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package com.fasterxml.jackson.core.json;

import java.io.IOException;

import com.fasterxml.jackson.core.*;
import com.fasterxml.jackson.core.JsonParser.NumberTypeFP;
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.util.JacksonFeatureSet;

/**
 * Another intermediate base class, only used by actual JSON-backed parser
 * implementations.
 *
 * @since 2.17
 */
public abstract class JsonParserBase
    extends ParserBase
{
    @SuppressWarnings("deprecation")
    protected final static int FEAT_MASK_TRAILING_COMMA = Feature.ALLOW_TRAILING_COMMA.getMask();
    @SuppressWarnings("deprecation")
    protected final static int FEAT_MASK_LEADING_ZEROS = Feature.ALLOW_NUMERIC_LEADING_ZEROS.getMask();
    @SuppressWarnings("deprecation")
    protected final static int FEAT_MASK_NON_NUM_NUMBERS = Feature.ALLOW_NON_NUMERIC_NUMBERS.getMask();
    @SuppressWarnings("deprecation")
    protected final static int FEAT_MASK_ALLOW_MISSING = Feature.ALLOW_MISSING_VALUES.getMask();
    protected final static int FEAT_MASK_ALLOW_SINGLE_QUOTES = Feature.ALLOW_SINGLE_QUOTES.getMask();
    protected final static int FEAT_MASK_ALLOW_UNQUOTED_NAMES = Feature.ALLOW_UNQUOTED_FIELD_NAMES.getMask();
    protected final static int FEAT_MASK_ALLOW_JAVA_COMMENTS = Feature.ALLOW_COMMENTS.getMask();
    protected final static int FEAT_MASK_ALLOW_YAML_COMMENTS = Feature.ALLOW_YAML_COMMENTS.getMask();

    // 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[] INPUT_CODES_LATIN1 = CharTypes.getInputCodeLatin1();

    // This is the main input-code lookup table, fetched eagerly
    protected final static int[] INPUT_CODES_UTF8 = CharTypes.getInputCodeUtf8();

    /*
    /**********************************************************
    /* Configuration
    /**********************************************************
     */

    /**
     * Codec used for data binding when (if) requested; typically full
     * ObjectMapper, but that abstract is not part of core
     * package.
     */
    protected ObjectCodec _objectCodec;

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

    protected JsonParserBase(IOContext ioCtxt, int features, ObjectCodec codec) {
        super(ioCtxt, features);
        _objectCodec = codec;
    }

    @Override
    public ObjectCodec getCodec() {
        return _objectCodec;
    }

    @Override
    public void setCodec(ObjectCodec c) {
        _objectCodec = c;
    }

    /*
    /**********************************************************************
    /* Capability introspection
    /**********************************************************************
     */

    @Override
    public final JacksonFeatureSet getReadCapabilities() {
        return JSON_READ_CAPABILITIES;
    }

    /*
    /**********************************************************************
    /* Overrides
    /**********************************************************************
     */

    /**
     * JSON format does not have native information on "correct" floating-point
     * type to use, unlike some formats (most binary formats), so it needs to
     * indicate this as {@link NumberTypeFP#UNKNOWN}.
     *
     * @return Natural floating-point type if known; {@link NumberTypeFP#UNKNOWN} for
     *    all JSON-backed parsers.
     */
    @Override // added in 2.17
    public NumberTypeFP getNumberTypeFP() throws IOException {
        return NumberTypeFP.UNKNOWN;
    }

    /*
    /**********************************************************************
    /* Location handling
    /**********************************************************************
     */

    // First: override some methods as abstract to force definition by subclasses
    
    @Override
    public abstract JsonLocation currentLocation();

    @Override
    public abstract JsonLocation currentTokenLocation();

    @Override
    protected abstract JsonLocation _currentLocationMinusOne();

    @Deprecated // since 2.17
    @Override
    public final JsonLocation getCurrentLocation() {
        return currentLocation();
    }
    
    @Deprecated // since 2.17
    @Override
    public final JsonLocation getTokenLocation() {
        return currentTokenLocation();
    }
}