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package eu.dnetlib.pace.model;
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import java.lang.reflect.Type;
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import com.google.gson.GsonBuilder;
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import com.google.gson.InstanceCreator;
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import com.google.gson.JsonDeserializationContext;
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import com.google.gson.JsonDeserializer;
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import com.google.gson.JsonElement;
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import com.google.gson.JsonObject;
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import com.google.gson.JsonParseException;
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/**
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* The Class MapDocumentSerializer.
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*/
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public class MapDocumentSerializer implements InstanceCreator<MapDocument> {
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@Override
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public MapDocument createInstance(final Type type) {
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return new MapDocument();
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}
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/**
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* Decode.
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*
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* @param s
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* the String
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* @return the map document
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*/
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public static MapDocument decode(final String s) {
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final GsonBuilder gson = new GsonBuilder();
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gson.registerTypeAdapter(Field.class, new JsonDeserializer<Field>() {
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@Override
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public Field deserialize(final JsonElement json, final Type typeOfT, final JsonDeserializationContext context) throws JsonParseException {
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final FieldListImpl fl = new FieldListImpl();
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if (json.isJsonObject()) {
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fl.add(handleJsonObject(json.getAsJsonObject()));
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} else if (json.isJsonArray()) {
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for (final JsonElement e : json.getAsJsonArray()) {
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if (e.isJsonObject()) {
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fl.add(handleJsonObject(e.getAsJsonObject()));
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}
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}
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}
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return fl;
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}
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private Field handleJsonObject(final JsonObject o) {
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final FieldListImpl fl = new FieldListImpl();
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final String name = o.get("name").getAsString();
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final String type = o.get("type").getAsString();
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final String value = o.get("value").getAsString();
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fl.add(new FieldValueImpl(eu.dnetlib.pace.config.Type.valueOf(type), name, value));
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return fl;
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}
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});
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return gson.create().fromJson(s, MapDocument.class);
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}
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/**
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* Decode.
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*
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* @param bytes
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* the bytes
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* @return the map document
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*/
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public static MapDocument decode(final byte[] bytes) {
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return decode(new String(bytes));
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}
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/**
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* To string.
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*
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* @param doc
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* the doc
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* @return the string
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*/
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public static String toString(final MapDocument doc) {
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final GsonBuilder b = new GsonBuilder();
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return b.setPrettyPrinting().create().toJson(doc);
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}
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/**
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* To byte array.
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*
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* @param doc
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* the doc
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* @return the byte[]
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*/
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public static byte[] toByteArray(final MapDocument doc) {
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return toString(doc).getBytes();
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}
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}
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