Android Open Source - JsonPullParser Item Map Converter

• Back to Development/json  ↑

From Project

Back to project page JsonPullParser.

License

The source code is released under:

Apache License

Java Source Code

package net.vvakame.sample.duma;
/*from w  w  w. j  a  va 2 s  .  c om*/
import java.io.IOException;
import java.io.Writer;
import java.util.HashMap;
import java.util.Map;

import net.vvakame.util.jsonpullparser.JsonFormatException;
import net.vvakame.util.jsonpullparser.JsonPullParser;
import net.vvakame.util.jsonpullparser.JsonPullParser.State;
import net.vvakame.util.jsonpullparser.util.JsonUtil;
import net.vvakame.util.jsonpullparser.util.OnJsonObjectAddListener;
import net.vvakame.util.jsonpullparser.util.TokenConverter;
import static net.vvakame.util.jsonpullparser.util.JsonUtil.*;

/**
 * {@link TokenConverter} for parsing items or something in the ReadItLater API as Map<String, Item>
 * @author vvakame
 */
public class ItemMapConverter extends TokenConverter<Map<String, Item>> {

  static ItemMapConverter conv = null;


  /**
   * Gets a new instance of ItemMapConverter
   * @return A new instance of ItemMapConverter
   * @author vvakame
   */
  public static ItemMapConverter getInstance() {
    if (conv == null) {
      conv = new ItemMapConverter();
    }
    return conv;
  }

  @Override
  public Map<String, Item> parse(JsonPullParser parser, OnJsonObjectAddListener listener)
      throws IOException, JsonFormatException {

    State state = parser.lookAhead();

    if (state == State.VALUE_NULL) {
      return null;
    }

    Map<String, Item> resultMap = new HashMap<String, Item>();

    state = parser.getEventType();
    if (state != State.START_HASH) {
      throw new JsonFormatException("expected state is START_HASH, but get=" + state);
    }

    while ((state = parser.lookAhead()) != State.END_HASH) {

      state = parser.getEventType();

      if (state != State.KEY) {
        throw new JsonFormatException("expected state is VALUE_STRING, but get=" + state);
      }
      String key = parser.getValueString();

      Item item = ItemGenerated.get(parser, listener);
      resultMap.put(key, item);

    }
    parser.getEventType();

    return resultMap;
  }

  @Override
  public void encodeNullToNull(Writer writer, Map<String, Item> obj) throws IOException {
    if (obj == null) {
      writer.write("null");
      return;
    }

    startHash(writer);

    int size = obj.size();
    int i = 0;
    for (String key : obj.keySet()) {
      Item item = obj.get(key);

      JsonUtil.putKey(writer, key);
      ItemGenerated.encode(writer, item);

      if (i + 1 < size) {
        addSeparator(writer);
      }
      i++;
    }

    endHash(writer);
  }
}

Java Source Code List

• Back to Development/json  ↑