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/*
* ============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 final ScalarUnitValidator scalarUnitValidator = new ScalarUnitValidator();
/**
* Tosca Scalar Unit Types structure.
*
* At least positive integers, no single white space, 1 to 3 chars
*/
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())));
}
}
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