package com.fasterxml.jackson.dataformat.smile;

import java.io.IOException;
import java.lang.ref.SoftReference;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.Arrays;

import com.fasterxml.jackson.core.*;
import com.fasterxml.jackson.core.base.ParserMinimalBase;
import com.fasterxml.jackson.core.io.IOContext;
import com.fasterxml.jackson.core.io.NumberInput;
import com.fasterxml.jackson.core.json.DupDetector;
import com.fasterxml.jackson.core.json.JsonReadContext;
import com.fasterxml.jackson.core.sym.ByteQuadsCanonicalizer;
import com.fasterxml.jackson.core.util.TextBuffer;

Since:
2.9/**
 * @since 2.9
 */
public abstract class SmileParserBase extends ParserMinimalBase
{
    protected final static String[] NO_STRINGS = new String[0];

    /*
    /**********************************************************
    /* Config
    /**********************************************************
     */

    
Bit flag composed of bits that indicate which Features are enabled. 
 NOTE: currently the only feature (Feature.REQUIRE_HEADER takes effect during bootstrapping. /**
     * Bit flag composed of bits that indicate which
     * {@link SmileParser.Feature}s are enabled.
     *<p>
     * NOTE: currently the only feature ({@link SmileParser.Feature#REQUIRE_HEADER}
     * takes effect during bootstrapping.
     */
    protected int _formatFeatures;

    
Flag that indicates whether content can legally have raw (unquoted)
binary data. Since this information is included both in header and
in actual binary data blocks there is redundancy, and we want to
ensure settings are compliant. Using application may also want to
know this setting in case it does some direct (random) access.
/**
     * Flag that indicates whether content can legally have raw (unquoted)
     * binary data. Since this information is included both in header and
     * in actual binary data blocks there is redundancy, and we want to
     * ensure settings are compliant. Using application may also want to
     * know this setting in case it does some direct (random) access.
     */
    protected boolean _mayContainRawBinary;

    /*
    /**********************************************************
    /* Generic I/O state
    /**********************************************************
     */

    
I/O context for this reader. It handles buffer allocation
for the reader.
/**
     * I/O context for this reader. It handles buffer allocation
     * for the reader.
     */
    final protected IOContext _ioContext;

    
Flag that indicates whether parser is closed or not. Gets set when parser is either closed by explicit call (close) or when end-of-input is reached. /**
     * Flag that indicates whether parser is closed or not. Gets
     * set when parser is either closed by explicit call
     * ({@link #close}) or when end-of-input is reached.
     */
    protected boolean _closed;

    /*
    /**********************************************************
    /* Current input data
    /**********************************************************
     */

    // Note: type of actual buffer depends on sub-class, can't include

    
Pointer to next available character in buffer
/**
     * Pointer to next available character in buffer
     */
    protected int _inputPtr = 0;

    
Index of character after last available one in the buffer.
/**
     * Index of character after last available one in the buffer.
     */
    protected int _inputEnd = 0;

    /*
    /**********************************************************
    /* Parsing state, location
    /**********************************************************
     */

    
Number of characters/bytes that were contained in previous blocks
(blocks that were already processed prior to the current buffer).
/**
     * Number of characters/bytes that were contained in previous blocks
     * (blocks that were already processed prior to the current buffer).
     */
    protected long _currInputProcessed;

    
Alternative to _tokenInputTotal that will only contain offset within input buffer, as int. /**
     * Alternative to {@link #_tokenInputTotal} that will only contain
     * offset within input buffer, as int.
     */
    protected int _tokenOffsetForTotal;

    
Information about parser context, context in which
the next token is to be parsed (root, array, object).
/**
     * Information about parser context, context in which
     * the next token is to be parsed (root, array, object).
     */
    protected JsonReadContext _parsingContext;
    
    /*
    /**********************************************************
    /* Decoded values, text, binary
    /**********************************************************
     */

    
Buffer that contains contents of String values, including
field names if necessary (name split across boundary,
contains escape sequence, or access needed to char array)
/**
     * Buffer that contains contents of String values, including
     * field names if necessary (name split across boundary,
     * contains escape sequence, or access needed to char array)
     */
    protected final TextBuffer _textBuffer;

    
Temporary buffer that is needed if field name is accessed using ParserMinimalBase.getTextCharacters method (instead of String returning alternatives) /**
     * Temporary buffer that is needed if field name is accessed
     * using {@link #getTextCharacters} method (instead of String
     * returning alternatives)
     */
    protected char[] _nameCopyBuffer;

    
Flag set to indicate whether the field name is available
from the name copy buffer or not (in addition to its String
representation  being available via read context)
/**
     * Flag set to indicate whether the field name is available
     * from the name copy buffer or not (in addition to its String
     * representation  being available via read context)
     */
    protected boolean _nameCopied;

    
We will hold on to decoded binary data, for duration of current event, so that multiple calls to JsonParser.getBinaryValue will not need to decode data more than once. /**
     * We will hold on to decoded binary data, for duration of
     * current event, so that multiple calls to
     * {@link #getBinaryValue} will not need to decode data more
     * than once.
     */
    protected byte[] _binaryValue;

    /*
    /**********************************************************
    /* Decoded values, numbers
    /**********************************************************
     */

    protected NumberType _numberType;

    
Bitfield that indicates which numeric representations
have been calculated for the current type
/**
     * Bitfield that indicates which numeric representations
     * have been calculated for the current type
     */
    protected int _numTypesValid = NR_UNKNOWN;

    protected BigInteger _numberBigInt;

    protected BigDecimal _numberBigDecimal;

    protected int _numberInt;

    protected float _numberFloat;

    protected long _numberLong;

    protected double _numberDouble;

    /*
    /**********************************************************
    /* Symbol handling, decoding
    /**********************************************************
     */

    
Symbol table that contains field names encountered so far
/**
     * Symbol table that contains field names encountered so far
     */
    final protected ByteQuadsCanonicalizer _symbols;
    
    
Temporary buffer used for name parsing.
/**
     * Temporary buffer used for name parsing.
     */
    protected int[] _quadBuffer = NO_INTS;

    
Quads used for hash calculation
/**
     * Quads used for hash calculation
     */
    protected int _quad1, _quad2, _quad3;

    
Array of recently seen field names, which may be back referenced
by later fields.
Defaults set to enable handling even if no header found.
/**
     * Array of recently seen field names, which may be back referenced
     * by later fields.
     * Defaults set to enable handling even if no header found.
     */
    protected String[] _seenNames = NO_STRINGS;

    protected int _seenNameCount = 0;

    
Array of recently seen field names, which may be back referenced
by later fields
Defaults set to disable handling if no header found.
/**
     * Array of recently seen field names, which may be back referenced
     * by later fields
     * Defaults set to disable handling if no header found.
     */
    protected String[] _seenStringValues = null;

    protected int _seenStringValueCount = -1;

    /*
    /**********************************************************
    /* Thread-local recycling
    /**********************************************************
     */
    
    
ThreadLocal contains a SoftReference to a buffer recycler used to provide a low-cost buffer recycling for Smile-specific buffers. /**
     * <code>ThreadLocal</code> contains a {@link java.lang.ref.SoftReference}
     * to a buffer recycler used to provide a low-cost
     * buffer recycling for Smile-specific buffers.
     */
    final protected static ThreadLocal<SoftReference<SmileBufferRecycler<String>>> _smileRecyclerRef
        = new ThreadLocal<SoftReference<SmileBufferRecycler<String>>>();

    
Helper object used for low-level recycling of Smile-generator
specific buffers.
/**
     * Helper object used for low-level recycling of Smile-generator
     * specific buffers.
     */
    final protected SmileBufferRecycler<String> _smileBufferRecycler;

    /*
    /**********************************************************
    /* Life-cycle
    /**********************************************************
     */

    public SmileParserBase(IOContext ctxt, int parserFeatures, int formatFeatures,
            ByteQuadsCanonicalizer sym)
    {
        super(parserFeatures);
        _formatFeatures = formatFeatures;
        _ioContext = ctxt;
        _symbols = sym;
        DupDetector dups = Feature.STRICT_DUPLICATE_DETECTION.enabledIn(parserFeatures)
                ? DupDetector.rootDetector(this) : null;
        _parsingContext = JsonReadContext.createRootContext(dups);

        _textBuffer = ctxt.constructTextBuffer();
        _smileBufferRecycler = _smileBufferRecycler();
    }

    protected final static SmileBufferRecycler<String> _smileBufferRecycler()
    {
        SoftReference<SmileBufferRecycler<String>> ref = _smileRecyclerRef.get();
        SmileBufferRecycler<String> br = (ref == null) ? null : ref.get();

        if (br == null) {
            br = new SmileBufferRecycler<String>();
            _smileRecyclerRef.set(new SoftReference<SmileBufferRecycler<String>>(br));
        }
        return br;
    }

    /*                                                                                       
    /**********************************************************                              
    /* Versioned                                                                             
    /**********************************************************                              
     */

    @Override
    public final Version version() {
        return PackageVersion.VERSION;
    }

    /*
    /**********************************************************************
    /* Extended API
    /**********************************************************************
     */

    public final boolean mayContainRawBinary() {
        return _mayContainRawBinary;
    }
    
    /*                                                                                       
    /**********************************************************                              
    /* FormatFeature support                                                                             
    /**********************************************************                              
     */

    @Override
    public final int getFormatFeatures() {
        return _formatFeatures;
    }

    @Override
    public final JsonParser overrideFormatFeatures(int values, int mask) {
        _formatFeatures = (_formatFeatures & ~mask) | (values & mask);
        return this;
    }

    /*
    /**********************************************************
    /* Abstract methods for sub-classes to provide
    /**********************************************************
     */

    protected abstract void _closeInput() throws IOException;

    protected abstract void _parseNumericValue() throws IOException;

//  public abstract int releaseBuffered(OutputStream out) throws IOException;
//  public abstract Object getInputSource();
    
    /*
    /**********************************************************
    /* Abstract impls
    /**********************************************************
     */

    
Overridden since we do not really have character-based locations,
but we do have byte offset to specify.
/**
     * Overridden since we do not really have character-based locations,
     * but we do have byte offset to specify.
     */
    @Override
    public final JsonLocation getTokenLocation()
    {
        // token location is correctly managed...
        long total = _currInputProcessed + _tokenOffsetForTotal;
        // 2.4: used to be: _tokenInputTotal
        return new JsonLocation(_ioContext.getSourceReference(),
                total, // bytes
                -1, -1, (int) total); // char offset, line, column
    }

    
Overridden since we do not really have character-based locations,
but we do have byte offset to specify.
/**
     * Overridden since we do not really have character-based locations,
     * but we do have byte offset to specify.
     */
    @Override
    public final JsonLocation getCurrentLocation()
    {
        final long offset = _currInputProcessed + _inputPtr;
        return new JsonLocation(_ioContext.getSourceReference(),
                offset, // bytes
                -1, -1, (int) offset); // char offset, line, column
    }

    
Method that can be called to get the name associated with
the current event.
/**
     * Method that can be called to get the name associated with
     * the current event.
     */
    @Override
    public final String getCurrentName() throws IOException
    {
        if (_currToken == JsonToken.START_OBJECT || _currToken == JsonToken.START_ARRAY) {
            return _parsingContext.getParent().getCurrentName();
        }
        return _parsingContext.getCurrentName();
    }

    @Override
    public final void overrideCurrentName(String name)
    {
        // Simple, but need to look for START_OBJECT/ARRAY's "off-by-one" thing:
        JsonReadContext ctxt = _parsingContext;
        if (_currToken == JsonToken.START_OBJECT || _currToken == JsonToken.START_ARRAY) {
            ctxt = ctxt.getParent();
        }
        // Unfortunate, but since we did not expose exceptions, need to wrap
        try {
            ctxt.setCurrentName(name);
        } catch (IOException e) {
            throw new IllegalStateException(e);
        }
    }

    @Override
    public final void close() throws IOException {
        if (!_closed) {
            _closed = true;
            _inputEnd = 0;
            _symbols.release();
            try {
                _closeInput();
            } finally {
                // Also, internal buffer(s) can now be released as well
                _releaseBuffers();
            }
        }
    }

    protected final void _releaseBuffers() throws IOException {
        _textBuffer.releaseBuffers();
        char[] buf = _nameCopyBuffer;
        if (buf != null) {
            _nameCopyBuffer = null;
            _ioContext.releaseNameCopyBuffer(buf);
        }
        String[] nameBuf = _seenNames;
        if (nameBuf != null && nameBuf.length > 0) {
            _seenNames = null;
            // 28-Jun-2011, tatu: With 1.9, caller needs to clear the buffer;
            //   but we only need to clear up to count as it is not a hash area
            if (_seenNameCount > 0) {
                Arrays.fill(nameBuf, 0, _seenNameCount, null);
            }
            _smileBufferRecycler.releaseSeenNamesBuffer(nameBuf);
        }
        String[] valueBuf = _seenStringValues;
        if (valueBuf != null && valueBuf.length > 0) {
            _seenStringValues = null;
            // 28-Jun-2011, tatu: With 1.9, caller needs to clear the buffer;
            //   but we only need to clear up to count as it is not a hash area
            if (_seenStringValueCount > 0) {
                Arrays.fill(valueBuf, 0, _seenStringValueCount, null);
            }
            _smileBufferRecycler.releaseSeenStringValuesBuffer(valueBuf);
        }
        _releaseBuffers2();
    }

    protected abstract void _releaseBuffers2();
    
    @Override public final boolean isClosed() { return _closed; }
    @Override public final JsonReadContext getParsingContext() { return _parsingContext; }

    /*
    /**********************************************************
    /* Numeric accessors of public API
    /**********************************************************
     */

    @Override // since 2.9
    public final boolean isNaN() throws IOException {
        if (_currToken == JsonToken.VALUE_NUMBER_FLOAT) {
            if (_numTypesValid == NR_UNKNOWN) {
                _parseNumericValue(); // will also check event type
            }
            if (_numberType == NumberType.DOUBLE) {
                // 10-Mar-2017, tatu: Alas, `Double.isFinite(d)` only added in JDK 8
                double d = _numberDouble;
                return Double.isNaN(d) || Double.isInfinite(d);
            }
            if (_numberType == NumberType.FLOAT) {
                float f = _numberFloat;
                return Float.isNaN(f) || Float.isInfinite(f);
            }
        }
        return false;
    }

    @Override
    public final Number getNumberValue() throws IOException
    {
        if (_numTypesValid == NR_UNKNOWN) {
            _parseNumericValue(); // will also check event type
        }
        switch (_numberType) {
        case INT:
            return _numberInt;
        case LONG:
            return _numberLong;
        case BIG_INTEGER:
            return _numberBigInt;
        case FLOAT:
            return _numberFloat;
        case DOUBLE:
            return _numberDouble;
        case BIG_DECIMAL:
        default:
            return _numberBigDecimal;
        }
    }

    @Override
    public final NumberType getNumberType() throws IOException
    {
        if (_numTypesValid == NR_UNKNOWN) {
            _parseNumericValue(); // will also check event type
        }
        return _numberType;
    }

    @Override
    public final int getIntValue() throws IOException
    {
        if ((_numTypesValid & NR_INT) == 0) {
            if (_numTypesValid == NR_UNKNOWN) {
                _parseNumericValue(); // will also check event type
            }
            if ((_numTypesValid & NR_INT) == 0) { // wasn't an int natively?
                convertNumberToInt(); // let's make it so, if possible
            }
        }
        return _numberInt;
    }
    
    @Override
    public final long getLongValue() throws IOException
    {
        if ((_numTypesValid & NR_LONG) == 0) {
            if (_numTypesValid == NR_UNKNOWN) {
                _parseNumericValue(); // will also check event type
            }
            if ((_numTypesValid & NR_LONG) == 0) {
                convertNumberToLong();
            }
        }
        return _numberLong;
    }
    
    @Override
    public final BigInteger getBigIntegerValue() throws IOException
    {
        if ((_numTypesValid & NR_BIGINT) == 0) {
            if (_numTypesValid == NR_UNKNOWN) {
                _parseNumericValue(); // will also check event type
            }
            if ((_numTypesValid & NR_BIGINT) == 0) {
                convertNumberToBigInteger();
            }
        }
        return _numberBigInt;
    }

    @Override
    public final float getFloatValue() throws IOException
    {
        if ((_numTypesValid & NR_FLOAT) == 0) {
            if (_numTypesValid == NR_UNKNOWN) {
                _parseNumericValue(); // will also check event type
            }
            if ((_numTypesValid & NR_FLOAT) == 0) {
                convertNumberToFloat();
            }
        }
        // Bounds/range checks would be tricky here, so let's not bother even trying...
        /*
        if (value < -Float.MAX_VALUE || value > MAX_FLOAT_D) {
            _reportError("Numeric value (%s) out of range of Java float", getText());
        }
        */
        return _numberFloat;
    }

    @Override
    public final double getDoubleValue() throws IOException
    {
        if ((_numTypesValid & NR_DOUBLE) == 0) {
            if (_numTypesValid == NR_UNKNOWN) {
                _parseNumericValue(); // will also check event type
            }
            if ((_numTypesValid & NR_DOUBLE) == 0) {
                convertNumberToDouble();
            }
        }
        return _numberDouble;
    }

    @Override
    public final BigDecimal getDecimalValue() throws IOException
    {
        if ((_numTypesValid & NR_BIGDECIMAL) == 0) {
            if (_numTypesValid == NR_UNKNOWN) {
                _parseNumericValue(); // will also check event type
            }
            if ((_numTypesValid & NR_BIGDECIMAL) == 0) {
                convertNumberToBigDecimal();
            }
        }
        return _numberBigDecimal;
    }

    /*
    /**********************************************************
    /* Numeric conversions
    /**********************************************************
     */    

    protected final void convertNumberToInt() throws IOException
    {
        // First, converting from long ought to be easy
        if ((_numTypesValid & NR_LONG) != 0) {
            // Let's verify it's lossless conversion by simple roundtrip
            int result = (int) _numberLong;
            if (((long) result) != _numberLong) {
                _reportError("Numeric value (%s) out of range of int", getText());
            }
            _numberInt = result;
        } else if ((_numTypesValid & NR_BIGINT) != 0) {
            if (BI_MIN_INT.compareTo(_numberBigInt) > 0 
                    || BI_MAX_INT.compareTo(_numberBigInt) < 0) {
                reportOverflowInt();
            }
            _numberInt = _numberBigInt.intValue();
        } else if ((_numTypesValid & NR_DOUBLE) != 0) {
            // Need to check boundaries
            if (_numberDouble < MIN_INT_D || _numberDouble > MAX_INT_D) {
                reportOverflowInt();
            }
            _numberInt = (int) _numberDouble;
        } else if ((_numTypesValid & NR_FLOAT) != 0) {
            if (_numberFloat < MIN_INT_D || _numberFloat > MAX_INT_D) {
                reportOverflowInt();
            }
            _numberInt = (int) _numberFloat;
        } else if ((_numTypesValid & NR_BIGDECIMAL) != 0) {
            if (BD_MIN_INT.compareTo(_numberBigDecimal) > 0 
                || BD_MAX_INT.compareTo(_numberBigDecimal) < 0) {
                reportOverflowInt();
            }
            _numberInt = _numberBigDecimal.intValue();
        } else {
            _throwInternal();
        }
        _numTypesValid |= NR_INT;
    }
    
    protected final void convertNumberToLong() throws IOException
    {
        int v = _numTypesValid;
        if ((v & NR_INT) != 0) {
            _numberLong = (long) _numberInt;
        } else if ((v & NR_BIGINT) != 0) {
            if (BI_MIN_LONG.compareTo(_numberBigInt) > 0 
                    || BI_MAX_LONG.compareTo(_numberBigInt) < 0) {
                reportOverflowLong();
            }
            _numberLong = _numberBigInt.longValue();
        } else if ((v & NR_DOUBLE) != 0) {
            if (_numberDouble < MIN_LONG_D || _numberDouble > MAX_LONG_D) {
                reportOverflowLong();
            }
            _numberLong = (long) _numberDouble;
        } else if ((v & NR_FLOAT) != 0) {
            if (_numberFloat < MIN_LONG_D || _numberFloat > MAX_LONG_D) {
                reportOverflowInt();
            }
            _numberLong = (long) _numberFloat;
        } else if ((v & NR_BIGDECIMAL) != 0) {
            if (BD_MIN_LONG.compareTo(_numberBigDecimal) > 0 
                || BD_MAX_LONG.compareTo(_numberBigDecimal) < 0) {
                reportOverflowLong();
            }
            _numberLong = _numberBigDecimal.longValue();
        } else {
            _throwInternal();
        }
        _numTypesValid |= NR_LONG;
    }
    
    protected final void convertNumberToBigInteger() throws IOException
    {
        if ((_numTypesValid & NR_BIGDECIMAL) != 0) {
            // here it'll just get truncated, no exceptions thrown
            _numberBigInt = _numberBigDecimal.toBigInteger();
        } else if ((_numTypesValid & NR_LONG) != 0) {
            _numberBigInt = BigInteger.valueOf(_numberLong);
        } else if ((_numTypesValid & NR_INT) != 0) {
            _numberBigInt = BigInteger.valueOf(_numberInt);
        } else if ((_numTypesValid & NR_DOUBLE) != 0) {
            _numberBigInt = BigDecimal.valueOf(_numberDouble).toBigInteger();
        } else if ((_numTypesValid & NR_FLOAT) != 0) {
            _numberBigInt = BigDecimal.valueOf(_numberFloat).toBigInteger();
        } else {
            _throwInternal();
        }
        _numTypesValid |= NR_BIGINT;
    }

    protected final void convertNumberToFloat() throws IOException
    {
        // 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_BIGDECIMAL) != 0) {
            _numberFloat = _numberBigDecimal.floatValue();
        } else if ((_numTypesValid & NR_BIGINT) != 0) {
            _numberFloat = _numberBigInt.floatValue();
        } else if ((_numTypesValid & NR_DOUBLE) != 0) {
            _numberFloat = (float) _numberDouble;
        } else if ((_numTypesValid & NR_LONG) != 0) {
            _numberFloat = (float) _numberLong;
        } else if ((_numTypesValid & NR_INT) != 0) {
            _numberFloat = (float) _numberInt;
        } else {
            _throwInternal();
        }
        _numTypesValid |= NR_FLOAT;
    }
    
    protected final void convertNumberToDouble() throws IOException
    {
        // 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_BIGDECIMAL) != 0) {
            _numberDouble = _numberBigDecimal.doubleValue();
        } else if ((_numTypesValid & NR_FLOAT) != 0) {
            _numberDouble = (double) _numberFloat;
        } else if ((_numTypesValid & NR_BIGINT) != 0) {
            _numberDouble = _numberBigInt.doubleValue();
        } else if ((_numTypesValid & NR_LONG) != 0) {
            _numberDouble = (double) _numberLong;
        } else if ((_numTypesValid & NR_INT) != 0) {
            _numberDouble = (double) _numberInt;
        } else {
            _throwInternal();
        }
        _numTypesValid |= NR_DOUBLE;
    }
    
    protected final void convertNumberToBigDecimal() throws IOException
    {
        // 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 | NR_FLOAT)) != 0) {
            // Let's 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;
    }

    /*
    /**********************************************************
    /* Internal/package methods: other
    /**********************************************************
     */
    
    
Method called when an EOF is encountered between tokens.
If so, it may be a legitimate EOF, but only iff there
is no open non-root context.
/**
     * Method called when an EOF is encountered between tokens.
     * If so, it may be a legitimate EOF, but only iff there
     * is no open non-root context.
     */
    @Override
    protected void _handleEOF() throws JsonParseException {
        if (!_parsingContext.inRoot()) {
            String marker = _parsingContext.inArray() ? "Array" : "Object";
            _reportInvalidEOF(String.format(
                    ": expected close marker for %s (start marker at %s)",
                    marker,
                    _parsingContext.getStartLocation(_getSourceReference())),
                    null);
        }
    }

    protected void _reportMismatchedEndMarker(int actCh, char expCh) throws JsonParseException {
        JsonReadContext ctxt = getParsingContext();
        _reportError(String.format(
                "Unexpected close marker '%s': expected '%c' (for %s starting at %s)",
                (char) actCh, expCh, ctxt.typeDesc(), ctxt.getStartLocation(_getSourceReference())));
    }

    
Helper method used to encapsulate logic of including (or not) of "source reference" when constructing JsonLocation instances. 
Since:
2.9/**
     * Helper method used to encapsulate logic of including (or not) of
     * "source reference" when constructing {@link JsonLocation} instances.
     *
     * @since 2.9
     */
    @SuppressWarnings("deprecation")
    protected Object _getSourceReference() {
        if (isEnabled(JsonParser.Feature.INCLUDE_SOURCE_IN_LOCATION)) {
            return _ioContext.getSourceReference();
        }
        return null;
    }
}