com.fasterxml.jackson.core.json.UTF8StreamJsonParser Maven / Gradle / Ivy
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package com.fasterxml.jackson.core.json;
import java.io.*;
import com.fasterxml.jackson.core.*;
import com.fasterxml.jackson.core.base.ParserBase;
import com.fasterxml.jackson.core.io.CharTypes;
import com.fasterxml.jackson.core.io.IOContext;
import com.fasterxml.jackson.core.sym.*;
import com.fasterxml.jackson.core.util.*;
import static com.fasterxml.jackson.core.JsonTokenId.*;
/**
* This is a concrete implementation of {@link JsonParser}, which is
* based on a {@link java.io.InputStream} as the input source.
*
* Note: non-final since version 2.3.
*/
public class UTF8StreamJsonParser
extends ParserBase
{
final static byte BYTE_LF = (byte) '\n';
// This is the main input-code lookup table, fetched eagerly
private final static int[] _icUTF8 = CharTypes.getInputCodeUtf8();
// Latin1 encoding is not supported, but we do use 8-bit subset for
// pre-processing task, to simplify first pass, keep it fast.
protected final static int[] _icLatin1 = CharTypes.getInputCodeLatin1();
// White-space processing is done all the time, pre-fetch as well
private final static int[] _icWS = CharTypes.getInputCodeWS();
/*
/**********************************************************
/* Configuration
/**********************************************************
*/
/**
* Codec used for data binding when (if) requested; typically full
* ObjectMapper, but that abstract is not part of core
* package.
*/
protected ObjectCodec _objectCodec;
/**
* Symbol table that contains field names encountered so far
*/
final protected BytesToNameCanonicalizer _symbols;
/*
/**********************************************************
/* Parsing state
/**********************************************************
*/
/**
* Temporary buffer used for name parsing.
*/
protected int[] _quadBuffer = new int[16];
/**
* Flag that indicates that the current token has not yet
* been fully processed, and needs to be finished for
* some access (or skipped to obtain the next token)
*/
protected boolean _tokenIncomplete = false;
/**
* Temporary storage for partially parsed name bytes.
*/
private int _quad1;
/*
/**********************************************************
/* Input buffering (from former 'StreamBasedParserBase')
/**********************************************************
*/
protected InputStream _inputStream;
/*
/**********************************************************
/* Current input data
/**********************************************************
*/
/**
* Current buffer from which data is read; generally data is read into
* buffer from input source, but in some cases pre-loaded buffer
* is handed to the parser.
*/
protected byte[] _inputBuffer;
/**
* Flag that indicates whether the input buffer is recycable (and
* needs to be returned to recycler once we are done) or not.
*
* If it is not, it also means that parser can NOT modify underlying
* buffer.
*/
protected boolean _bufferRecyclable;
/*
/**********************************************************
/* Life-cycle
/**********************************************************
*/
public UTF8StreamJsonParser(IOContext ctxt, int features, InputStream in,
ObjectCodec codec, BytesToNameCanonicalizer sym,
byte[] inputBuffer, int start, int end,
boolean bufferRecyclable)
{
super(ctxt, features);
_inputStream = in;
_objectCodec = codec;
_symbols = sym;
_inputBuffer = inputBuffer;
_inputPtr = start;
_inputEnd = end;
_currInputRowStart = start;
// If we have offset, need to omit that from byte offset, so:
_currInputProcessed = -start;
_bufferRecyclable = bufferRecyclable;
}
@Override
public ObjectCodec getCodec() {
return _objectCodec;
}
@Override
public void setCodec(ObjectCodec c) {
_objectCodec = c;
}
/*
/**********************************************************
/* Overrides for life-cycle
/**********************************************************
*/
@Override
public int releaseBuffered(OutputStream out) throws IOException
{
int count = _inputEnd - _inputPtr;
if (count < 1) {
return 0;
}
// let's just advance ptr to end
int origPtr = _inputPtr;
out.write(_inputBuffer, origPtr, count);
return count;
}
@Override
public Object getInputSource() {
return _inputStream;
}
/*
/**********************************************************
/* Overrides, low-level reading
/**********************************************************
*/
@Override
protected final boolean loadMore()
throws IOException
{
_currInputProcessed += _inputEnd;
_currInputRowStart -= _inputEnd;
if (_inputStream != null) {
int count = _inputStream.read(_inputBuffer, 0, _inputBuffer.length);
if (count > 0) {
_inputPtr = 0;
_inputEnd = count;
return true;
}
// End of input
_closeInput();
// Should never return 0, so let's fail
if (count == 0) {
throw new IOException("InputStream.read() returned 0 characters when trying to read "+_inputBuffer.length+" bytes");
}
}
return false;
}
/**
* Helper method that will try to load at least specified number bytes in
* input buffer, possible moving existing data around if necessary
*/
protected final boolean _loadToHaveAtLeast(int minAvailable)
throws IOException
{
// No input stream, no leading (either we are closed, or have non-stream input source)
if (_inputStream == null) {
return false;
}
// Need to move remaining data in front?
int amount = _inputEnd - _inputPtr;
if (amount > 0 && _inputPtr > 0) {
_currInputProcessed += _inputPtr;
_currInputRowStart -= _inputPtr;
System.arraycopy(_inputBuffer, _inputPtr, _inputBuffer, 0, amount);
_inputEnd = amount;
} else {
_inputEnd = 0;
}
_inputPtr = 0;
while (_inputEnd < minAvailable) {
int count = _inputStream.read(_inputBuffer, _inputEnd, _inputBuffer.length - _inputEnd);
if (count < 1) {
// End of input
_closeInput();
// Should never return 0, so let's fail
if (count == 0) {
throw new IOException("InputStream.read() returned 0 characters when trying to read "+amount+" bytes");
}
return false;
}
_inputEnd += count;
}
return true;
}
@Override
protected void _closeInput() throws IOException
{
/* 25-Nov-2008, tatus: As per [JACKSON-16] we are not to call close()
* on the underlying InputStream, unless we "own" it, or auto-closing
* feature is enabled.
*/
if (_inputStream != null) {
if (_ioContext.isResourceManaged() || isEnabled(Feature.AUTO_CLOSE_SOURCE)) {
_inputStream.close();
}
_inputStream = null;
}
}
/**
* Method called to release internal buffers owned by the base
* reader. This may be called along with {@link #_closeInput} (for
* example, when explicitly closing this reader instance), or
* separately (if need be).
*/
@Override
protected void _releaseBuffers() throws IOException
{
super._releaseBuffers();
// Merge found symbols, if any:
_symbols.release();
if (_bufferRecyclable) {
byte[] buf = _inputBuffer;
if (buf != null) {
_inputBuffer = null;
_ioContext.releaseReadIOBuffer(buf);
}
}
}
/*
/**********************************************************
/* Public API, data access
/**********************************************************
*/
@Override
public String getText()
throws IOException, JsonParseException
{
if (_currToken == JsonToken.VALUE_STRING) {
if (_tokenIncomplete) {
_tokenIncomplete = false;
_finishString(); // only strings can be incomplete
}
return _textBuffer.contentsAsString();
}
return _getText2(_currToken);
}
// // // Let's override default impls for improved performance
// @since 2.1
@Override
public String getValueAsString() throws IOException, JsonParseException
{
if (_currToken == JsonToken.VALUE_STRING) {
if (_tokenIncomplete) {
_tokenIncomplete = false;
_finishString(); // only strings can be incomplete
}
return _textBuffer.contentsAsString();
}
return super.getValueAsString(null);
}
// @since 2.1
@Override
public String getValueAsString(String defValue) throws IOException, JsonParseException
{
if (_currToken == JsonToken.VALUE_STRING) {
if (_tokenIncomplete) {
_tokenIncomplete = false;
_finishString(); // only strings can be incomplete
}
return _textBuffer.contentsAsString();
}
return super.getValueAsString(defValue);
}
protected final String _getText2(JsonToken t)
{
if (t == null) {
return null;
}
switch (t.id()) {
case ID_FIELD_NAME:
return _parsingContext.getCurrentName();
case ID_STRING:
// fall through
case ID_NUMBER_INT:
case ID_NUMBER_FLOAT:
return _textBuffer.contentsAsString();
default:
return t.asString();
}
}
@Override
public char[] getTextCharacters()
throws IOException, JsonParseException
{
if (_currToken != null) { // null only before/after document
switch (_currToken.id()) {
case ID_FIELD_NAME:
if (!_nameCopied) {
String name = _parsingContext.getCurrentName();
int nameLen = name.length();
if (_nameCopyBuffer == null) {
_nameCopyBuffer = _ioContext.allocNameCopyBuffer(nameLen);
} else if (_nameCopyBuffer.length < nameLen) {
_nameCopyBuffer = new char[nameLen];
}
name.getChars(0, nameLen, _nameCopyBuffer, 0);
_nameCopied = true;
}
return _nameCopyBuffer;
case ID_STRING:
if (_tokenIncomplete) {
_tokenIncomplete = false;
_finishString(); // only strings can be incomplete
}
// fall through
case ID_NUMBER_INT:
case ID_NUMBER_FLOAT:
return _textBuffer.getTextBuffer();
default:
return _currToken.asCharArray();
}
}
return null;
}
@Override
public int getTextLength()
throws IOException, JsonParseException
{
if (_currToken != null) { // null only before/after document
switch (_currToken.id()) {
case ID_FIELD_NAME:
return _parsingContext.getCurrentName().length();
case ID_STRING:
if (_tokenIncomplete) {
_tokenIncomplete = false;
_finishString(); // only strings can be incomplete
}
// fall through
case ID_NUMBER_INT:
case ID_NUMBER_FLOAT:
return _textBuffer.size();
default:
return _currToken.asCharArray().length;
}
}
return 0;
}
@Override
public int getTextOffset() throws IOException, JsonParseException
{
// Most have offset of 0, only some may have other values:
if (_currToken != null) {
switch (_currToken.id()) {
case ID_FIELD_NAME:
return 0;
case ID_STRING:
if (_tokenIncomplete) {
_tokenIncomplete = false;
_finishString(); // only strings can be incomplete
}
// fall through
case ID_NUMBER_INT:
case ID_NUMBER_FLOAT:
return _textBuffer.getTextOffset();
default:
}
}
return 0;
}
@Override
public byte[] getBinaryValue(Base64Variant b64variant)
throws IOException, JsonParseException
{
if (_currToken != JsonToken.VALUE_STRING &&
(_currToken != JsonToken.VALUE_EMBEDDED_OBJECT || _binaryValue == null)) {
_reportError("Current token ("+_currToken+") not VALUE_STRING or VALUE_EMBEDDED_OBJECT, can not access as binary");
}
/* To ensure that we won't see inconsistent data, better clear up
* state...
*/
if (_tokenIncomplete) {
try {
_binaryValue = _decodeBase64(b64variant);
} catch (IllegalArgumentException iae) {
throw _constructError("Failed to decode VALUE_STRING as base64 ("+b64variant+"): "+iae.getMessage());
}
/* let's clear incomplete only now; allows for accessing other
* textual content in error cases
*/
_tokenIncomplete = false;
} else { // may actually require conversion...
if (_binaryValue == null) {
@SuppressWarnings("resource")
ByteArrayBuilder builder = _getByteArrayBuilder();
_decodeBase64(getText(), builder, b64variant);
_binaryValue = builder.toByteArray();
}
}
return _binaryValue;
}
@Override
public int readBinaryValue(Base64Variant b64variant, OutputStream out)
throws IOException, JsonParseException
{
// if we have already read the token, just use whatever we may have
if (!_tokenIncomplete || _currToken != JsonToken.VALUE_STRING) {
byte[] b = getBinaryValue(b64variant);
out.write(b);
return b.length;
}
// otherwise do "real" incremental parsing...
byte[] buf = _ioContext.allocBase64Buffer();
try {
return _readBinary(b64variant, out, buf);
} finally {
_ioContext.releaseBase64Buffer(buf);
}
}
protected int _readBinary(Base64Variant b64variant, OutputStream out,
byte[] buffer)
throws IOException, JsonParseException
{
int outputPtr = 0;
final int outputEnd = buffer.length - 3;
int outputCount = 0;
while (true) {
// first, we'll skip preceding white space, if any
int ch;
do {
if (_inputPtr >= _inputEnd) {
loadMoreGuaranteed();
}
ch = (int) _inputBuffer[_inputPtr++] & 0xFF;
} while (ch <= INT_SPACE);
int bits = b64variant.decodeBase64Char(ch);
if (bits < 0) { // reached the end, fair and square?
if (ch == INT_QUOTE) {
break;
}
bits = _decodeBase64Escape(b64variant, ch, 0);
if (bits < 0) { // white space to skip
continue;
}
}
// enough room? If not, flush
if (outputPtr > outputEnd) {
outputCount += outputPtr;
out.write(buffer, 0, outputPtr);
outputPtr = 0;
}
int decodedData = bits;
// then second base64 char; can't get padding yet, nor ws
if (_inputPtr >= _inputEnd) {
loadMoreGuaranteed();
}
ch = _inputBuffer[_inputPtr++] & 0xFF;
bits = b64variant.decodeBase64Char(ch);
if (bits < 0) {
bits = _decodeBase64Escape(b64variant, ch, 1);
}
decodedData = (decodedData << 6) | bits;
// third base64 char; can be padding, but not ws
if (_inputPtr >= _inputEnd) {
loadMoreGuaranteed();
}
ch = _inputBuffer[_inputPtr++] & 0xFF;
bits = b64variant.decodeBase64Char(ch);
// First branch: can get padding (-> 1 byte)
if (bits < 0) {
if (bits != Base64Variant.BASE64_VALUE_PADDING) {
// as per [JACKSON-631], could also just be 'missing' padding
if (ch == '"' && !b64variant.usesPadding()) {
decodedData >>= 4;
buffer[outputPtr++] = (byte) decodedData;
break;
}
bits = _decodeBase64Escape(b64variant, ch, 2);
}
if (bits == Base64Variant.BASE64_VALUE_PADDING) {
// Ok, must get padding
if (_inputPtr >= _inputEnd) {
loadMoreGuaranteed();
}
ch = _inputBuffer[_inputPtr++] & 0xFF;
if (!b64variant.usesPaddingChar(ch)) {
throw reportInvalidBase64Char(b64variant, ch, 3, "expected padding character '"+b64variant.getPaddingChar()+"'");
}
// Got 12 bits, only need 8, need to shift
decodedData >>= 4;
buffer[outputPtr++] = (byte) decodedData;
continue;
}
}
// Nope, 2 or 3 bytes
decodedData = (decodedData << 6) | bits;
// fourth and last base64 char; can be padding, but not ws
if (_inputPtr >= _inputEnd) {
loadMoreGuaranteed();
}
ch = _inputBuffer[_inputPtr++] & 0xFF;
bits = b64variant.decodeBase64Char(ch);
if (bits < 0) {
if (bits != Base64Variant.BASE64_VALUE_PADDING) {
// as per [JACKSON-631], could also just be 'missing' padding
if (ch == '"' && !b64variant.usesPadding()) {
decodedData >>= 2;
buffer[outputPtr++] = (byte) (decodedData >> 8);
buffer[outputPtr++] = (byte) decodedData;
break;
}
bits = _decodeBase64Escape(b64variant, ch, 3);
}
if (bits == Base64Variant.BASE64_VALUE_PADDING) {
/* With padding we only get 2 bytes; but we have
* to shift it a bit so it is identical to triplet
* case with partial output.
* 3 chars gives 3x6 == 18 bits, of which 2 are
* dummies, need to discard:
*/
decodedData >>= 2;
buffer[outputPtr++] = (byte) (decodedData >> 8);
buffer[outputPtr++] = (byte) decodedData;
continue;
}
}
// otherwise, our triplet is now complete
decodedData = (decodedData << 6) | bits;
buffer[outputPtr++] = (byte) (decodedData >> 16);
buffer[outputPtr++] = (byte) (decodedData >> 8);
buffer[outputPtr++] = (byte) decodedData;
}
_tokenIncomplete = false;
if (outputPtr > 0) {
outputCount += outputPtr;
out.write(buffer, 0, outputPtr);
}
return outputCount;
}
// As per [Issue#108], must ensure we call the right method
@Override
public JsonLocation getTokenLocation()
{
return new JsonLocation(_ioContext.getSourceReference(),
getTokenCharacterOffset(), -1L, // bytes, chars
getTokenLineNr(),
getTokenColumnNr());
}
// As per [Issue#108], must ensure we call the right method
@Override
public JsonLocation getCurrentLocation()
{
int col = _inputPtr - _currInputRowStart + 1; // 1-based
return new JsonLocation(_ioContext.getSourceReference(),
_currInputProcessed + _inputPtr, -1L, // bytes, chars
_currInputRow, col);
}
/*
/**********************************************************
/* Public API, traversal, basic
/**********************************************************
*/
/**
* @return Next token from the stream, if any found, or null
* to indicate end-of-input
*/
@Override
public JsonToken nextToken()
throws IOException, JsonParseException
{
_numTypesValid = NR_UNKNOWN;
/* First: field names are special -- we will always tokenize
* (part of) value along with field name to simplify
* state handling. If so, can and need to use secondary token:
*/
if (_currToken == JsonToken.FIELD_NAME) {
return _nextAfterName();
}
if (_tokenIncomplete) {
_skipString(); // only strings can be partial
}
int i = _skipWSOrEnd();
if (i < 0) { // end-of-input
/* 19-Feb-2009, tatu: Should actually close/release things
* like input source, symbol table and recyclable buffers now.
*/
close();
return (_currToken = null);
}
/* First, need to ensure we know the starting location of token
* after skipping leading white space
*/
_tokenInputTotal = _currInputProcessed + _inputPtr - 1;
_tokenInputRow = _currInputRow;
_tokenInputCol = _inputPtr - _currInputRowStart - 1;
// finally: clear any data retained so far
_binaryValue = null;
// Closing scope?
if (i == INT_RBRACKET) {
if (!_parsingContext.inArray()) {
_reportMismatchedEndMarker(i, '}');
}
_parsingContext = _parsingContext.getParent();
return (_currToken = JsonToken.END_ARRAY);
}
if (i == INT_RCURLY) {
if (!_parsingContext.inObject()) {
_reportMismatchedEndMarker(i, ']');
}
_parsingContext = _parsingContext.getParent();
return (_currToken = JsonToken.END_OBJECT);
}
// Nope: do we then expect a comma?
if (_parsingContext.expectComma()) {
if (i != INT_COMMA) {
_reportUnexpectedChar(i, "was expecting comma to separate "+_parsingContext.getTypeDesc()+" entries");
}
i = _skipWS();
}
/* And should we now have a name? Always true for
* Object contexts, since the intermediate 'expect-value'
* state is never retained.
*/
if (!_parsingContext.inObject()) {
return _nextTokenNotInObject(i);
}
// So first parse the field name itself:
Name n = _parseName(i);
_parsingContext.setCurrentName(n.getName());
_currToken = JsonToken.FIELD_NAME;
// Let's do a quickie check:
if (_inputPtr < _inputEnd && _inputBuffer[_inputPtr] == ':') {
++_inputPtr;
} else {
i = _skipWS();
if (i != INT_COLON) {
_reportUnexpectedChar(i, "was expecting a colon to separate field name and value");
}
}
i = _skipWS();
// Ok: we must have a value... what is it? Strings are very common, check first:
if (i == INT_QUOTE) {
_tokenIncomplete = true;
_nextToken = JsonToken.VALUE_STRING;
return _currToken;
}
JsonToken t;
switch (i) {
case '[':
t = JsonToken.START_ARRAY;
break;
case '{':
t = JsonToken.START_OBJECT;
break;
case ']':
case '}':
// Error: neither is valid at this point; valid closers have
// been handled earlier
_reportUnexpectedChar(i, "expected a value");
case 't':
_matchToken("true", 1);
t = JsonToken.VALUE_TRUE;
break;
case 'f':
_matchToken("false", 1);
t = JsonToken.VALUE_FALSE;
break;
case 'n':
_matchToken("null", 1);
t = JsonToken.VALUE_NULL;
break;
case '-':
/* Should we have separate handling for plus? Although
* it is not allowed per se, it may be erroneously used,
* and could be indicate by a more specific error message.
*/
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
t = _parseNumber(i);
break;
default:
t = _handleUnexpectedValue(i);
}
_nextToken = t;
return _currToken;
}
private final JsonToken _nextTokenNotInObject(int i)
throws IOException, JsonParseException
{
if (i == INT_QUOTE) {
_tokenIncomplete = true;
return (_currToken = JsonToken.VALUE_STRING);
}
switch (i) {
case '[':
_parsingContext = _parsingContext.createChildArrayContext(_tokenInputRow, _tokenInputCol);
return (_currToken = JsonToken.START_ARRAY);
case '{':
_parsingContext = _parsingContext.createChildObjectContext(_tokenInputRow, _tokenInputCol);
return (_currToken = JsonToken.START_OBJECT);
case ']':
case '}':
// Error: neither is valid at this point; valid closers have
// been handled earlier
_reportUnexpectedChar(i, "expected a value");
case 't':
_matchToken("true", 1);
return (_currToken = JsonToken.VALUE_TRUE);
case 'f':
_matchToken("false", 1);
return (_currToken = JsonToken.VALUE_FALSE);
case 'n':
_matchToken("null", 1);
return (_currToken = JsonToken.VALUE_NULL);
case '-':
/* Should we have separate handling for plus? Although
* it is not allowed per se, it may be erroneously used,
* and could be indicate by a more specific error message.
*/
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
return (_currToken = _parseNumber(i));
}
return (_currToken = _handleUnexpectedValue(i));
}
private final JsonToken _nextAfterName()
{
_nameCopied = false; // need to invalidate if it was copied
JsonToken t = _nextToken;
_nextToken = null;
// Also: may need to start new context?
if (t == JsonToken.START_ARRAY) {
_parsingContext = _parsingContext.createChildArrayContext(_tokenInputRow, _tokenInputCol);
} else if (t == JsonToken.START_OBJECT) {
_parsingContext = _parsingContext.createChildObjectContext(_tokenInputRow, _tokenInputCol);
}
return (_currToken = t);
}
/*
/**********************************************************
/* Public API, traversal, nextXxxValue/nextFieldName
/**********************************************************
*/
@Override
public boolean nextFieldName(SerializableString str)
throws IOException, JsonParseException
{
// // // Note: most of code below is copied from nextToken()
_numTypesValid = NR_UNKNOWN;
if (_currToken == JsonToken.FIELD_NAME) { // can't have name right after name
_nextAfterName();
return false;
}
if (_tokenIncomplete) {
_skipString();
}
int i = _skipWSOrEnd();
if (i < 0) { // end-of-input
close();
_currToken = null;
return false;
}
_tokenInputTotal = _currInputProcessed + _inputPtr - 1;
_tokenInputRow = _currInputRow;
_tokenInputCol = _inputPtr - _currInputRowStart - 1;
// finally: clear any data retained so far
_binaryValue = null;
// Closing scope?
if (i == INT_RBRACKET) {
if (!_parsingContext.inArray()) {
_reportMismatchedEndMarker(i, '}');
}
_parsingContext = _parsingContext.getParent();
_currToken = JsonToken.END_ARRAY;
return false;
}
if (i == INT_RCURLY) {
if (!_parsingContext.inObject()) {
_reportMismatchedEndMarker(i, ']');
}
_parsingContext = _parsingContext.getParent();
_currToken = JsonToken.END_OBJECT;
return false;
}
// Nope: do we then expect a comma?
if (_parsingContext.expectComma()) {
if (i != INT_COMMA) {
_reportUnexpectedChar(i, "was expecting comma to separate "+_parsingContext.getTypeDesc()+" entries");
}
i = _skipWS();
}
if (!_parsingContext.inObject()) {
_nextTokenNotInObject(i);
return false;
}
// // // This part differs, name parsing
if (i == INT_QUOTE) {
// when doing literal match, must consider escaping:
byte[] nameBytes = str.asQuotedUTF8();
final int len = nameBytes.length;
if ((_inputPtr + len) < _inputEnd) { // maybe...
// first check length match by
final int end = _inputPtr+len;
if (_inputBuffer[end] == INT_QUOTE) {
int offset = 0;
final int ptr = _inputPtr;
while (true) {
if (offset == len) { // yes, match!
_inputPtr = end+1; // skip current value first
// First part is simple; setting of name
_parsingContext.setCurrentName(str.getValue());
_currToken = JsonToken.FIELD_NAME;
// But then we also must handle following value etc
_isNextTokenNameYes();
return true;
}
if (nameBytes[offset] != _inputBuffer[ptr+offset]) {
break;
}
++offset;
}
}
}
}
return _isNextTokenNameMaybe(i, str);
}
private final void _isNextTokenNameYes()
throws IOException, JsonParseException
{
// very first thing: common case, colon, value, no white space
int i;
if (_inputPtr < (_inputEnd-1) && _inputBuffer[_inputPtr] == INT_COLON) { // fast case first
i = _inputBuffer[++_inputPtr];
++_inputPtr;
if (i == INT_QUOTE) {
_tokenIncomplete = true;
_nextToken = JsonToken.VALUE_STRING;
return;
}
if (i == INT_LCURLY) {
_nextToken = JsonToken.START_OBJECT;
return;
}
if (i == INT_LBRACKET) {
_nextToken = JsonToken.START_ARRAY;
return;
}
i &= 0xFF;
if (i <= INT_SPACE || i == INT_SLASH) {
--_inputPtr;
i = _skipWS();
}
} else {
i = _skipColon();
}
switch (i) {
case '"':
_tokenIncomplete = true;
_nextToken = JsonToken.VALUE_STRING;
return;
case '[':
_nextToken = JsonToken.START_ARRAY;
return;
case '{':
_nextToken = JsonToken.START_OBJECT;
return;
case ']':
case '}':
_reportUnexpectedChar(i, "expected a value");
case 't':
_matchToken("true", 1);
_nextToken = JsonToken.VALUE_TRUE;
return;
case 'f':
_matchToken("false", 1);
_nextToken = JsonToken.VALUE_FALSE;
return;
case 'n':
_matchToken("null", 1);
_nextToken = JsonToken.VALUE_NULL;
return;
case '-':
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
_nextToken = _parseNumber(i);
return;
}
_nextToken = _handleUnexpectedValue(i);
}
private final boolean _isNextTokenNameMaybe(int i, SerializableString str)
throws IOException, JsonParseException
{
// // // and this is back to standard nextToken()
Name n = _parseName(i);
final boolean match;
{
String nameStr = n.getName();
_parsingContext.setCurrentName(nameStr);
match = nameStr.equals(str.getValue());
}
_currToken = JsonToken.FIELD_NAME;
i = _skipWS();
if (i != INT_COLON) {
_reportUnexpectedChar(i, "was expecting a colon to separate field name and value");
}
i = _skipWS();
// Ok: we must have a value... what is it? Strings are very common, check first:
if (i == INT_QUOTE) {
_tokenIncomplete = true;
_nextToken = JsonToken.VALUE_STRING;
return match;
}
JsonToken t;
switch (i) {
case '[':
t = JsonToken.START_ARRAY;
break;
case '{':
t = JsonToken.START_OBJECT;
break;
case ']':
case '}':
_reportUnexpectedChar(i, "expected a value");
case 't':
_matchToken("true", 1);
t = JsonToken.VALUE_TRUE;
break;
case 'f':
_matchToken("false", 1);
t = JsonToken.VALUE_FALSE;
break;
case 'n':
_matchToken("null", 1);
t = JsonToken.VALUE_NULL;
break;
case '-':
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
t = _parseNumber(i);
break;
default:
t = _handleUnexpectedValue(i);
}
_nextToken = t;
return match;
}
@Override
public String nextTextValue()
throws IOException, JsonParseException
{
// two distinct cases; either got name and we know next type, or 'other'
if (_currToken == JsonToken.FIELD_NAME) { // mostly copied from '_nextAfterName'
_nameCopied = false;
JsonToken t = _nextToken;
_nextToken = null;
_currToken = t;
if (t == JsonToken.VALUE_STRING) {
if (_tokenIncomplete) {
_tokenIncomplete = false;
_finishString();
}
return _textBuffer.contentsAsString();
}
if (t == JsonToken.START_ARRAY) {
_parsingContext = _parsingContext.createChildArrayContext(_tokenInputRow, _tokenInputCol);
} else if (t == JsonToken.START_OBJECT) {
_parsingContext = _parsingContext.createChildObjectContext(_tokenInputRow, _tokenInputCol);
}
return null;
}
// !!! TODO: optimize this case as well
return (nextToken() == JsonToken.VALUE_STRING) ? getText() : null;
}
@Override
public int nextIntValue(int defaultValue)
throws IOException, JsonParseException
{
// two distinct cases; either got name and we know next type, or 'other'
if (_currToken == JsonToken.FIELD_NAME) { // mostly copied from '_nextAfterName'
_nameCopied = false;
JsonToken t = _nextToken;
_nextToken = null;
_currToken = t;
if (t == JsonToken.VALUE_NUMBER_INT) {
return getIntValue();
}
if (t == JsonToken.START_ARRAY) {
_parsingContext = _parsingContext.createChildArrayContext(_tokenInputRow, _tokenInputCol);
} else if (t == JsonToken.START_OBJECT) {
_parsingContext = _parsingContext.createChildObjectContext(_tokenInputRow, _tokenInputCol);
}
return defaultValue;
}
// !!! TODO: optimize this case as well
return (nextToken() == JsonToken.VALUE_NUMBER_INT) ? getIntValue() : defaultValue;
}
@Override
public long nextLongValue(long defaultValue)
throws IOException, JsonParseException
{
// two distinct cases; either got name and we know next type, or 'other'
if (_currToken == JsonToken.FIELD_NAME) { // mostly copied from '_nextAfterName'
_nameCopied = false;
JsonToken t = _nextToken;
_nextToken = null;
_currToken = t;
if (t == JsonToken.VALUE_NUMBER_INT) {
return getLongValue();
}
if (t == JsonToken.START_ARRAY) {
_parsingContext = _parsingContext.createChildArrayContext(_tokenInputRow, _tokenInputCol);
} else if (t == JsonToken.START_OBJECT) {
_parsingContext = _parsingContext.createChildObjectContext(_tokenInputRow, _tokenInputCol);
}
return defaultValue;
}
// !!! TODO: optimize this case as well
return (nextToken() == JsonToken.VALUE_NUMBER_INT) ? getLongValue() : defaultValue;
}
@Override
public Boolean nextBooleanValue()
throws IOException, JsonParseException
{
// two distinct cases; either got name and we know next type, or 'other'
if (_currToken == JsonToken.FIELD_NAME) { // mostly copied from '_nextAfterName'
_nameCopied = false;
JsonToken t = _nextToken;
_nextToken = null;
_currToken = t;
if (t == JsonToken.VALUE_TRUE) {
return Boolean.TRUE;
}
if (t == JsonToken.VALUE_FALSE) {
return Boolean.FALSE;
}
if (t == JsonToken.START_ARRAY) {
_parsingContext = _parsingContext.createChildArrayContext(_tokenInputRow, _tokenInputCol);
} else if (t == JsonToken.START_OBJECT) {
_parsingContext = _parsingContext.createChildObjectContext(_tokenInputRow, _tokenInputCol);
}
return null;
}
switch (nextToken().id()) {
case ID_TRUE:
return Boolean.TRUE;
case ID_FALSE:
return Boolean.FALSE;
default:
return null;
}
}
/*
/**********************************************************
/* Internal methods, number parsing
/* (note: in 1.6 and prior, part of "Utf8NumericParser"
/**********************************************************
*/
/**
* Initial parsing method for number values. It needs to be able
* to parse enough input to be able to determine whether the
* value is to be considered a simple integer value, or a more
* generic decimal value: latter of which needs to be expressed
* as a floating point number. The basic rule is that if the number
* has no fractional or exponential part, it is an integer; otherwise
* a floating point number.
*
* Because much of input has to be processed in any case, no partial
* parsing is done: all input text will be stored for further
* processing. However, actual numeric value conversion will be
* deferred, since it is usually the most complicated and costliest
* part of processing.
*/
protected JsonToken _parseNumber(int c)
throws IOException, JsonParseException
{
char[] outBuf = _textBuffer.emptyAndGetCurrentSegment();
int outPtr = 0;
boolean negative = (c == INT_MINUS);
// Need to prepend sign?
if (negative) {
outBuf[outPtr++] = '-';
// Must have something after sign too
if (_inputPtr >= _inputEnd) {
loadMoreGuaranteed();
}
c = (int) _inputBuffer[_inputPtr++] & 0xFF;
// Note: must be followed by a digit
if (c < INT_0 || c > INT_9) {
return _handleInvalidNumberStart(c, true);
}
}
// One special case: if first char is 0, must not be followed by a digit
if (c == INT_0) {
c = _verifyNoLeadingZeroes();
}
// Ok: we can first just add digit we saw first:
outBuf[outPtr++] = (char) c;
int intLen = 1;
// And then figure out how far we can read without further checks:
int end = _inputPtr + outBuf.length;
if (end > _inputEnd) {
end = _inputEnd;
}
// With this, we have a nice and tight loop:
while (true) {
if (_inputPtr >= end) {
// Long enough to be split across boundary, so:
return _parserNumber2(outBuf, outPtr, negative, intLen);
}
c = (int) _inputBuffer[_inputPtr++] & 0xFF;
if (c < INT_0 || c > INT_9) {
break;
}
++intLen;
if (outPtr >= outBuf.length) {
outBuf = _textBuffer.finishCurrentSegment();
outPtr = 0;
}
outBuf[outPtr++] = (char) c;
}
if (c == '.' || c == 'e' || c == 'E') {
return _parseFloat(outBuf, outPtr, c, negative, intLen);
}
--_inputPtr; // to push back trailing char (comma etc)
_textBuffer.setCurrentLength(outPtr);
// As per #105, need separating space between root values; check here
if (_parsingContext.inRoot()) {
_verifyRootSpace(c);
}
// And there we have it!
return resetInt(negative, intLen);
}
/**
* Method called to handle parsing when input is split across buffer boundary
* (or output is longer than segment used to store it)
*/
private final JsonToken _parserNumber2(char[] outBuf, int outPtr, boolean negative,
int intPartLength)
throws IOException, JsonParseException
{
// Ok, parse the rest
while (true) {
if (_inputPtr >= _inputEnd && !loadMore()) {
_textBuffer.setCurrentLength(outPtr);
return resetInt(negative, intPartLength);
}
int c = (int) _inputBuffer[_inputPtr++] & 0xFF;
if (c > INT_9 || c < INT_0) {
if (c == '.' || c == 'e' || c == 'E') {
return _parseFloat(outBuf, outPtr, c, negative, intPartLength);
}
break;
}
if (outPtr >= outBuf.length) {
outBuf = _textBuffer.finishCurrentSegment();
outPtr = 0;
}
outBuf[outPtr++] = (char) c;
++intPartLength;
}
--_inputPtr; // to push back trailing char (comma etc)
_textBuffer.setCurrentLength(outPtr);
// As per #105, need separating space between root values; check here
if (_parsingContext.inRoot()) {
_verifyRootSpace(_inputBuffer[_inputPtr++] & 0xFF);
}
// And there we have it!
return resetInt(negative, intPartLength);
}
/**
* Method called when we have seen one zero, and want to ensure
* it is not followed by another
*/
private final int _verifyNoLeadingZeroes()
throws IOException, JsonParseException
{
// Ok to have plain "0"
if (_inputPtr >= _inputEnd && !loadMore()) {
return INT_0;
}
int ch = _inputBuffer[_inputPtr] & 0xFF;
// if not followed by a number (probably '.'); return zero as is, to be included
if (ch < INT_0 || ch > INT_9) {
return INT_0;
}
// [JACKSON-358]: we may want to allow them, after all...
if (!isEnabled(Feature.ALLOW_NUMERIC_LEADING_ZEROS)) {
reportInvalidNumber("Leading zeroes not allowed");
}
// if so, just need to skip either all zeroes (if followed by number); or all but one (if non-number)
++_inputPtr; // Leading zero to be skipped
if (ch == INT_0) {
while (_inputPtr < _inputEnd || loadMore()) {
ch = _inputBuffer[_inputPtr] & 0xFF;
if (ch < INT_0 || ch > INT_9) { // followed by non-number; retain one zero
return INT_0;
}
++_inputPtr; // skip previous zeroes
if (ch != INT_0) { // followed by other number; return
break;
}
}
}
return ch;
}
private final JsonToken _parseFloat(char[] outBuf, int outPtr, int c,
boolean negative, int integerPartLength)
throws IOException, JsonParseException
{
int fractLen = 0;
boolean eof = false;
// And then see if we get other parts
if (c == '.') { // yes, fraction
outBuf[outPtr++] = (char) c;
fract_loop:
while (true) {
if (_inputPtr >= _inputEnd && !loadMore()) {
eof = true;
break fract_loop;
}
c = (int) _inputBuffer[_inputPtr++] & 0xFF;
if (c < INT_0 || c > INT_9) {
break fract_loop;
}
++fractLen;
if (outPtr >= outBuf.length) {
outBuf = _textBuffer.finishCurrentSegment();
outPtr = 0;
}
outBuf[outPtr++] = (char) c;
}
// must be followed by sequence of ints, one minimum
if (fractLen == 0) {
reportUnexpectedNumberChar(c, "Decimal point not followed by a digit");
}
}
int expLen = 0;
if (c == 'e' || c == 'E') { // exponent?
if (outPtr >= outBuf.length) {
outBuf = _textBuffer.finishCurrentSegment();
outPtr = 0;
}
outBuf[outPtr++] = (char) c;
// Not optional, can require that we get one more char
if (_inputPtr >= _inputEnd) {
loadMoreGuaranteed();
}
c = (int) _inputBuffer[_inputPtr++] & 0xFF;
// Sign indicator?
if (c == '-' || c == '+') {
if (outPtr >= outBuf.length) {
outBuf = _textBuffer.finishCurrentSegment();
outPtr = 0;
}
outBuf[outPtr++] = (char) c;
// Likewise, non optional:
if (_inputPtr >= _inputEnd) {
loadMoreGuaranteed();
}
c = (int) _inputBuffer[_inputPtr++] & 0xFF;
}
exp_loop:
while (c <= INT_9 && c >= INT_0) {
++expLen;
if (outPtr >= outBuf.length) {
outBuf = _textBuffer.finishCurrentSegment();
outPtr = 0;
}
outBuf[outPtr++] = (char) c;
if (_inputPtr >= _inputEnd && !loadMore()) {
eof = true;
break exp_loop;
}
c = (int) _inputBuffer[_inputPtr++] & 0xFF;
}
// must be followed by sequence of ints, one minimum
if (expLen == 0) {
reportUnexpectedNumberChar(c, "Exponent indicator not followed by a digit");
}
}
// Ok; unless we hit end-of-input, need to push last char read back
if (!eof) {
--_inputPtr;
// As per #105, need separating space between root values; check here
if (_parsingContext.inRoot()) {
_verifyRootSpace(c);
}
}
_textBuffer.setCurrentLength(outPtr);
// And there we have it!
return resetFloat(negative, integerPartLength, fractLen, expLen);
}
/**
* Method called to ensure that a root-value is followed by a space
* token.
*
* NOTE: caller MUST ensure there is at least one character available;
* and that input pointer is AT given char (not past)
*/
private final void _verifyRootSpace(int ch) throws IOException
{
// caller had pushed it back, before calling; reset
++_inputPtr;
// TODO? Handle UTF-8 char decoding for error reporting
switch (ch) {
case ' ':
case '\t':
return;
case '\r':
_skipCR();
return;
case '\n':
++_currInputRow;
_currInputRowStart = _inputPtr;
return;
}
_reportMissingRootWS(ch);
}
/*
/**********************************************************
/* Internal methods, secondary parsing
/**********************************************************
*/
protected Name _parseName(int i) throws IOException
{
if (i != INT_QUOTE) {
return _handleOddName(i);
}
// First: can we optimize out bounds checks?
if ((_inputPtr + 9) > _inputEnd) { // Need 8 chars, plus one trailing (quote)
return slowParseName();
}
// If so, can also unroll loops nicely
/* 25-Nov-2008, tatu: This may seem weird, but here we do
* NOT want to worry about UTF-8 decoding. Rather, we'll
* assume that part is ok (if not it will get caught
* later on), and just handle quotes and backslashes here.
*/
final byte[] input = _inputBuffer;
final int[] codes = _icLatin1;
int q = input[_inputPtr++] & 0xFF;
if (codes[q] == 0) {
i = input[_inputPtr++] & 0xFF;
if (codes[i] == 0) {
q = (q << 8) | i;
i = input[_inputPtr++] & 0xFF;
if (codes[i] == 0) {
q = (q << 8) | i;
i = input[_inputPtr++] & 0xFF;
if (codes[i] == 0) {
q = (q << 8) | i;
i = input[_inputPtr++] & 0xFF;
if (codes[i] == 0) {
_quad1 = q;
return parseMediumName(i, codes);
}
if (i == INT_QUOTE) { // one byte/char case or broken
return findName(q, 4);
}
return parseName(q, i, 4);
}
if (i == INT_QUOTE) { // one byte/char case or broken
return findName(q, 3);
}
return parseName(q, i, 3);
}
if (i == INT_QUOTE) { // one byte/char case or broken
return findName(q, 2);
}
return parseName(q, i, 2);
}
if (i == INT_QUOTE) { // one byte/char case or broken
return findName(q, 1);
}
return parseName(q, i, 1);
}
if (q == INT_QUOTE) { // special case, ""
return BytesToNameCanonicalizer.getEmptyName();
}
return parseName(0, q, 0); // quoting or invalid char
}
protected Name parseMediumName(int q2, final int[] codes) throws IOException
{
// Ok, got 5 name bytes so far
int i = _inputBuffer[_inputPtr++] & 0xFF;
if (codes[i] != 0) {
if (i == INT_QUOTE) { // 5 bytes
return findName(_quad1, q2, 1);
}
return parseName(_quad1, q2, i, 1); // quoting or invalid char
}
q2 = (q2 << 8) | i;
i = _inputBuffer[_inputPtr++] & 0xFF;
if (codes[i] != 0) {
if (i == INT_QUOTE) { // 6 bytes
return findName(_quad1, q2, 2);
}
return parseName(_quad1, q2, i, 2);
}
q2 = (q2 << 8) | i;
i = _inputBuffer[_inputPtr++] & 0xFF;
if (codes[i] != 0) {
if (i == INT_QUOTE) { // 7 bytes
return findName(_quad1, q2, 3);
}
return parseName(_quad1, q2, i, 3);
}
q2 = (q2 << 8) | i;
i = _inputBuffer[_inputPtr++] & 0xFF;
if (codes[i] != 0) {
if (i == INT_QUOTE) { // 8 bytes
return findName(_quad1, q2, 4);
}
return parseName(_quad1, q2, i, 4);
}
_quadBuffer[0] = _quad1;
_quadBuffer[1] = q2;
return parseLongName(i);
}
protected Name parseLongName(int q) throws IOException
{
// As explained above, will ignore UTF-8 encoding at this point
final int[] codes = _icLatin1;
int qlen = 2;
while (true) {
/* Let's offline if we hit buffer boundary (otherwise would
* need to [try to] align input, which is bit complicated
* and may not always be possible)
*/
if ((_inputEnd - _inputPtr) < 4) {
return parseEscapedName(_quadBuffer, qlen, 0, q, 0);
}
// Otherwise can skip boundary checks for 4 bytes in loop
int i = _inputBuffer[_inputPtr++] & 0xFF;
if (codes[i] != 0) {
if (i == INT_QUOTE) {
return findName(_quadBuffer, qlen, q, 1);
}
return parseEscapedName(_quadBuffer, qlen, q, i, 1);
}
q = (q << 8) | i;
i = _inputBuffer[_inputPtr++] & 0xFF;
if (codes[i] != 0) {
if (i == INT_QUOTE) {
return findName(_quadBuffer, qlen, q, 2);
}
return parseEscapedName(_quadBuffer, qlen, q, i, 2);
}
q = (q << 8) | i;
i = _inputBuffer[_inputPtr++] & 0xFF;
if (codes[i] != 0) {
if (i == INT_QUOTE) {
return findName(_quadBuffer, qlen, q, 3);
}
return parseEscapedName(_quadBuffer, qlen, q, i, 3);
}
q = (q << 8) | i;
i = _inputBuffer[_inputPtr++] & 0xFF;
if (codes[i] != 0) {
if (i == INT_QUOTE) {
return findName(_quadBuffer, qlen, q, 4);
}
return parseEscapedName(_quadBuffer, qlen, q, i, 4);
}
// Nope, no end in sight. Need to grow quad array etc
if (qlen >= _quadBuffer.length) {
_quadBuffer = growArrayBy(_quadBuffer, qlen);
}
_quadBuffer[qlen++] = q;
q = i;
}
}
/**
* Method called when not even first 8 bytes are guaranteed
* to come consequtively. Happens rarely, so this is offlined;
* plus we'll also do full checks for escaping etc.
*/
protected Name slowParseName() throws IOException
{
if (_inputPtr >= _inputEnd) {
if (!loadMore()) {
_reportInvalidEOF(": was expecting closing '\"' for name");
}
}
int i = _inputBuffer[_inputPtr++] & 0xFF;
if (i == INT_QUOTE) { // special case, ""
return BytesToNameCanonicalizer.getEmptyName();
}
return parseEscapedName(_quadBuffer, 0, 0, i, 0);
}
private final Name parseName(int q1, int ch, int lastQuadBytes) throws IOException
{
return parseEscapedName(_quadBuffer, 0, q1, ch, lastQuadBytes);
}
private final Name parseName(int q1, int q2, int ch, int lastQuadBytes) throws IOException
{
_quadBuffer[0] = q1;
return parseEscapedName(_quadBuffer, 1, q2, ch, lastQuadBytes);
}
/**
* Slower parsing method which is generally branched to when
* an escape sequence is detected (or alternatively for long
* names, or ones crossing input buffer boundary). In any case,
* needs to be able to handle more exceptional cases, gets
* slower, and hance is offlined to a separate method.
*/
protected Name parseEscapedName(int[] quads, int qlen, int currQuad, int ch,
int currQuadBytes) throws IOException
{
/* 25-Nov-2008, tatu: This may seem weird, but here we do
* NOT want to worry about UTF-8 decoding. Rather, we'll
* assume that part is ok (if not it will get caught
* later on), and just handle quotes and backslashes here.
*/
final int[] codes = _icLatin1;
while (true) {
if (codes[ch] != 0) {
if (ch == INT_QUOTE) { // we are done
break;
}
// Unquoted white space?
if (ch != INT_BACKSLASH) {
// As per [JACKSON-208], call can now return:
_throwUnquotedSpace(ch, "name");
} else {
// Nope, escape sequence
ch = _decodeEscaped();
}
/* Oh crap. May need to UTF-8 (re-)encode it, if it's
* beyond 7-bit ascii. Gets pretty messy.
* If this happens often, may want to use different name
* canonicalization to avoid these hits.
*/
if (ch > 127) {
// Ok, we'll need room for first byte right away
if (currQuadBytes >= 4) {
if (qlen >= quads.length) {
_quadBuffer = quads = growArrayBy(quads, quads.length);
}
quads[qlen++] = currQuad;
currQuad = 0;
currQuadBytes = 0;
}
if (ch < 0x800) { // 2-byte
currQuad = (currQuad << 8) | (0xc0 | (ch >> 6));
++currQuadBytes;
// Second byte gets output below:
} else { // 3 bytes; no need to worry about surrogates here
currQuad = (currQuad << 8) | (0xe0 | (ch >> 12));
++currQuadBytes;
// need room for middle byte?
if (currQuadBytes >= 4) {
if (qlen >= quads.length) {
_quadBuffer = quads = growArrayBy(quads, quads.length);
}
quads[qlen++] = currQuad;
currQuad = 0;
currQuadBytes = 0;
}
currQuad = (currQuad << 8) | (0x80 | ((ch >> 6) & 0x3f));
++currQuadBytes;
}
// And same last byte in both cases, gets output below:
ch = 0x80 | (ch & 0x3f);
}
}
// Ok, we have one more byte to add at any rate:
if (currQuadBytes < 4) {
++currQuadBytes;
currQuad = (currQuad << 8) | ch;
} else {
if (qlen >= quads.length) {
_quadBuffer = quads = growArrayBy(quads, quads.length);
}
quads[qlen++] = currQuad;
currQuad = ch;
currQuadBytes = 1;
}
if (_inputPtr >= _inputEnd) {
if (!loadMore()) {
_reportInvalidEOF(" in field name");
}
}
ch = _inputBuffer[_inputPtr++] & 0xFF;
}
if (currQuadBytes > 0) {
if (qlen >= quads.length) {
_quadBuffer = quads = growArrayBy(quads, quads.length);
}
quads[qlen++] = currQuad;
}
Name name = _symbols.findName(quads, qlen);
if (name == null) {
name = addName(quads, qlen, currQuadBytes);
}
return name;
}
/**
* Method called when we see non-white space character other
* than double quote, when expecting a field name.
* In standard mode will just throw an expection; but
* in non-standard modes may be able to parse name.
*/
protected Name _handleOddName(int ch) throws IOException
{
// [JACKSON-173]: allow single quotes
if (ch == '\'' && isEnabled(Feature.ALLOW_SINGLE_QUOTES)) {
return _parseAposName();
}
// [JACKSON-69]: allow unquoted names if feature enabled:
if (!isEnabled(Feature.ALLOW_UNQUOTED_FIELD_NAMES)) {
_reportUnexpectedChar(ch, "was expecting double-quote to start field name");
}
/* Also: note that although we use a different table here,
* it does NOT handle UTF-8 decoding. It'll just pass those
* high-bit codes as acceptable for later decoding.
*/
final int[] codes = CharTypes.getInputCodeUtf8JsNames();
// Also: must start with a valid character...
if (codes[ch] != 0) {
_reportUnexpectedChar(ch, "was expecting either valid name character (for unquoted name) or double-quote (for quoted) to start field name");
}
/* Ok, now; instead of ultra-optimizing parsing here (as with
* regular JSON names), let's just use the generic "slow"
* variant. Can measure its impact later on if need be
*/
int[] quads = _quadBuffer;
int qlen = 0;
int currQuad = 0;
int currQuadBytes = 0;
while (true) {
// Ok, we have one more byte to add at any rate:
if (currQuadBytes < 4) {
++currQuadBytes;
currQuad = (currQuad << 8) | ch;
} else {
if (qlen >= quads.length) {
_quadBuffer = quads = growArrayBy(quads, quads.length);
}
quads[qlen++] = currQuad;
currQuad = ch;
currQuadBytes = 1;
}
if (_inputPtr >= _inputEnd) {
if (!loadMore()) {
_reportInvalidEOF(" in field name");
}
}
ch = _inputBuffer[_inputPtr] & 0xFF;
if (codes[ch] != 0) {
break;
}
++_inputPtr;
}
if (currQuadBytes > 0) {
if (qlen >= quads.length) {
_quadBuffer = quads = growArrayBy(quads, quads.length);
}
quads[qlen++] = currQuad;
}
Name name = _symbols.findName(quads, qlen);
if (name == null) {
name = addName(quads, qlen, currQuadBytes);
}
return name;
}
/* Parsing to support [JACKSON-173]. Plenty of duplicated code;
* main reason being to try to avoid slowing down fast path
* for valid JSON -- more alternatives, more code, generally
* bit slower execution.
*/
protected Name _parseAposName() throws IOException
{
if (_inputPtr >= _inputEnd) {
if (!loadMore()) {
_reportInvalidEOF(": was expecting closing '\'' for name");
}
}
int ch = _inputBuffer[_inputPtr++] & 0xFF;
if (ch == '\'') { // special case, ''
return BytesToNameCanonicalizer.getEmptyName();
}
int[] quads = _quadBuffer;
int qlen = 0;
int currQuad = 0;
int currQuadBytes = 0;
// Copied from parseEscapedFieldName, with minor mods:
final int[] codes = _icLatin1;
while (true) {
if (ch == '\'') {
break;
}
// additional check to skip handling of double-quotes
if (ch != '"' && codes[ch] != 0) {
if (ch != '\\') {
// Unquoted white space?
// As per [JACKSON-208], call can now return:
_throwUnquotedSpace(ch, "name");
} else {
// Nope, escape sequence
ch = _decodeEscaped();
}
/* Oh crap. May need to UTF-8 (re-)encode it, if it's
* beyond 7-bit ascii. Gets pretty messy.
* If this happens often, may want to use different name
* canonicalization to avoid these hits.
*/
if (ch > 127) {
// Ok, we'll need room for first byte right away
if (currQuadBytes >= 4) {
if (qlen >= quads.length) {
_quadBuffer = quads = growArrayBy(quads, quads.length);
}
quads[qlen++] = currQuad;
currQuad = 0;
currQuadBytes = 0;
}
if (ch < 0x800) { // 2-byte
currQuad = (currQuad << 8) | (0xc0 | (ch >> 6));
++currQuadBytes;
// Second byte gets output below:
} else { // 3 bytes; no need to worry about surrogates here
currQuad = (currQuad << 8) | (0xe0 | (ch >> 12));
++currQuadBytes;
// need room for middle byte?
if (currQuadBytes >= 4) {
if (qlen >= quads.length) {
_quadBuffer = quads = growArrayBy(quads, quads.length);
}
quads[qlen++] = currQuad;
currQuad = 0;
currQuadBytes = 0;
}
currQuad = (currQuad << 8) | (0x80 | ((ch >> 6) & 0x3f));
++currQuadBytes;
}
// And same last byte in both cases, gets output below:
ch = 0x80 | (ch & 0x3f);
}
}
// Ok, we have one more byte to add at any rate:
if (currQuadBytes < 4) {
++currQuadBytes;
currQuad = (currQuad << 8) | ch;
} else {
if (qlen >= quads.length) {
_quadBuffer = quads = growArrayBy(quads, quads.length);
}
quads[qlen++] = currQuad;
currQuad = ch;
currQuadBytes = 1;
}
if (_inputPtr >= _inputEnd) {
if (!loadMore()) {
_reportInvalidEOF(" in field name");
}
}
ch = _inputBuffer[_inputPtr++] & 0xFF;
}
if (currQuadBytes > 0) {
if (qlen >= quads.length) {
_quadBuffer = quads = growArrayBy(quads, quads.length);
}
quads[qlen++] = currQuad;
}
Name name = _symbols.findName(quads, qlen);
if (name == null) {
name = addName(quads, qlen, currQuadBytes);
}
return name;
}
/*
/**********************************************************
/* Internal methods, symbol (name) handling
/**********************************************************
*/
private final Name findName(int q1, int lastQuadBytes)
throws JsonParseException
{
// Usually we'll find it from the canonical symbol table already
Name name = _symbols.findName(q1);
if (name != null) {
return name;
}
// If not, more work. We'll need add stuff to buffer
_quadBuffer[0] = q1;
return addName(_quadBuffer, 1, lastQuadBytes);
}
private final Name findName(int q1, int q2, int lastQuadBytes)
throws JsonParseException
{
// Usually we'll find it from the canonical symbol table already
Name name = _symbols.findName(q1, q2);
if (name != null) {
return name;
}
// If not, more work. We'll need add stuff to buffer
_quadBuffer[0] = q1;
_quadBuffer[1] = q2;
return addName(_quadBuffer, 2, lastQuadBytes);
}
private final Name findName(int[] quads, int qlen, int lastQuad, int lastQuadBytes)
throws JsonParseException
{
if (qlen >= quads.length) {
_quadBuffer = quads = growArrayBy(quads, quads.length);
}
quads[qlen++] = lastQuad;
Name name = _symbols.findName(quads, qlen);
if (name == null) {
return addName(quads, qlen, lastQuadBytes);
}
return name;
}
/**
* This is the main workhorse method used when we take a symbol
* table miss. It needs to demultiplex individual bytes, decode
* multi-byte chars (if any), and then construct Name instance
* and add it to the symbol table.
*/
private final Name addName(int[] quads, int qlen, int lastQuadBytes)
throws JsonParseException
{
/* Ok: must decode UTF-8 chars. No other validation is
* needed, since unescaping has been done earlier as necessary
* (as well as error reporting for unescaped control chars)
*/
// 4 bytes per quad, except last one maybe less
int byteLen = (qlen << 2) - 4 + lastQuadBytes;
/* And last one is not correctly aligned (leading zero bytes instead
* need to shift a bit, instead of trailing). Only need to shift it
* for UTF-8 decoding; need revert for storage (since key will not
* be aligned, to optimize lookup speed)
*/
int lastQuad;
if (lastQuadBytes < 4) {
lastQuad = quads[qlen-1];
// 8/16/24 bit left shift
quads[qlen-1] = (lastQuad << ((4 - lastQuadBytes) << 3));
} else {
lastQuad = 0;
}
// Need some working space, TextBuffer works well:
char[] cbuf = _textBuffer.emptyAndGetCurrentSegment();
int cix = 0;
for (int ix = 0; ix < byteLen; ) {
int ch = quads[ix >> 2]; // current quad, need to shift+mask
int byteIx = (ix & 3);
ch = (ch >> ((3 - byteIx) << 3)) & 0xFF;
++ix;
if (ch > 127) { // multi-byte
int needed;
if ((ch & 0xE0) == 0xC0) { // 2 bytes (0x0080 - 0x07FF)
ch &= 0x1F;
needed = 1;
} else if ((ch & 0xF0) == 0xE0) { // 3 bytes (0x0800 - 0xFFFF)
ch &= 0x0F;
needed = 2;
} else if ((ch & 0xF8) == 0xF0) { // 4 bytes; double-char with surrogates and all...
ch &= 0x07;
needed = 3;
} else { // 5- and 6-byte chars not valid xml chars
_reportInvalidInitial(ch);
needed = ch = 1; // never really gets this far
}
if ((ix + needed) > byteLen) {
_reportInvalidEOF(" in field name");
}
// Ok, always need at least one more:
int ch2 = quads[ix >> 2]; // current quad, need to shift+mask
byteIx = (ix & 3);
ch2 = (ch2 >> ((3 - byteIx) << 3));
++ix;
if ((ch2 & 0xC0) != 0x080) {
_reportInvalidOther(ch2);
}
ch = (ch << 6) | (ch2 & 0x3F);
if (needed > 1) {
ch2 = quads[ix >> 2];
byteIx = (ix & 3);
ch2 = (ch2 >> ((3 - byteIx) << 3));
++ix;
if ((ch2 & 0xC0) != 0x080) {
_reportInvalidOther(ch2);
}
ch = (ch << 6) | (ch2 & 0x3F);
if (needed > 2) { // 4 bytes? (need surrogates on output)
ch2 = quads[ix >> 2];
byteIx = (ix & 3);
ch2 = (ch2 >> ((3 - byteIx) << 3));
++ix;
if ((ch2 & 0xC0) != 0x080) {
_reportInvalidOther(ch2 & 0xFF);
}
ch = (ch << 6) | (ch2 & 0x3F);
}
}
if (needed > 2) { // surrogate pair? once again, let's output one here, one later on
ch -= 0x10000; // to normalize it starting with 0x0
if (cix >= cbuf.length) {
cbuf = _textBuffer.expandCurrentSegment();
}
cbuf[cix++] = (char) (0xD800 + (ch >> 10));
ch = 0xDC00 | (ch & 0x03FF);
}
}
if (cix >= cbuf.length) {
cbuf = _textBuffer.expandCurrentSegment();
}
cbuf[cix++] = (char) ch;
}
// Ok. Now we have the character array, and can construct the String
String baseName = new String(cbuf, 0, cix);
// And finally, un-align if necessary
if (lastQuadBytes < 4) {
quads[qlen-1] = lastQuad;
}
return _symbols.addName(baseName, quads, qlen);
}
/*
/**********************************************************
/* Internal methods, String value parsing
/**********************************************************
*/
@Override
protected void _finishString() throws IOException
{
// First, single tight loop for ASCII content, not split across input buffer boundary:
int ptr = _inputPtr;
if (ptr >= _inputEnd) {
loadMoreGuaranteed();
ptr = _inputPtr;
}
int outPtr = 0;
char[] outBuf = _textBuffer.emptyAndGetCurrentSegment();
final int[] codes = _icUTF8;
final int max = Math.min(_inputEnd, (ptr + outBuf.length));
final byte[] inputBuffer = _inputBuffer;
while (ptr < max) {
int c = (int) inputBuffer[ptr] & 0xFF;
if (codes[c] != 0) {
if (c == INT_QUOTE) {
_inputPtr = ptr+1;
_textBuffer.setCurrentLength(outPtr);
return;
}
break;
}
++ptr;
outBuf[outPtr++] = (char) c;
}
_inputPtr = ptr;
_finishString2(outBuf, outPtr);
}
private final void _finishString2(char[] outBuf, int outPtr)
throws IOException
{
int c;
// Here we do want to do full decoding, hence:
final int[] codes = _icUTF8;
final byte[] inputBuffer = _inputBuffer;
main_loop:
while (true) {
// Then the tight ASCII non-funny-char loop:
ascii_loop:
while (true) {
int ptr = _inputPtr;
if (ptr >= _inputEnd) {
loadMoreGuaranteed();
ptr = _inputPtr;
}
if (outPtr >= outBuf.length) {
outBuf = _textBuffer.finishCurrentSegment();
outPtr = 0;
}
final int max = Math.min(_inputEnd, (ptr + (outBuf.length - outPtr)));
while (ptr < max) {
c = (int) inputBuffer[ptr++] & 0xFF;
if (codes[c] != 0) {
_inputPtr = ptr;
break ascii_loop;
}
outBuf[outPtr++] = (char) c;
}
_inputPtr = ptr;
}
// Ok: end marker, escape or multi-byte?
if (c == INT_QUOTE) {
break main_loop;
}
switch (codes[c]) {
case 1: // backslash
c = _decodeEscaped();
break;
case 2: // 2-byte UTF
c = _decodeUtf8_2(c);
break;
case 3: // 3-byte UTF
if ((_inputEnd - _inputPtr) >= 2) {
c = _decodeUtf8_3fast(c);
} else {
c = _decodeUtf8_3(c);
}
break;
case 4: // 4-byte UTF
c = _decodeUtf8_4(c);
// Let's add first part right away:
outBuf[outPtr++] = (char) (0xD800 | (c >> 10));
if (outPtr >= outBuf.length) {
outBuf = _textBuffer.finishCurrentSegment();
outPtr = 0;
}
c = 0xDC00 | (c & 0x3FF);
// And let the other char output down below
break;
default:
if (c < INT_SPACE) {
// As per [JACKSON-208], call can now return:
_throwUnquotedSpace(c, "string value");
} else {
// Is this good enough error message?
_reportInvalidChar(c);
}
}
// Need more room?
if (outPtr >= outBuf.length) {
outBuf = _textBuffer.finishCurrentSegment();
outPtr = 0;
}
// Ok, let's add char to output:
outBuf[outPtr++] = (char) c;
}
_textBuffer.setCurrentLength(outPtr);
}
/**
* Method called to skim through rest of unparsed String value,
* if it is not needed. This can be done bit faster if contents
* need not be stored for future access.
*/
protected void _skipString() throws IOException
{
_tokenIncomplete = false;
// Need to be fully UTF-8 aware here:
final int[] codes = _icUTF8;
final byte[] inputBuffer = _inputBuffer;
main_loop:
while (true) {
int c;
ascii_loop:
while (true) {
int ptr = _inputPtr;
int max = _inputEnd;
if (ptr >= max) {
loadMoreGuaranteed();
ptr = _inputPtr;
max = _inputEnd;
}
while (ptr < max) {
c = (int) inputBuffer[ptr++] & 0xFF;
if (codes[c] != 0) {
_inputPtr = ptr;
break ascii_loop;
}
}
_inputPtr = ptr;
}
// Ok: end marker, escape or multi-byte?
if (c == INT_QUOTE) {
break main_loop;
}
switch (codes[c]) {
case 1: // backslash
_decodeEscaped();
break;
case 2: // 2-byte UTF
_skipUtf8_2(c);
break;
case 3: // 3-byte UTF
_skipUtf8_3(c);
break;
case 4: // 4-byte UTF
_skipUtf8_4(c);
break;
default:
if (c < INT_SPACE) {
// As per [JACKSON-208], call can now return:
_throwUnquotedSpace(c, "string value");
} else {
// Is this good enough error message?
_reportInvalidChar(c);
}
}
}
}
/**
* Method for handling cases where first non-space character
* of an expected value token is not legal for standard JSON content.
*/
protected JsonToken _handleUnexpectedValue(int c)
throws IOException
{
// Most likely an error, unless we are to allow single-quote-strings
switch (c) {
case '\'':
if (isEnabled(Feature.ALLOW_SINGLE_QUOTES)) {
return _handleApos();
}
break;
case 'N':
_matchToken("NaN", 1);
if (isEnabled(Feature.ALLOW_NON_NUMERIC_NUMBERS)) {
return resetAsNaN("NaN", Double.NaN);
}
_reportError("Non-standard token 'NaN': enable JsonParser.Feature.ALLOW_NON_NUMERIC_NUMBERS to allow");
break;
case 'I':
_matchToken("Infinity", 1);
if (isEnabled(Feature.ALLOW_NON_NUMERIC_NUMBERS)) {
return resetAsNaN("Infinity", Double.POSITIVE_INFINITY);
}
_reportError("Non-standard token 'Infinity': enable JsonParser.Feature.ALLOW_NON_NUMERIC_NUMBERS to allow");
break;
case '+': // note: '-' is taken as number
if (_inputPtr >= _inputEnd) {
if (!loadMore()) {
_reportInvalidEOFInValue();
}
}
return _handleInvalidNumberStart(_inputBuffer[_inputPtr++] & 0xFF, false);
}
// [Issue#77] Try to decode most likely token
if (Character.isJavaIdentifierStart(c)) {
_reportInvalidToken(""+((char) c), "('true', 'false' or 'null')");
}
// but if it doesn't look like a token:
_reportUnexpectedChar(c, "expected a valid value (number, String, array, object, 'true', 'false' or 'null')");
return null;
}
protected JsonToken _handleApos()
throws IOException
{
int c = 0;
// Otherwise almost verbatim copy of _finishString()
int outPtr = 0;
char[] outBuf = _textBuffer.emptyAndGetCurrentSegment();
// Here we do want to do full decoding, hence:
final int[] codes = _icUTF8;
final byte[] inputBuffer = _inputBuffer;
main_loop:
while (true) {
// Then the tight ascii non-funny-char loop:
ascii_loop:
while (true) {
if (_inputPtr >= _inputEnd) {
loadMoreGuaranteed();
}
if (outPtr >= outBuf.length) {
outBuf = _textBuffer.finishCurrentSegment();
outPtr = 0;
}
int max = _inputEnd;
{
int max2 = _inputPtr + (outBuf.length - outPtr);
if (max2 < max) {
max = max2;
}
}
while (_inputPtr < max) {
c = (int) inputBuffer[_inputPtr++] & 0xFF;
if (c == '\'' || codes[c] != 0) {
break ascii_loop;
}
outBuf[outPtr++] = (char) c;
}
}
// Ok: end marker, escape or multi-byte?
if (c == '\'') {
break main_loop;
}
switch (codes[c]) {
case 1: // backslash
if (c != '\'') { // marked as special, isn't here
c = _decodeEscaped();
}
break;
case 2: // 2-byte UTF
c = _decodeUtf8_2(c);
break;
case 3: // 3-byte UTF
if ((_inputEnd - _inputPtr) >= 2) {
c = _decodeUtf8_3fast(c);
} else {
c = _decodeUtf8_3(c);
}
break;
case 4: // 4-byte UTF
c = _decodeUtf8_4(c);
// Let's add first part right away:
outBuf[outPtr++] = (char) (0xD800 | (c >> 10));
if (outPtr >= outBuf.length) {
outBuf = _textBuffer.finishCurrentSegment();
outPtr = 0;
}
c = 0xDC00 | (c & 0x3FF);
// And let the other char output down below
break;
default:
if (c < INT_SPACE) {
_throwUnquotedSpace(c, "string value");
}
// Is this good enough error message?
_reportInvalidChar(c);
}
// Need more room?
if (outPtr >= outBuf.length) {
outBuf = _textBuffer.finishCurrentSegment();
outPtr = 0;
}
// Ok, let's add char to output:
outBuf[outPtr++] = (char) c;
}
_textBuffer.setCurrentLength(outPtr);
return JsonToken.VALUE_STRING;
}
/**
* Method called if expected numeric value (due to leading sign) does not
* look like a number
*/
protected JsonToken _handleInvalidNumberStart(int ch, boolean neg)
throws IOException
{
while (ch == 'I') {
if (_inputPtr >= _inputEnd) {
if (!loadMore()) {
_reportInvalidEOFInValue();
}
}
ch = _inputBuffer[_inputPtr++];
String match;
if (ch == 'N') {
match = neg ? "-INF" :"+INF";
} else if (ch == 'n') {
match = neg ? "-Infinity" :"+Infinity";
} else {
break;
}
_matchToken(match, 3);
if (isEnabled(Feature.ALLOW_NON_NUMERIC_NUMBERS)) {
return resetAsNaN(match, neg ? Double.NEGATIVE_INFINITY : Double.POSITIVE_INFINITY);
}
_reportError("Non-standard token '"+match+"': enable JsonParser.Feature.ALLOW_NON_NUMERIC_NUMBERS to allow");
}
reportUnexpectedNumberChar(ch, "expected digit (0-9) to follow minus sign, for valid numeric value");
return null;
}
protected void _matchToken(String matchStr, int i)
throws IOException
{
final int len = matchStr.length();
do {
if (((_inputPtr >= _inputEnd) && !loadMore())
|| (_inputBuffer[_inputPtr] != matchStr.charAt(i))) {
_reportInvalidToken(matchStr.substring(0, i));
}
++_inputPtr;
} while (++i < len);
// but let's also ensure we either get EOF, or non-alphanum char...
if (_inputPtr >= _inputEnd && !loadMore()) {
return;
}
int ch = _inputBuffer[_inputPtr] & 0xFF;
if (ch < '0' || ch == ']' || ch == '}') { // expected/allowed chars
return;
}
// but actually only alphanums are problematic
char c = (char) _decodeCharForError(ch);
if (Character.isJavaIdentifierPart(c)) {
_reportInvalidToken(matchStr.substring(0, i));
}
}
/*
/**********************************************************
/* Internal methods, ws skipping, escape/unescape
/**********************************************************
*/
private final int _skipWS() throws IOException
{
final int[] codes = _icWS;
while (_inputPtr < _inputEnd || loadMore()) {
final int i = _inputBuffer[_inputPtr++] & 0xFF;
switch (codes[i]) {
case 0: // done!
return i;
case 1: // skip
continue;
case 2: // 2-byte UTF
_skipUtf8_2(i);
break;
case 3: // 3-byte UTF
_skipUtf8_3(i);
break;
case 4: // 4-byte UTF
_skipUtf8_4(i);
break;
case INT_LF:
++_currInputRow;
_currInputRowStart = _inputPtr;
break;
case INT_CR:
_skipCR();
break;
case '/':
_skipComment();
break;
case '#':
if (!_skipYAMLComment()) {
return i;
}
break;
default: // e.g. -1
// Is this good enough error message?
if (i < 32) {
_throwInvalidSpace(i);
}
_reportInvalidChar(i);
}
}
throw _constructError("Unexpected end-of-input within/between "+_parsingContext.getTypeDesc()+" entries");
}
private final int _skipWSOrEnd() throws IOException
{
final int[] codes = _icWS;
while ((_inputPtr < _inputEnd) || loadMore()) {
final int i = _inputBuffer[_inputPtr++] & 0xFF;
switch (codes[i]) {
case 0: // done!
return i;
case 1: // skip
continue;
case 2: // 2-byte UTF
_skipUtf8_2(i);
break;
case 3: // 3-byte UTF
_skipUtf8_3(i);
break;
case 4: // 4-byte UTF
_skipUtf8_4(i);
break;
case INT_LF:
++_currInputRow;
_currInputRowStart = _inputPtr;
break;
case INT_CR:
_skipCR();
break;
case '/':
_skipComment();
break;
case '#':
if (!_skipYAMLComment()) {
return i;
}
break;
default: // e.g. -1
_reportInvalidChar(i);
}
}
// We ran out of input...
_handleEOF();
return -1;
}
/**
* Helper method for matching and skipping a colon character,
* optionally surrounded by white space
*/
private final int _skipColon() throws IOException
{
if (_inputPtr >= _inputEnd) {
loadMoreGuaranteed();
}
// first fast case: we just got a colon without white space:
int i = _inputBuffer[_inputPtr++];
if (i == INT_COLON) {
if (_inputPtr < _inputEnd) {
i = _inputBuffer[_inputPtr] & 0xFF;
if (i > INT_SPACE && i != INT_SLASH) {
++_inputPtr;
return i;
}
}
} else {
// need to skip potential leading space
i &= 0xFF;
space_loop:
while (true) {
switch (i) {
case ' ':
case '\t':
break;
case INT_CR:
_skipCR();
break;
case INT_LF:
++_currInputRow;
_currInputRowStart = _inputPtr;
break;
case '/':
_skipComment();
break;
default:
if (i < INT_SPACE) {
_throwInvalidSpace(i);
}
break space_loop;
}
if (_inputPtr >= _inputEnd) {
loadMoreGuaranteed();
}
i = _inputBuffer[_inputPtr++] & 0xFF;
}
if (i != INT_COLON) {
_reportUnexpectedChar(i, "was expecting a colon to separate field name and value");
}
}
// either way, found colon, skip through trailing WS
while (_inputPtr < _inputEnd || loadMore()) {
i = _inputBuffer[_inputPtr++] & 0xFF;
if (i > INT_SPACE) {
if (i != INT_SLASH) {
return i;
}
_skipComment();
} else if (i != INT_SPACE) {
if (i == INT_LF) {
++_currInputRow;
_currInputRowStart = _inputPtr;
} else if (i == INT_CR) {
_skipCR();
} else if (i != INT_TAB) {
_throwInvalidSpace(i);
}
}
}
throw _constructError("Unexpected end-of-input within/between "+_parsingContext.getTypeDesc()+" entries");
}
private final void _skipComment() throws IOException
{
if (!isEnabled(Feature.ALLOW_COMMENTS)) {
_reportUnexpectedChar('/', "maybe a (non-standard) comment? (not recognized as one since Feature 'ALLOW_COMMENTS' not enabled for parser)");
}
// First: check which comment (if either) it is:
if (_inputPtr >= _inputEnd && !loadMore()) {
_reportInvalidEOF(" in a comment");
}
int c = _inputBuffer[_inputPtr++] & 0xFF;
if (c == '/') {
_skipLine();
} else if (c == '*') {
_skipCComment();
} else {
_reportUnexpectedChar(c, "was expecting either '*' or '/' for a comment");
}
}
private final void _skipCComment() throws IOException
{
// Need to be UTF-8 aware here to decode content (for skipping)
final int[] codes = CharTypes.getInputCodeComment();
// Ok: need the matching '*/'
main_loop:
while ((_inputPtr < _inputEnd) || loadMore()) {
int i = (int) _inputBuffer[_inputPtr++] & 0xFF;
int code = codes[i];
if (code != 0) {
switch (code) {
case '*':
if (_inputPtr >= _inputEnd && !loadMore()) {
break main_loop;
}
if (_inputBuffer[_inputPtr] == INT_SLASH) {
++_inputPtr;
return;
}
break;
case INT_LF:
++_currInputRow;
_currInputRowStart = _inputPtr;
break;
case INT_CR:
_skipCR();
break;
case 2: // 2-byte UTF
_skipUtf8_2(i);
break;
case 3: // 3-byte UTF
_skipUtf8_3(i);
break;
case 4: // 4-byte UTF
_skipUtf8_4(i);
break;
default: // e.g. -1
// Is this good enough error message?
_reportInvalidChar(i);
}
}
}
_reportInvalidEOF(" in a comment");
}
private final boolean _skipYAMLComment() throws IOException
{
if (!isEnabled(Feature.ALLOW_YAML_COMMENTS)) {
return false;
}
_skipLine();
return true;
}
/**
* Method for skipping contents of an input line; usually for CPP
* and YAML style comments.
*/
private final void _skipLine() throws IOException
{
// Ok: need to find EOF or linefeed
final int[] codes = CharTypes.getInputCodeComment();
while ((_inputPtr < _inputEnd) || loadMore()) {
int i = (int) _inputBuffer[_inputPtr++] & 0xFF;
int code = codes[i];
if (code != 0) {
switch (code) {
case INT_LF:
++_currInputRow;
_currInputRowStart = _inputPtr;
return;
case INT_CR:
_skipCR();
return;
case '*': // nop for these comments
break;
case 2: // 2-byte UTF
_skipUtf8_2(i);
break;
case 3: // 3-byte UTF
_skipUtf8_3(i);
break;
case 4: // 4-byte UTF
_skipUtf8_4(i);
break;
default: // e.g. -1
if (code < 0) {
// Is this good enough error message?
_reportInvalidChar(i);
}
}
}
}
}
@Override
protected char _decodeEscaped() throws IOException
{
if (_inputPtr >= _inputEnd) {
if (!loadMore()) {
_reportInvalidEOF(" in character escape sequence");
}
}
int c = (int) _inputBuffer[_inputPtr++];
switch ((int) c) {
// First, ones that are mapped
case 'b':
return '\b';
case 't':
return '\t';
case 'n':
return '\n';
case 'f':
return '\f';
case 'r':
return '\r';
// And these are to be returned as they are
case '"':
case '/':
case '\\':
return (char) c;
case 'u': // and finally hex-escaped
break;
default:
return _handleUnrecognizedCharacterEscape((char) _decodeCharForError(c));
}
// Ok, a hex escape. Need 4 characters
int value = 0;
for (int i = 0; i < 4; ++i) {
if (_inputPtr >= _inputEnd) {
if (!loadMore()) {
_reportInvalidEOF(" in character escape sequence");
}
}
int ch = (int) _inputBuffer[_inputPtr++];
int digit = CharTypes.charToHex(ch);
if (digit < 0) {
_reportUnexpectedChar(ch, "expected a hex-digit for character escape sequence");
}
value = (value << 4) | digit;
}
return (char) value;
}
protected int _decodeCharForError(int firstByte) throws IOException
{
int c = (int) firstByte;
if (c < 0) { // if >= 0, is ascii and fine as is
int needed;
// Ok; if we end here, we got multi-byte combination
if ((c & 0xE0) == 0xC0) { // 2 bytes (0x0080 - 0x07FF)
c &= 0x1F;
needed = 1;
} else if ((c & 0xF0) == 0xE0) { // 3 bytes (0x0800 - 0xFFFF)
c &= 0x0F;
needed = 2;
} else if ((c & 0xF8) == 0xF0) {
// 4 bytes; double-char with surrogates and all...
c &= 0x07;
needed = 3;
} else {
_reportInvalidInitial(c & 0xFF);
needed = 1; // never gets here
}
int d = nextByte();
if ((d & 0xC0) != 0x080) {
_reportInvalidOther(d & 0xFF);
}
c = (c << 6) | (d & 0x3F);
if (needed > 1) { // needed == 1 means 2 bytes total
d = nextByte(); // 3rd byte
if ((d & 0xC0) != 0x080) {
_reportInvalidOther(d & 0xFF);
}
c = (c << 6) | (d & 0x3F);
if (needed > 2) { // 4 bytes? (need surrogates)
d = nextByte();
if ((d & 0xC0) != 0x080) {
_reportInvalidOther(d & 0xFF);
}
c = (c << 6) | (d & 0x3F);
}
}
}
return c;
}
/*
/**********************************************************
/* Internal methods,UTF8 decoding
/**********************************************************
*/
private final int _decodeUtf8_2(int c) throws IOException
{
if (_inputPtr >= _inputEnd) {
loadMoreGuaranteed();
}
int d = (int) _inputBuffer[_inputPtr++];
if ((d & 0xC0) != 0x080) {
_reportInvalidOther(d & 0xFF, _inputPtr);
}
return ((c & 0x1F) << 6) | (d & 0x3F);
}
private final int _decodeUtf8_3(int c1) throws IOException
{
if (_inputPtr >= _inputEnd) {
loadMoreGuaranteed();
}
c1 &= 0x0F;
int d = (int) _inputBuffer[_inputPtr++];
if ((d & 0xC0) != 0x080) {
_reportInvalidOther(d & 0xFF, _inputPtr);
}
int c = (c1 << 6) | (d & 0x3F);
if (_inputPtr >= _inputEnd) {
loadMoreGuaranteed();
}
d = (int) _inputBuffer[_inputPtr++];
if ((d & 0xC0) != 0x080) {
_reportInvalidOther(d & 0xFF, _inputPtr);
}
c = (c << 6) | (d & 0x3F);
return c;
}
private final int _decodeUtf8_3fast(int c1) throws IOException
{
c1 &= 0x0F;
int d = (int) _inputBuffer[_inputPtr++];
if ((d & 0xC0) != 0x080) {
_reportInvalidOther(d & 0xFF, _inputPtr);
}
int c = (c1 << 6) | (d & 0x3F);
d = (int) _inputBuffer[_inputPtr++];
if ((d & 0xC0) != 0x080) {
_reportInvalidOther(d & 0xFF, _inputPtr);
}
c = (c << 6) | (d & 0x3F);
return c;
}
/**
* @return Character value minus 0x10000; this so that caller
* can readily expand it to actual surrogates
*/
private final int _decodeUtf8_4(int c) throws IOException
{
if (_inputPtr >= _inputEnd) {
loadMoreGuaranteed();
}
int d = (int) _inputBuffer[_inputPtr++];
if ((d & 0xC0) != 0x080) {
_reportInvalidOther(d & 0xFF, _inputPtr);
}
c = ((c & 0x07) << 6) | (d & 0x3F);
if (_inputPtr >= _inputEnd) {
loadMoreGuaranteed();
}
d = (int) _inputBuffer[_inputPtr++];
if ((d & 0xC0) != 0x080) {
_reportInvalidOther(d & 0xFF, _inputPtr);
}
c = (c << 6) | (d & 0x3F);
if (_inputPtr >= _inputEnd) {
loadMoreGuaranteed();
}
d = (int) _inputBuffer[_inputPtr++];
if ((d & 0xC0) != 0x080) {
_reportInvalidOther(d & 0xFF, _inputPtr);
}
/* note: won't change it to negative here, since caller
* already knows it'll need a surrogate
*/
return ((c << 6) | (d & 0x3F)) - 0x10000;
}
private final void _skipUtf8_2(int c) throws IOException
{
if (_inputPtr >= _inputEnd) {
loadMoreGuaranteed();
}
c = (int) _inputBuffer[_inputPtr++];
if ((c & 0xC0) != 0x080) {
_reportInvalidOther(c & 0xFF, _inputPtr);
}
}
/* Alas, can't heavily optimize skipping, since we still have to
* do validity checks...
*/
private final void _skipUtf8_3(int c) throws IOException
{
if (_inputPtr >= _inputEnd) {
loadMoreGuaranteed();
}
//c &= 0x0F;
c = (int) _inputBuffer[_inputPtr++];
if ((c & 0xC0) != 0x080) {
_reportInvalidOther(c & 0xFF, _inputPtr);
}
if (_inputPtr >= _inputEnd) {
loadMoreGuaranteed();
}
c = (int) _inputBuffer[_inputPtr++];
if ((c & 0xC0) != 0x080) {
_reportInvalidOther(c & 0xFF, _inputPtr);
}
}
private final void _skipUtf8_4(int c) throws IOException
{
if (_inputPtr >= _inputEnd) {
loadMoreGuaranteed();
}
int d = (int) _inputBuffer[_inputPtr++];
if ((d & 0xC0) != 0x080) {
_reportInvalidOther(d & 0xFF, _inputPtr);
}
if (_inputPtr >= _inputEnd) {
loadMoreGuaranteed();
}
d = (int) _inputBuffer[_inputPtr++];
if ((d & 0xC0) != 0x080) {
_reportInvalidOther(d & 0xFF, _inputPtr);
}
if (_inputPtr >= _inputEnd) {
loadMoreGuaranteed();
}
d = (int) _inputBuffer[_inputPtr++];
if ((d & 0xC0) != 0x080) {
_reportInvalidOther(d & 0xFF, _inputPtr);
}
}
/*
/**********************************************************
/* Internal methods, input loading
/**********************************************************
*/
/**
* We actually need to check the character value here
* (to see if we have \n following \r).
*/
protected final void _skipCR() throws IOException
{
if (_inputPtr < _inputEnd || loadMore()) {
if (_inputBuffer[_inputPtr] == BYTE_LF) {
++_inputPtr;
}
}
++_currInputRow;
_currInputRowStart = _inputPtr;
}
private int nextByte() throws IOException
{
if (_inputPtr >= _inputEnd) {
loadMoreGuaranteed();
}
return _inputBuffer[_inputPtr++] & 0xFF;
}
/*
/**********************************************************
/* Internal methods, error reporting
/**********************************************************
*/
protected void _reportInvalidToken(String matchedPart) throws IOException
{
_reportInvalidToken(matchedPart, "'null', 'true', 'false' or NaN");
}
protected void _reportInvalidToken(String matchedPart, String msg) throws IOException
{
StringBuilder sb = new StringBuilder(matchedPart);
/* Let's just try to find what appears to be the token, using
* regular Java identifier character rules. It's just a heuristic,
* nothing fancy here (nor fast).
*/
while (true) {
if (_inputPtr >= _inputEnd && !loadMore()) {
break;
}
int i = (int) _inputBuffer[_inputPtr++];
char c = (char) _decodeCharForError(i);
if (!Character.isJavaIdentifierPart(c)) {
break;
}
sb.append(c);
}
_reportError("Unrecognized token '"+sb.toString()+"': was expecting "+msg);
}
protected void _reportInvalidChar(int c)
throws JsonParseException
{
// Either invalid WS or illegal UTF-8 start char
if (c < INT_SPACE) {
_throwInvalidSpace(c);
}
_reportInvalidInitial(c);
}
protected void _reportInvalidInitial(int mask)
throws JsonParseException
{
_reportError("Invalid UTF-8 start byte 0x"+Integer.toHexString(mask));
}
protected void _reportInvalidOther(int mask)
throws JsonParseException
{
_reportError("Invalid UTF-8 middle byte 0x"+Integer.toHexString(mask));
}
protected void _reportInvalidOther(int mask, int ptr)
throws JsonParseException
{
_inputPtr = ptr;
_reportInvalidOther(mask);
}
public static int[] growArrayBy(int[] arr, int more)
{
if (arr == null) {
return new int[more];
}
return ArraysCompat.copyOf(arr, arr.length + more);
}
/*
/**********************************************************
/* Binary access
/**********************************************************
*/
/**
* Efficient handling for incremental parsing of base64-encoded
* textual content.
*/
@SuppressWarnings("resource")
protected final byte[] _decodeBase64(Base64Variant b64variant) throws IOException
{
ByteArrayBuilder builder = _getByteArrayBuilder();
//main_loop:
while (true) {
// first, we'll skip preceding white space, if any
int ch;
do {
if (_inputPtr >= _inputEnd) {
loadMoreGuaranteed();
}
ch = (int) _inputBuffer[_inputPtr++] & 0xFF;
} while (ch <= INT_SPACE);
int bits = b64variant.decodeBase64Char(ch);
if (bits < 0) { // reached the end, fair and square?
if (ch == INT_QUOTE) {
return builder.toByteArray();
}
bits = _decodeBase64Escape(b64variant, ch, 0);
if (bits < 0) { // white space to skip
continue;
}
}
int decodedData = bits;
// then second base64 char; can't get padding yet, nor ws
if (_inputPtr >= _inputEnd) {
loadMoreGuaranteed();
}
ch = _inputBuffer[_inputPtr++] & 0xFF;
bits = b64variant.decodeBase64Char(ch);
if (bits < 0) {
bits = _decodeBase64Escape(b64variant, ch, 1);
}
decodedData = (decodedData << 6) | bits;
// third base64 char; can be padding, but not ws
if (_inputPtr >= _inputEnd) {
loadMoreGuaranteed();
}
ch = _inputBuffer[_inputPtr++] & 0xFF;
bits = b64variant.decodeBase64Char(ch);
// First branch: can get padding (-> 1 byte)
if (bits < 0) {
if (bits != Base64Variant.BASE64_VALUE_PADDING) {
// as per [JACKSON-631], could also just be 'missing' padding
if (ch == '"' && !b64variant.usesPadding()) {
decodedData >>= 4;
builder.append(decodedData);
return builder.toByteArray();
}
bits = _decodeBase64Escape(b64variant, ch, 2);
}
if (bits == Base64Variant.BASE64_VALUE_PADDING) {
// Ok, must get padding
if (_inputPtr >= _inputEnd) {
loadMoreGuaranteed();
}
ch = _inputBuffer[_inputPtr++] & 0xFF;
if (!b64variant.usesPaddingChar(ch)) {
throw reportInvalidBase64Char(b64variant, ch, 3, "expected padding character '"+b64variant.getPaddingChar()+"'");
}
// Got 12 bits, only need 8, need to shift
decodedData >>= 4;
builder.append(decodedData);
continue;
}
}
// Nope, 2 or 3 bytes
decodedData = (decodedData << 6) | bits;
// fourth and last base64 char; can be padding, but not ws
if (_inputPtr >= _inputEnd) {
loadMoreGuaranteed();
}
ch = _inputBuffer[_inputPtr++] & 0xFF;
bits = b64variant.decodeBase64Char(ch);
if (bits < 0) {
if (bits != Base64Variant.BASE64_VALUE_PADDING) {
// as per [JACKSON-631], could also just be 'missing' padding
if (ch == '"' && !b64variant.usesPadding()) {
decodedData >>= 2;
builder.appendTwoBytes(decodedData);
return builder.toByteArray();
}
bits = _decodeBase64Escape(b64variant, ch, 3);
}
if (bits == Base64Variant.BASE64_VALUE_PADDING) {
/* With padding we only get 2 bytes; but we have
* to shift it a bit so it is identical to triplet
* case with partial output.
* 3 chars gives 3x6 == 18 bits, of which 2 are
* dummies, need to discard:
*/
decodedData >>= 2;
builder.appendTwoBytes(decodedData);
continue;
}
}
// otherwise, our triplet is now complete
decodedData = (decodedData << 6) | bits;
builder.appendThreeBytes(decodedData);
}
}
}