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package com.fitbur.jackson.databind.ext;

import java.io.IOException;
import java.util.*;

import javax.xml.datatype.*;
import javax.xml.namespace.QName;

import com.fitbur.jackson.core.*;

import com.fitbur.jackson.databind.*;
import com.fitbur.jackson.databind.deser.Deserializers;
import com.fitbur.jackson.databind.deser.std.FromStringDeserializer;

/**
 * Container deserializers that handle "core" XML types: ones included in standard
 * JDK 1.5. Types are directly needed by JAXB, but may be unavailable on some
 * limited platforms; hence separate out from basic deserializer factory.
 */
public class CoreXMLDeserializers extends Deserializers.Base
{
    /**
     * Data type factories are thread-safe after instantiation (and
     * configuration, if any); and since instantion (esp. implementation
     * introspection) can be expensive we better reuse the instance.
     */
    final static DatatypeFactory _dataTypeFactory;
    static {
        try {
            _dataTypeFactory = DatatypeFactory.newInstance();
        } catch (DatatypeConfigurationException e) {
            throw new RuntimeException(e);
        }
    }

    @Override
    public JsonDeserializer findBeanDeserializer(JavaType type,
        DeserializationConfig config, BeanDescription beanDesc)
    {
        Class raw = type.getRawClass();
        if (raw == QName.class) {
            return new Std(raw, TYPE_QNAME);
        }
        if (raw == XMLGregorianCalendar.class) {
            return new Std(raw, TYPE_G_CALENDAR);
        }
        if (raw == Duration.class) {
            return new Std(raw, TYPE_DURATION);
        }
        return null;
    }

    /*
    /**********************************************************
    /* Concrete deserializers
    /**********************************************************
     */

    protected final static int TYPE_DURATION = 1;
    protected final static int TYPE_G_CALENDAR = 2;
    protected final static int TYPE_QNAME = 3;

    /**
     * Combo-deserializer that supports deserialization of somewhat optional
     * javax.xml types {@link QName}, {@link Duration} and {@link XMLGregorianCalendar}.
     * Combined into a single class to eliminate bunch of one-off implementation
     * classes, to reduce resulting jar size (mostly).
     * 
     * @since 2.4
     */
    public static class Std extends FromStringDeserializer