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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.stream.JsonReader;
import com.google.gson.stream.JsonToken;
import com.google.gson.stream.JsonWriter;
import java.io.IOException;
import java.math.BigDecimal;
import java.util.Arrays;
import java.util.stream.Collectors;
public enum JsonTokenProcessor {
STRING(JsonToken.STRING) {
@Override
void process(JsonReader reader, JsonWriter writer, int incrementValue, KeywordsExtractor keywordsExtractor)
throws IOException {
String originalString = reader.nextString();
if (keywordsExtractor.isPrimitive(originalString)) {
writer.value(keywordsExtractor.substitutePrimitiveKeyword(originalString));
} else {
String possibleSubstitution = Arrays.stream(originalString.split(" "))
.map(singleWord -> keywordsExtractor.substituteStringKeyword(singleWord, incrementValue)).collect(
Collectors.joining(" "));
writer.value(originalString.equals(possibleSubstitution) ? originalString : possibleSubstitution);
}
}
},
BEGIN_ARRAY(JsonToken.BEGIN_ARRAY) {
@Override
void process(JsonReader reader, JsonWriter writer, int incrementValue, KeywordsExtractor keywordsExtractor)
throws IOException {
reader.beginArray();
writer.beginArray();
}
},
END_ARRAY(JsonToken.END_ARRAY) {
@Override
void process(JsonReader reader, JsonWriter writer, int incrementValue, KeywordsExtractor keywordsExtractor)
throws IOException {
reader.endArray();
writer.endArray();
}
},
BEGIN_OBJECT(JsonToken.BEGIN_OBJECT) {
@Override
void process(JsonReader reader, JsonWriter writer, int incrementValue, KeywordsExtractor keywordsExtractor)
throws IOException {
reader.beginObject();
writer.beginObject();
}
},
END_OBJECT(JsonToken.END_OBJECT) {
@Override
void process(JsonReader reader, JsonWriter writer, int incrementValue, KeywordsExtractor keywordsExtractor)
throws IOException {
reader.endObject();
writer.endObject();
}
},
NAME(JsonToken.NAME) {
@Override
void process(JsonReader reader, JsonWriter writer, int incrementValue, KeywordsExtractor keywordsExtractor)
throws IOException {
writer.name(reader.nextName());
}
},
NUMBER(JsonToken.NUMBER) {
@Override
void process(JsonReader reader, JsonWriter writer, int incrementValue, KeywordsExtractor keywordsExtractor)
throws IOException {
writer.value(new BigDecimal(reader.nextString()));
}
},
BOOLEAN(JsonToken.BOOLEAN) {
@Override
void process(JsonReader reader, JsonWriter writer, int incrementValue, KeywordsExtractor keywordsExtractor)
throws IOException {
writer.value(reader.nextBoolean());
}
},
NULL(JsonToken.NULL) {
@Override
void process(JsonReader reader, JsonWriter writer, int incrementValue, KeywordsExtractor keywordsExtractor)
throws IOException {
reader.nextNull();
writer.nullValue();
}
},
END_DOCUMENT(JsonToken.END_DOCUMENT) {
@Override
void process(JsonReader reader, JsonWriter writer, int incrementValue, KeywordsExtractor keywordsExtractor)
throws IOException {
// do nothing
}
};
private JsonToken jsonToken;
JsonTokenProcessor(JsonToken jsonToken) {
this.jsonToken = jsonToken;
}
boolean isProcessorFor(JsonToken jsonToken) {
return this.jsonToken == jsonToken;
}
abstract void process(JsonReader reader, JsonWriter writer, int incrementValue, KeywordsExtractor keywordsExtractor) throws IOException;
private static final String INVALID_JSON_BODY_UNSUPPORTED_JSON_TOKEN = "Invalid json body. Unsupported JsonToken.";
static JsonTokenProcessor getProcessorFor(JsonToken jsonToken) throws IOException {
return Arrays.stream(JsonTokenProcessor.values()).filter(processor -> processor.isProcessorFor(jsonToken)).findFirst()
.orElseThrow(() -> new IOException(INVALID_JSON_BODY_UNSUPPORTED_JSON_TOKEN));
}
}
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