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Helper methods to create document model consisting of JSONArrays and JSONObjects using a JsonPullParser
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import java.io.IOException; | |
import java.io.InputStream; | |
import java.io.InputStreamReader; | |
import java.io.Reader; | |
import org.json.JSONArray; | |
import org.json.JSONException; | |
import org.json.JSONObject; | |
import net.markenwerk.utils.json.parser.JsonPullParser; | |
import net.markenwerk.utils.json.parser.JsonSourcePullParser; | |
import net.markenwerk.utils.json.parser.JsonState; | |
import net.markenwerk.utils.json.parser.JsonSyntaxException; | |
public final class JsonUtil { | |
private JsonUtil() { | |
} | |
public static JSONObject readObject(Reader reader) throws JsonSyntaxException, IOException, | |
IllegalArgumentException, JSONException { | |
if (null == reader) { | |
throw new IllegalArgumentException("reader is null"); | |
} else { | |
final JsonPullParser jsonParser = new JsonSourcePullParser(reader); | |
try { | |
jsonParser.beginDocumnet(); | |
JSONObject jsonObject = readObject(jsonParser); | |
jsonParser.endDocumnet(); | |
return jsonObject; | |
} finally { | |
jsonParser.close(); | |
} | |
} | |
} | |
private static JSONObject readObject(JsonPullParser jsonParser) throws JsonSyntaxException, IOException, | |
IllegalArgumentException, JSONException { | |
final JSONObject jsonObject = new JSONObject(); | |
jsonParser.beginObject(); | |
while (jsonParser.hasNext()) { | |
String name = jsonParser.nextName(); | |
JsonState token = jsonParser.currentState(); | |
switch (token) { | |
case ARRAY_BEGIN: | |
jsonObject.put(name, readArray(jsonParser)); | |
break; | |
case OBJECT_BEGIN: | |
jsonObject.put(name, readObject(jsonParser)); | |
break; | |
case BOOLEAN: | |
jsonObject.put(name, jsonParser.nextBoolean()); | |
break; | |
case NULL: | |
jsonParser.nextNull(); | |
jsonObject.put(name, JSONObject.NULL); | |
break; | |
case LONG: | |
jsonObject.put(name, jsonParser.nextLong()); | |
break; | |
case DOUBLE: | |
jsonObject.put(name, jsonParser.nextDouble()); | |
break; | |
case STRING: | |
jsonObject.put(name, jsonParser.nextString()); | |
break; | |
default: | |
throw new RuntimeException("unexpected token " + token); | |
} | |
} | |
jsonParser.endObject(); | |
return jsonObject; | |
} | |
public static JSONArray readArray(Reader reader) throws JsonSyntaxException, IOException, | |
IllegalArgumentException, IllegalStateException, JSONException { | |
if (null == reader) { | |
throw new IllegalArgumentException("reader is null"); | |
} else { | |
JsonPullParser jsonParser = new JsonSourcePullParser(reader); | |
try { | |
jsonParser.beginDocumnet(); | |
JSONArray jsonArray = readArray(jsonParser); | |
jsonParser.endDocumnet(); | |
return jsonArray; | |
} finally { | |
jsonParser.close(); | |
} | |
} | |
} | |
private static JSONArray readArray(JsonPullParser jsonParser) throws JsonSyntaxException, IOException, | |
IllegalArgumentException, IllegalStateException, JSONException { | |
final JSONArray jsonArray = new JSONArray(); | |
jsonParser.beginArray(); | |
while (jsonParser.hasNext()) { | |
JsonState token = jsonParser.currentState(); | |
switch (token) { | |
case ARRAY_BEGIN: | |
jsonArray.put(readArray(jsonParser)); | |
break; | |
case OBJECT_BEGIN: | |
jsonArray.put(readObject(jsonParser)); | |
break; | |
case BOOLEAN: | |
jsonArray.put(jsonParser.nextBoolean()); | |
break; | |
case NULL: | |
jsonParser.nextNull(); | |
jsonArray.put((Object) null); | |
break; | |
case LONG: | |
jsonArray.put(jsonParser.nextLong()); | |
break; | |
case DOUBLE: | |
jsonArray.put(jsonParser.nextDouble()); | |
break; | |
case STRING: | |
jsonArray.put(jsonParser.nextString()); | |
break; | |
default: | |
throw new RuntimeException("unexpected token " + token); | |
} | |
} | |
jsonParser.endArray(); | |
return jsonArray; | |
} | |
} |
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