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/*
* ============LICENSE_START=======================================================
* DCAEGEN2-SERVICES-SDK
* ================================================================================
* Copyright (C) 2020 Nokia. 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.onap.dcaegen2.services.sdk.services.external.schema.manager.service;
import org.onap.dcaegen2.services.sdk.services.external.schema.manager.model.SchemaReference;
public class SchemaReferenceResolver {
private static final String ROOT_REFERENCE = "/";
private static final int URL_INDEX = 0;
private static final int INTERNAL_REFERENCE_INDEX = 1;
private static final int REFERENCE_FRAGMENTS_CONTAINING_INTERNAL_REF_SIZE = 2;
private final String schemaReference;
public SchemaReferenceResolver(String schemaReference) {
this.schemaReference = schemaReference;
}
/**
* Extracts the schema reference fragment, provided in the event, corresponding to the url path (before #).
*
* @return url path
*/
public String resolveUrl() {
String[] referenceFragments = schemaReference.split(SchemaReference.URL_SEPARATOR);
return referenceFragments[URL_INDEX];
}
/**
* Returns internal reference (after #) if it is present in schema reference and add "/" on the beginning if it's
* not present, otherwise returns "/".
*
* @return resolved internal reference
*/
public String resolveInternalReference() {
String reference;
String[] referenceFragments = schemaReference.split(SchemaReference.URL_SEPARATOR);
if (internalReferenceExists(referenceFragments)) {
String internalReference = referenceFragments[INTERNAL_REFERENCE_INDEX];
reference = prepareExistingInternalReference(internalReference);
} else {
reference = ROOT_REFERENCE;
}
return reference;
}
private boolean internalReferenceExists(String[] referenceFragments) {
return referenceFragments.length == REFERENCE_FRAGMENTS_CONTAINING_INTERNAL_REF_SIZE;
}
private String prepareExistingInternalReference(String internalReference) {
return (!isAbsolute(internalReference)) ? ROOT_REFERENCE + internalReference : internalReference;
}
private boolean isAbsolute(String internalReference) {
return internalReference.startsWith(ROOT_REFERENCE);
}
}
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