Java Code Examples for com.fasterxml.jackson.core.JsonParser#getTextCharacters()

/** Parsers an int32 value out of the input. */
public static int parseInt32(JsonParser parser) throws IOException {
  JsonToken token = parser.currentToken();
  if (token == JsonToken.VALUE_NUMBER_INT) {
    // Use optimized code path for integral primitives, the normal case.
    return parser.getIntValue();
  }
  // JSON doesn't distinguish between integer values and floating point values so "1" and
  // "1.000" are treated as equal in JSON. For this reason we accept floating point values for
  // integer fields as well as long as it actually is an integer (i.e., round(value) == value).
  try {
    BigDecimal value =
        new BigDecimal(
            parser.getTextCharacters(), parser.getTextOffset(), parser.getTextLength());
    return value.intValueExact();
  } catch (Exception e) {
    throw new InvalidProtocolBufferException("Not an int32 value: " + parser.getText());
  }
}
 

/** Parsers a double value out of the input. */
public static double parseDouble(JsonParser parser) throws IOException {
  JsonToken current = parser.currentToken();
  if (!current.isNumeric()) {
    String json = parser.getText();
    if (json.equals("NaN")) {
      return Double.NaN;
    } else if (json.equals("Infinity")) {
      return Double.POSITIVE_INFINITY;
    } else if (json.equals("-Infinity")) {
      return Double.NEGATIVE_INFINITY;
    }
  }
  try {
    // We don't use Double.parseDouble() here because that function simply
    // accepts all values. Here we readValue the value into a BigDecimal and do
    // explicit range check on it.
    BigDecimal value =
        new BigDecimal(
            parser.getTextCharacters(), parser.getTextOffset(), parser.getTextLength());
    if (value.compareTo(MAX_DOUBLE) > 0 || value.compareTo(MIN_DOUBLE) < 0) {
      throw new InvalidProtocolBufferException("Out of range double value: " + parser.getText());
    }
    return value.doubleValue();
  } catch (NumberFormatException e) {
    throw new InvalidProtocolBufferException("Not an double value: " + parser.getText());
  }
}
 

@Override
public T deserialize(JsonParser p, DeserializationContext ctxt)
        throws IOException {
    Intermediate intermediate = createIntermediate();

    if (p.isExpectedStartArrayToken()) {
        JsonToken t;
        while ((t = p.nextToken()) != JsonToken.END_ARRAY) {
            String str;
            if (t == JsonToken.VALUE_STRING) {
                str = p.getText();
            } else {
                CharSequence cs =
                        (CharSequence) ctxt.handleUnexpectedToken(getValueType(ctxt), p);
                str = cs.toString();
            }
            if (str.length() != 1) {
                ctxt.reportInputMismatch(this,
                        "Cannot convert a JSON String of length %d into a char element of " +
                                "char array",
                        str.length());
            }
            add(intermediate, str.charAt(0));
        }
        return finish(intermediate);
    }

    char[] chars = p.getTextCharacters();
    addAll(intermediate, chars, p.getTextOffset(), p.getTextLength());
    return finish(intermediate);
}
 

private static void assertJsonParserText(final JsonParser parser,
                                         final String expectedText) throws IOException {
    assertEquals(expectedText, parser.getText());
    final char[] buffer = parser.getTextCharacters();
    assertNotNull(buffer);
    assertEquals(expectedText, new String(buffer, parser.getTextOffset(), parser.getTextLength()));
}
 

@Override
public T deserialize(JsonParser p, DeserializationContext ctxt)
        throws IOException {
    Intermediate intermediate = createIntermediate();

    if (p.isExpectedStartArrayToken()) {
        JsonToken t;
        while ((t = p.nextToken()) != JsonToken.END_ARRAY) {
            String str;
            if (t == JsonToken.VALUE_STRING) {
                str = p.getText();
            } else {
                CharSequence cs = (CharSequence) ctxt.handleUnexpectedToken(getValueType(ctxt), p);
                str = cs.toString();
            }
            if (str.length() != 1) {
                ctxt.reportInputMismatch(this,
                                         "Cannot convert a JSON String of length %d into a char element of " +
                                         "char array",
                                         str.length());
            }
            intermediate.add(str.charAt(0));
        }
        return finish(intermediate);
    }

    char[] chars = p.getTextCharacters();
    if (p.getTextOffset() == 0 && p.getTextLength() == chars.length) {
        intermediate.addAll(chars);
    } else {
        int i = 0;
        // first, copy in batches of BATCH_COPY_SIZE
        if ((p.getTextLength() - i) >= BATCH_COPY_SIZE) {
            char[] buf = new char[BATCH_COPY_SIZE];
            do {
                System.arraycopy(chars, p.getTextOffset() + i, buf, 0, BATCH_COPY_SIZE);
                intermediate.addAll(buf);
                i += BATCH_COPY_SIZE;
            } while ((p.getTextLength() - i) >= BATCH_COPY_SIZE);
        }
        // and finally, copy the remainder.
        if (p.getTextLength() > i) {
            char[] tail = Arrays.copyOfRange(
                    chars, p.getTextOffset() + i, p.getTextOffset() + p.getTextLength());
            intermediate.addAll(tail);
        }
    }
    return finish(intermediate);
}