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/*
* ============LICENSE_START=======================================================
* PNF-REGISTRATION-HANDLER
* ================================================================================
* Copyright (C) 2018 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.pnfsimulator.simulator;
import com.google.gson.Gson;
import com.google.gson.JsonElement;
import com.google.gson.stream.JsonReader;
import com.google.gson.stream.JsonToken;
import com.google.gson.stream.JsonWriter;
import java.io.IOException;
import java.io.StringReader;
import java.io.StringWriter;
import org.springframework.stereotype.Component;
@Component
public class KeywordsHandler {
private KeywordsExtractor keywordsExtractor;
private IncrementProvider incrementProvider;
public KeywordsHandler(KeywordsExtractor keywordsExtractor, IncrementProvider incrementProvider) {
this.keywordsExtractor = keywordsExtractor;
this.incrementProvider = incrementProvider;
}
public JsonElement substituteKeywords(JsonElement jsonBody, String jobId) {
int counter = incrementProvider.getAndIncrement(jobId);
try (
JsonReader reader = new JsonReader(new StringReader(jsonBody.toString()));
StringWriter stringWriter = new StringWriter();
JsonWriter jsonWriter = new JsonWriter(stringWriter);
) {
modify(reader, jsonWriter, counter);
return new Gson().fromJson(stringWriter.getBuffer().toString(), JsonElement.class);
} catch (IOException e) {
throw new KeywordsHandlerException(e);
}
}
private void modify(JsonReader reader, JsonWriter writer, int incrementValue) throws IOException {
JsonTokenProcessor jsonTokenProcessor;
do {
JsonToken token = reader.peek();
jsonTokenProcessor = JsonTokenProcessor.getProcessorFor(token);
jsonTokenProcessor.process(reader, writer, incrementValue, keywordsExtractor);
} while (isJsonProcessingFinished(jsonTokenProcessor));
}
private boolean isJsonProcessingFinished(JsonTokenProcessor jsonTokenProcessor) {
return !jsonTokenProcessor.isProcessorFor(JsonToken.END_DOCUMENT);
}
}
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