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/*
* ============LICENSE_START=======================================================
* Copyright (C) 2021 Nordix Foundation
* Modifications Copyright (C) 2021 Bell Canada. 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.cps.spi.query;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import lombok.AccessLevel;
import lombok.Getter;
import lombok.Setter;
import org.onap.cps.spi.exceptions.CpsPathException;
@Getter
@Setter(AccessLevel.PRIVATE)
public class CpsPathQuery {
private String xpathPrefix;
private String leafName;
private Object leafValue;
public static final Pattern QUERY_CPS_PATH_WITH_SINGLE_LEAF_PATTERN =
Pattern.compile("(.*)\\[\\s*@(.*?)\\s*=\\s*(.*?)\\s*]");
public static final Pattern LEAF_STRING_VALUE_PATTERN = Pattern.compile("['\"](.*)['\"]");
public static final Pattern LEAF_INTEGER_VALUE_PATTERN = Pattern.compile("[-+]?\\d+");
/**
* Returns a xpath prefix, leaf name and leaf value for the given cps path.
*
* @param cpsPath cps path
* @return a CpsPath object containing the xpath prefix, leaf name and leaf value.
*/
public static CpsPathQuery createFrom(final String cpsPath) {
final Matcher matcher = QUERY_CPS_PATH_WITH_SINGLE_LEAF_PATTERN.matcher(cpsPath);
if (matcher.matches()) {
final CpsPathQuery cpsPathQuery = new CpsPathQuery();
cpsPathQuery.setXpathPrefix(matcher.group(1));
cpsPathQuery.setLeafName(matcher.group(2));
cpsPathQuery.setLeafValue(convertLeafValueToCorrectType(matcher.group(3)));
return cpsPathQuery;
}
throw new CpsPathException("Invalid cps path.",
String.format("Cannot interpret or parse cps path %s.", cpsPath));
}
private static Object convertLeafValueToCorrectType(final String leafValueString) {
final Matcher stringValueWithQuotesMatcher = LEAF_STRING_VALUE_PATTERN.matcher(leafValueString);
if (stringValueWithQuotesMatcher.matches()) {
return stringValueWithQuotesMatcher.group(1);
}
final Matcher integerValueMatcher = LEAF_INTEGER_VALUE_PATTERN.matcher(leafValueString);
if (integerValueMatcher.matches()) {
return Integer.valueOf(leafValueString);
}
throw new CpsPathException("Unsupported leaf value.",
String.format("Unsupported leaf value %s in cps path.", leafValueString));
}
}
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