments. + * + * @param parameterGroup the parameter group being validated + */ + public GroupValidationResult(final ParameterGroup parameterGroup) { + this.parameterGroup = parameterGroup; + + // Add a validation result per field + for (Field field : parameterGroup.getClass().getDeclaredFields()) { + // Exclude system fields + if (field.getName().startsWith("$") || field.getName().startsWith("_")) { + continue; + } + + // Make the field accessible + boolean savedAccessibilityValue = field.isAccessible(); + field.setAccessible(true); + + try { + // Set the validation result + validationResultMap.put(field.getName(), getValidationResult(field, parameterGroup)); + } catch (IllegalArgumentException | IllegalAccessException e) { + throw new ParameterRuntimeException("could not get value of parameter \"" + field.getName() + "\"", e); + } finally { + field.setAccessible(savedAccessibilityValue); + } + } + } + + /** + * Construct a validation result for a field + * + * @param field The parameter field + * @param ParameterGroup The parameter group containing the field + * @return the validation result + * @throws IllegalAccessException on accessing private fields + */ + private ValidationResult getValidationResult(final Field field, final ParameterGroup parameterGroup) + throws IllegalAccessException { + final String fieldName = field.getName(); + final Class<?> fieldType = field.getType(); + final Object fieldObject = field.get(parameterGroup); + + // Nested parameter groups are allowed + if (ParameterGroup.class.isAssignableFrom(fieldType)) { + return new GroupValidationResult((ParameterGroup) field.get(parameterGroup)); + } + + // Nested maps of parameter groups are allowed + if (Map.class.isAssignableFrom(field.getType())) { + checkMapIsParameterGroupMap(fieldName, fieldObject); + return new GroupMapValidationResult(field, fieldObject); + } + + // Collections of parameter groups are not allowed + if (Collection.class.isAssignableFrom(field.getType())) { + checkCollection4ParameterGroups(fieldName, fieldObject); + return new ParameterValidationResult(field, fieldObject); + } + + // It's a regular parameter + return new ParameterValidationResult(field, fieldObject); + } + + /** + * Check if this field is a map of parameter groups indexed by string keys. + * + * @param fieldName the name of the collection field. + * @param mapObject the map object to check + */ + private void checkMapIsParameterGroupMap(String fieldName, Object mapObject) { + if (mapObject == null) { + throw new ParameterRuntimeException("map parameter \"" + fieldName + "\" is null"); + } + + Map<?, ?> incomingMap = (Map<?, ?>) mapObject; + + for (Entry<?, ?> mapEntry : incomingMap.entrySet()) { + // Check the key is a string + if (!String.class.isAssignableFrom(mapEntry.getKey().getClass())) { + throw new ParameterRuntimeException("map entry is not a parameter group keyed by a string, key \"" + + mapEntry.getKey() + "\" in map \"" + fieldName + "\" is not a string"); + } + + // Check the value is a parameter group + if (!ParameterGroup.class.isAssignableFrom(mapEntry.getValue().getClass())) { + throw new ParameterRuntimeException("map entry is not a parameter group keyed by a string, value \"" + + mapEntry.getValue() + "\" in map \"" + fieldName + "\" is not a parameter group"); + } + } + } + + /** + * Check if this field contains parameter groups. + * + * @param fieldName the name of the collection field. + * @param collectionObject the collection object to check + */ + private void checkCollection4ParameterGroups(final String fieldName, final Object collectionObject) { + if (collectionObject == null) { + throw new ParameterRuntimeException("collection parameter \"" + fieldName + "\" is null"); + } + + Collection<?> collection2Check = (Collection<?>) collectionObject; + + for (Object collectionMember : collection2Check) { + if (ParameterGroup.class.isAssignableFrom(collectionMember.getClass())) { + throw new ParameterRuntimeException("collection parameter \"" + fieldName + "\" is illegal," + + " parameter groups are not allowed as collection members"); + } + } + } + + /** + * Gets the parameter group for this validation result. + * + * @return the parameter class + */ + public ParameterGroup getParameterGroup() { + return parameterGroup; + } + + /** + * Gets the name of the parameter group being validated. + * + * @return the name + */ + @Override + public String getName() { + return parameterGroup.getName(); + } + + /** + * Gets the status of validation. + * + * @return the status + */ + @Override + public ValidationStatus getStatus() { + return status; + } + + /** + * Set the validation result on on a parameter group. + * + * @param status The validation status the parameter group is receiving + * @param message The validation message explaining the validation status + */ + @Override + public void setResult(ValidationStatus status, String message) { + setResult(status); + this.message = message; + } + + /** + * Set the validation result on on a parameter group. + * + * On a sequence of calls, the most serious validation status is recorded, assuming the status enum ordinal increase + * in order of severity + * + * @param status The validation status the parameter group is receiving + */ + public void setResult(final ValidationStatus status) { + // + if (this.status.ordinal() < status.ordinal()) { + this.status = status; + this.message = ParameterConstants.PARAMETER_GROUP_HAS_STATUS_MESSAGE + status.toString(); + } + } + + /** + * Set the validation result on a parameter group. + * + * @param parameterGroupName The name of the parameter group + * @param status The validation status the field is receiving + * @param message The validation message explaining the validation status + */ + public void setResult(final String parameterGroupName, final ValidationStatus status, final String message) { + ParameterValidationResult parameterValidationResult; + try { + parameterValidationResult = (ParameterValidationResult) validationResultMap.get(parameterGroupName); + } catch (ClassCastException e) { + throw new ParameterRuntimeException("parameter not a regular parameter: " + parameterGroupName, e); + } + + if (parameterValidationResult == null) { + throw new ParameterRuntimeException( + "no regular parameter field exists for parameter: " + parameterGroupName); + } + + // Set the status of the parameter group and the field + parameterValidationResult.setResult(status, message); + this.setResult(status); + } + + /** + * Set the validation result on a nested parameter group. + * + * @param parameterName The name of the parameter field + * @param nestedValidationResult The validation result from a nested field + */ + public void setResult(String parameterName, ValidationResult nestedValidationResult) { + GroupValidationResult groupValidationResult; + try { + groupValidationResult = (GroupValidationResult) validationResultMap.get(parameterName); + } catch (ClassCastException e) { + throw new ParameterRuntimeException("parameter is not a nested group parameter: " + parameterName, e); + } + + if (groupValidationResult == null) { + throw new ParameterRuntimeException("no nested parameter field exists for parameter: " + parameterName); + } + + // Set the status of the parameter group and replace the field result + validationResultMap.put(parameterName, nestedValidationResult); + this.setResult(status); + } + + /** + * Set the validation result on a nested parameter group map entry. + * + * @param parameterName The name of the parameter field + * @param key The key of the map entry + * @param nestedMapValidationResult The validation result from a nested map entry + */ + public void setResult(final String parameterName, final String key, + final ValidationResult nestedMapValidationResult) { + GroupMapValidationResult groupMapValidationResult; + try { + groupMapValidationResult = (GroupMapValidationResult) validationResultMap.get(parameterName); + } catch (ClassCastException e) { + throw new ParameterRuntimeException("parameter is not a nested group map parameter: " + parameterName, e); + } + + if (groupMapValidationResult == null) { + throw new ParameterRuntimeException("no group map parameter field exists for parameter: " + parameterName); + } + + // Set the status of the parameter group and the field + groupMapValidationResult.setResult(key, nestedMapValidationResult); + this.setResult(status); + } + + /** + * Gets the validation result. + * + * @param initialIndentation the indentation to use on the main result output + * @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("parameter group \""); + validationResultBuilder.append(parameterGroup.getName()); + validationResultBuilder.append("\" type \""); + validationResultBuilder.append(parameterGroup.getClass().getCanonicalName()); + validationResultBuilder.append("\" "); + validationResultBuilder.append(status); + validationResultBuilder.append(", "); + validationResultBuilder.append(message); + validationResultBuilder.append('\n'); + + for (ValidationResult fieldResult : validationResultMap.values()) { + String fieldResultMessage = fieldResult.getResult(initialIndentation + subIndentation, subIndentation, + showClean); + if (fieldResultMessage != null) { + validationResultBuilder.append(fieldResultMessage); + } + } + + return validationResultBuilder.toString(); + } +}
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