Java JsonToken.id方法代碼示例

import com.fasterxml.jackson.core.JsonToken; //導入方法依賴的package包/類
private JsonToken processToken(JsonToken curToken, JsonParser parser, JsonGenerator jgen)
    throws IOException {
  if (curToken.isStructEnd()) {
    // this is our escape and base case.
    return curToken;
  }
  if (curToken.isStructStart()) {
    processStructStart(curToken, jgen);
    JsonToken token = processToken(parser.nextToken(), parser, jgen);
    while (!token.isStructEnd()) {
      token = processToken(token, parser, jgen);
    }
    processStructEnd(token, jgen);
    return parser.nextToken();
  }

  if (curToken.id() == JsonTokenId.ID_FIELD_NAME) {
    String currentName = parser.getCurrentName();
    if (isFiltered && filters.containsKey(parser.getCurrentName())) {
      jgen.writeFieldName(currentName);
      // perform filtering.
      return filters.get(parser.getCurrentName()).processToken(parser.nextToken(), parser, jgen);
    } else if (!isFiltered) {
      jgen.writeFieldName(currentName);
      return processToken(parser.nextToken(), parser, jgen);
    } else {
      parser.nextToken();
      parser.skipChildren();
      return processToken(parser.nextToken(), parser, jgen);
    }
  } else if (curToken.isScalarValue()) {
    processValue(curToken, parser, jgen);
    return parser.nextToken();
  } else {
    LOGGER.error(
        "Unable to process the token {} with name {}.", curToken, parser.getCurrentName());
    throw new RuntimeException(
        "Unable to process the token " + curToken + " with name" + parser.getCurrentName());
  }
}
 

import com.fasterxml.jackson.core.JsonToken; //導入方法依賴的package包/類
/**
 * Uses a JsonToken + JsonParser to determine how to write a value to the JsonGenerator.
 *
 * <p>This separation exists so we can separate the iteration logic from the parsing logic.
 *
 * @param valueToken current token we are interested in from the parser
 * @param parser current parser
 * @param jgen JsonGenerator that is used for writing json onto an underlying stream
 * @throws JsonGenerationException if access to the JsonParser throws a JsonGenerationException
 * @throws IOException if the Jackson utilties (JsonParser or JsonGenerator) throw an IOException
 */
private void processValue(JsonToken valueToken, JsonParser parser, JsonGenerator jgen)
    throws IOException {
  if (valueToken.isBoolean()) {
    jgen.writeBoolean(parser.getBooleanValue());
  } else if (valueToken.isNumeric()) {
    if (parser.getNumberType() == JsonParser.NumberType.INT) {
      jgen.writeNumber(parser.getIntValue());
    } else if (parser.getNumberType() == JsonParser.NumberType.DOUBLE) {
      jgen.writeNumber(parser.getDoubleValue());
    } else if (parser.getNumberType() == JsonParser.NumberType.FLOAT) {
      jgen.writeNumber(parser.getFloatValue());
    } else if (parser.getNumberType() == JsonParser.NumberType.LONG) {
      jgen.writeNumber(parser.getLongValue());
    } else if (parser.getNumberType() == JsonParser.NumberType.BIG_DECIMAL) {
      jgen.writeNumber(parser.getDecimalValue());
    } else if (parser.getNumberType() == JsonParser.NumberType.BIG_INTEGER) {
      jgen.writeNumber(parser.getBigIntegerValue());
    } else {
      LOGGER.error("Found unsupported numeric value with name {}.", parser.getCurrentName());
      throw new RuntimeException(
          "Found unsupported numeric value with name " + parser.getCurrentName());
    }
  } else if (valueToken.id() == JsonTokenId.ID_STRING) {
    jgen.writeString(parser.getText());
  } else {
    // Something bad just happened. Probably an unsupported type.
    LOGGER.error(
        "Found unsupported value type {} for name {}.", valueToken.id(), parser.getCurrentName());
    throw new RuntimeException(
        "Found unsupported value type " + valueToken.id() + " for name " + parser
            .getCurrentName());
  }
}
 

import com.fasterxml.jackson.core.JsonToken; //導入方法依賴的package包/類
private void processStructStart(JsonToken token, JsonGenerator jgen) throws IOException {
  if (token.id() == JsonToken.START_OBJECT.id()) {
    jgen.writeStartObject();
  } else if (token.id() == JsonToken.START_ARRAY.id()) {
    jgen.writeStartArray();
  } else {
    LOGGER.error("Illegal struct start {}", token.id());
    throw new RuntimeException("Illegal struct start " + token.id());
  }
}
 

import com.fasterxml.jackson.core.JsonToken; //導入方法依賴的package包/類
private void processStructEnd(JsonToken token, JsonGenerator jgen)
    throws IOException {
  if (token.id() == JsonTokenId.ID_END_OBJECT) {
    jgen.writeEndObject();
  } else if (token.id() == JsonTokenId.ID_END_ARRAY) {
    jgen.writeEndArray();
  } else {
    LOGGER.error("Illegal struct end {}", token.id());
    throw new RuntimeException("Illegal struct end " + token.id());
  }
}