Java NumberInput类代码示例

import com.fasterxml.jackson.core.io.NumberInput; //导入依赖的package包/类
private void _parseSlowInt(int expType) throws IOException
{
    String numStr = _textBuffer.contentsAsString();
    try {
        int len = _intLength;
        char[] buf = _textBuffer.getTextBuffer();
        int offset = _textBuffer.getTextOffset();
        if (_numberNegative) {
            ++offset;
        }
        // Some long cases still...
        if (NumberInput.inLongRange(buf, offset, len, _numberNegative)) {
            // Probably faster to construct a String, call parse, than to use BigInteger
            _numberLong = Long.parseLong(numStr);
            _numTypesValid = NR_LONG;
        } else {
            // nope, need the heavy guns... (rare case)
            _numberBigInt = new BigInteger(numStr);
            _numTypesValid = NR_BIGINT;
        }
    } catch (NumberFormatException nex) {
        // Can this ever occur? Due to overflow, maybe?
        _wrapError("Malformed numeric value '"+numStr+"'", nex);
    }
}
 

import com.fasterxml.jackson.core.io.NumberInput; //导入依赖的package包/类
/**
 * Convenience method for converting contents of the buffer
 * into a {@link BigDecimal}.
 */
public BigDecimal contentsAsDecimal() throws NumberFormatException
{
    // Already got a pre-cut array?
    if (_resultArray != null) {
        return NumberInput.parseBigDecimal(_resultArray);
    }
    // Or a shared buffer?
    if ((_inputStart >= 0) && (_inputBuffer != null)) {
        return NumberInput.parseBigDecimal(_inputBuffer, _inputStart, _inputLen);
    }
    // Or if not, just a single buffer (the usual case)
    if ((_segmentSize == 0) && (_currentSegment != null)) {
        return NumberInput.parseBigDecimal(_currentSegment, 0, _currentSize);
    }
    // If not, let's just get it aggregated...
    return NumberInput.parseBigDecimal(contentsAsArray());
}
 

import com.fasterxml.jackson.core.io.NumberInput; //导入依赖的package包/类
public void testIntParsing() throws Exception
{
    char[] testChars = "123456789".toCharArray();

    assertEquals(3, NumberInput.parseInt(testChars, 2, 1));
    assertEquals(123, NumberInput.parseInt(testChars, 0, 3));
    assertEquals(2345, NumberInput.parseInt(testChars, 1, 4));
    assertEquals(9, NumberInput.parseInt(testChars, 8, 1));
    assertEquals(456789, NumberInput.parseInt(testChars, 3, 6));
    assertEquals(23456, NumberInput.parseInt(testChars, 1, 5));
    assertEquals(123456789, NumberInput.parseInt(testChars, 0, 9));

    testChars = "32".toCharArray();
    assertEquals(32, NumberInput.parseInt(testChars, 0, 2));
    testChars = "189".toCharArray();
    assertEquals(189, NumberInput.parseInt(testChars, 0, 3));

    testChars = "10".toCharArray();
    assertEquals(10, NumberInput.parseInt(testChars, 0, 2));
    assertEquals(0, NumberInput.parseInt(testChars, 1, 1));
}
 

import com.fasterxml.jackson.core.io.NumberInput; //导入依赖的package包/类
public void testLongBoundsChecks() throws Exception
{
    String minLong = String.valueOf(Long.MIN_VALUE).substring(1);
    String maxLong = String.valueOf(Long.MAX_VALUE);
    final String VALUE_491 = "1323372036854775807"; // is within range (JACKSON-491)
    final String OVERFLOW =  "9999999999999999999"; // and this one is clearly out

    assertTrue(NumberInput.inLongRange(minLong, true));
    assertTrue(NumberInput.inLongRange(maxLong, false));
    assertTrue(NumberInput.inLongRange(VALUE_491, true));
    assertTrue(NumberInput.inLongRange(VALUE_491, false));
    assertFalse(NumberInput.inLongRange(OVERFLOW, false));
    assertFalse(NumberInput.inLongRange(OVERFLOW, true));

    char[] cbuf = minLong.toCharArray();
    assertTrue(NumberInput.inLongRange(cbuf, 0, cbuf.length, true));
    cbuf = maxLong.toCharArray();
    assertTrue(NumberInput.inLongRange(cbuf, 0, cbuf.length, false));
    cbuf = VALUE_491.toCharArray();
    assertTrue(NumberInput.inLongRange(cbuf, 0, cbuf.length, true));
    assertTrue(NumberInput.inLongRange(cbuf, 0, cbuf.length, false));
    cbuf = OVERFLOW.toCharArray();
    assertFalse(NumberInput.inLongRange(cbuf, 0, cbuf.length, true));
    assertFalse(NumberInput.inLongRange(cbuf, 0, cbuf.length, false));
}
 

import com.fasterxml.jackson.core.io.NumberInput; //导入依赖的package包/类
public Date parse(String paramString, ParsePosition paramParsePosition)
{
  if (looksLikeISO8601(paramString))
    return parseAsISO8601(paramString, paramParsePosition);
  int i = paramString.length();
  int j;
  do
  {
    i--;
    if (i < 0)
      break;
    j = paramString.charAt(i);
  }
  while (((j < 48) || (j > 57)) && ((i <= 0) && (j == 45)));
  if ((i < 0) && (NumberInput.inLongRange(paramString, false)))
    return new Date(Long.parseLong(paramString));
  return parseAsRFC1123(paramString, paramParsePosition);
}
 

import com.fasterxml.jackson.core.io.NumberInput; //导入依赖的package包/类
private void _parseSlowInt(int expType, char[] buf, int offset, int len)
    throws IOException, JsonParseException
{
    String numStr = _textBuffer.contentsAsString();
    try {
        // [JACKSON-230] Some long cases still...
        if (NumberInput.inLongRange(buf, offset, len, _numberNegative)) {
            // Probably faster to construct a String, call parse, than to use BigInteger
            _numberLong = Long.parseLong(numStr);
            _numTypesValid = NR_LONG;
        } else {
            // nope, need the heavy guns... (rare case)
            _numberBigInt = new BigInteger(numStr);
            _numTypesValid = NR_BIGINT;
        }
    } catch (NumberFormatException nex) {
        // Can this ever occur? Due to overflow, maybe?
        _wrapError("Malformed numeric value '"+numStr+"'", nex);
    }
}
 

import com.fasterxml.jackson.core.io.NumberInput; //导入依赖的package包/类
protected void convertNumberToBigDecimal()
    throws IOException, JsonParseException
{
    /* 05-Aug-2008, tatus: Important note: this MUST start with
     *   more accurate representations, since we don't know which
     *   value is the original one (others get generated when
     *   requested)
     */

    if ((_numTypesValid & NR_DOUBLE) != 0) {
        /* Let's actually parse from String representation,
         * to avoid rounding errors that non-decimal floating operations
         * would incur
         */
        _numberBigDecimal = NumberInput.parseBigDecimal(getText());
    } else if ((_numTypesValid & NR_BIGINT) != 0) {
        _numberBigDecimal = new BigDecimal(_numberBigInt);
    } else if ((_numTypesValid & NR_LONG) != 0) {
        _numberBigDecimal = BigDecimal.valueOf(_numberLong);
    } else if ((_numTypesValid & NR_INT) != 0) {
        _numberBigDecimal = BigDecimal.valueOf(_numberInt);
    } else {
        _throwInternal();
    }
    _numTypesValid |= NR_BIGDECIMAL;
}
 

import com.fasterxml.jackson.core.io.NumberInput; //导入依赖的package包/类
private void _parseSlowIntValue(int expType, char[] buf, int offset, int len)
    throws IOException, JsonParseException
{
    String numStr = _textBuffer.contentsAsString();
    try {
        // [JACKSON-230] Some long cases still...
        if (NumberInput.inLongRange(buf, offset, len, _numberNegative)) {
            // Probably faster to construct a String, call parse, than to use BigInteger
            _numberLong = Long.parseLong(numStr);
            _numTypesValid = NR_LONG;
        } else {
            // nope, need the heavy guns... (rare case)
            _numberBigInt = new BigInteger(numStr);
            _numTypesValid = NR_BIGINT;
        }
    } catch (NumberFormatException nex) {
        // Can this ever occur? Due to overflow, maybe?
        _wrapError("Malformed numeric value '"+numStr+"'", nex);
    }
}
 

import com.fasterxml.jackson.core.io.NumberInput; //导入依赖的package包/类
private Long rangeCheckedLong(JsonParser parser, DeserializationContext context)
throws IOException {
    String text = parser.getText().trim();
    if (text.length() == 0) {
        return null;
    }
    try {
        return Long.valueOf(NumberInput.parseLong(text));
    }
    catch (Exception e) {
        throw context.weirdStringException(//NOSONAR
            _valueClass,
            "Over/underflow: numeric value (" + text +") out of range of Long ("
                + Long.MIN_VALUE + " to " + Long.MAX_VALUE + ")"
        );
    }
}
 

import com.fasterxml.jackson.core.io.NumberInput; //导入依赖的package包/类
protected final long _parseLongPrimitive(JsonParser jp, DeserializationContext ctxt)
    throws IOException, JsonProcessingException
{
    JsonToken t = jp.getCurrentToken();
    if (t == JsonToken.VALUE_NUMBER_INT || t == JsonToken.VALUE_NUMBER_FLOAT) {
        return jp.getLongValue();
    }
    if (t == JsonToken.VALUE_STRING) {
        String text = jp.getText().trim();
        if (text.length() == 0) {
            return 0L;
        }
        try {
            return NumberInput.parseLong(text);
        } catch (IllegalArgumentException iae) { }
        throw ctxt.weirdStringException(text, _valueClass, "not a valid long value");
    }
    if (t == JsonToken.VALUE_NULL) {
        return 0L;
    }
    throw ctxt.mappingException(_valueClass, t);
}
 

import com.fasterxml.jackson.core.io.NumberInput; //导入依赖的package包/类
@Override
public Date parse(String dateStr, ParsePosition pos)
{
    if (looksLikeISO8601(dateStr)) { // also includes "plain"
        return parseAsISO8601(dateStr, pos);
    }
    /* 14-Feb-2010, tatu: As per [JACKSON-236], better also
     *   consider "stringified" simple time stamp
     */
    int i = dateStr.length();
    while (--i >= 0) {
        char ch = dateStr.charAt(i);
        if (ch < '0' || ch > '9') break;
    }
    if (i < 0) { // all digits
        if (NumberInput.inLongRange(dateStr, false)) {
            return new Date(Long.parseLong(dateStr));
        }
    }
    // Otherwise, fall back to using RFC 1123
    return parseAsRFC1123(dateStr, pos);
}
 

import com.fasterxml.jackson.core.io.NumberInput; //导入依赖的package包/类
@Override
public int getValueAsInt(int defaultValue) throws IOException, JsonParseException
{
    if (_currToken != null) {
        switch (_currToken) {
        case VALUE_NUMBER_INT:
        case VALUE_NUMBER_FLOAT:
            return getIntValue();
        case VALUE_TRUE:
            return 1;
        case VALUE_FALSE:
        case VALUE_NULL:
            return 0;
        case VALUE_STRING:
            return NumberInput.parseAsInt(getText(), defaultValue);
        case VALUE_EMBEDDED_OBJECT:
            {
                Object value = this.getEmbeddedObject();
                if (value instanceof Number) {
                    return ((Number) value).intValue();
                }
            }
        }
    }
    return defaultValue;
}
 

import com.fasterxml.jackson.core.io.NumberInput; //导入依赖的package包/类
@Override
public long getValueAsLong(long defaultValue) throws IOException, JsonParseException
{
    if (_currToken != null) {
        switch (_currToken) {
        case VALUE_NUMBER_INT:
        case VALUE_NUMBER_FLOAT:
            return getLongValue();
        case VALUE_TRUE:
            return 1;
        case VALUE_FALSE:
        case VALUE_NULL:
            return 0;
        case VALUE_STRING:
            return NumberInput.parseAsLong(getText(), defaultValue);
        case VALUE_EMBEDDED_OBJECT:
            {
                Object value = this.getEmbeddedObject();
                if (value instanceof Number) {
                    return ((Number) value).longValue();
                }
            }
        }
    }
    return defaultValue;
}
 

import com.fasterxml.jackson.core.io.NumberInput; //导入依赖的package包/类
@Override
public double getValueAsDouble(double defaultValue) throws IOException, JsonParseException
{
    if (_currToken != null) {
        switch (_currToken) {
        case VALUE_NUMBER_INT:
        case VALUE_NUMBER_FLOAT:
            return getDoubleValue();
        case VALUE_TRUE:
            return 1;
        case VALUE_FALSE:
        case VALUE_NULL:
            return 0;
        case VALUE_STRING:
            return NumberInput.parseAsDouble(getText(), defaultValue);
        case VALUE_EMBEDDED_OBJECT:
            {
                Object value = this.getEmbeddedObject();
                if (value instanceof Number) {
                    return ((Number) value).doubleValue();
                }
            }
        }
    }
    return defaultValue;
}
 

import com.fasterxml.jackson.core.io.NumberInput; //导入依赖的package包/类
private final static int _parseIndex(String str) {
    final int len = str.length();
    // [core#133]: beware of super long indexes; assume we never
    // have arrays over 2 billion entries so ints are fine.
    if (len == 0 || len > 10) {
        return -1;
    }
    // [core#176]: no leading zeroes allowed
    char c = str.charAt(0);
    if (c <= '0') {
        return (len == 1 && c == '0') ? 0 : -1;
    }
    if (c > '9') {
        return -1;
    }
    for (int i = 1; i < len; ++i) {
        c = str.charAt(i);
        if (c > '9' || c < '0') {
            return -1;
        }
    }
    if (len == 10) {
        long l = NumberInput.parseLong(str);
        if (l > Integer.MAX_VALUE) {
            return -1;
        }
    }
    return NumberInput.parseInt(str);
}