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/*-
* ============LICENSE_START=======================================================
* SDC
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. 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.
* ============LICENSE_END=========================================================
*/
package org.openecomp.sdc.be.model.tosca.constraints;
import java.beans.IntrospectionException;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.lang.reflect.InvocationTargetException;
import org.openecomp.sdc.be.model.tosca.ToscaType;
import org.openecomp.sdc.be.model.tosca.constraints.exception.ConstraintValueDoNotMatchPropertyTypeException;
/**
* Utility class to validate constraints types.
*/
public final class ConstraintUtil {
private ConstraintUtil() {
}
/**
* Validates that the {@link ToscaType} specified is a
* {@link ToscaType#STRING}.
*
* @param propertyType
* The property tosca type.
* @throws ConstraintValueDoNotMatchPropertyTypeException
* In case the type is not {@link ToscaType#STRING}.
*/
public static void checkStringType(ToscaType propertyType) throws ConstraintValueDoNotMatchPropertyTypeException {
if (!ToscaType.STRING.equals(propertyType)) {
throw new ConstraintValueDoNotMatchPropertyTypeException(
"Invalid property type <" + propertyType.toString() + ">");
}
}
/**
* Verify that the given tosca type is supported for comparison
*
* @param propertyType
* the tosca type to check
* @throws ConstraintValueDoNotMatchPropertyTypeException
* if the property type cannot be compared
*/
public static void checkComparableType(ToscaType propertyType)
throws ConstraintValueDoNotMatchPropertyTypeException {
// The validity of the value is already assured by us with our
// ToscaType.convert() method
// here we just want to check that the constraint is not used on
// unsupported type as boolean
switch (propertyType) {
case FLOAT:
case INTEGER:
case TIMESTAMP:
case VERSION:
break;
case STRING:
case BOOLEAN:
throw new ConstraintValueDoNotMatchPropertyTypeException(
"Constraint is invalid for property type <" + propertyType.toString() + ">");
default:
throw new ConstraintValueDoNotMatchPropertyTypeException(
"Invalid property type <" + propertyType.toString() + ">");
}
}
/**
* Convert a string value following its type throw exception if it cannot be
* converted to a comparable
*
* @param propertyType
* the type of the property
* @param value
* the value to convert
* @return the converted comparable
* @throws ConstraintValueDoNotMatchPropertyTypeException
* if the converted value is not a comparable
*/
@SuppressWarnings("rawtypes")
public static Comparable convertToComparable(ToscaType propertyType, String value)
throws ConstraintValueDoNotMatchPropertyTypeException {
Object comparableObj = propertyType.convert(value);
if (!(comparableObj instanceof Comparable)) {
throw new IllegalArgumentException(
"Try to convert a value of a type which is not comparable [" + propertyType + "] to Comparable");
} else {
return (Comparable) comparableObj;
}
}
public static class ConstraintInformation {
public ConstraintInformation(String name, Object reference, String value, String type) {
this.name = name;
this.reference = reference;
this.value = value;
this.type = type;
}
private String name;
private Object reference;
private String value;
private String type;
}
public static ConstraintInformation getConstraintInformation(Object constraint) throws IntrospectionException {
PropertyDescriptor[] propertyDescriptors = Introspector.getBeanInfo(constraint.getClass())
.getPropertyDescriptors();
PropertyDescriptor firstDescriptor = null;
for (PropertyDescriptor propertyDescriptor : propertyDescriptors) {
if (propertyDescriptor.getReadMethod() != null && propertyDescriptor.getWriteMethod() != null) {
firstDescriptor = propertyDescriptor;
break;
}
}
if (firstDescriptor == null) {
throw new IntrospectionException("Cannot find constraint name");
}
try {
return new ConstraintInformation(firstDescriptor.getName(),
firstDescriptor.getReadMethod().invoke(constraint), null, null);
} catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e) {
throw new IntrospectionException("Cannot retrieve constraint reference " + e.getMessage());
}
}
}
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