package com.fasterxml.jackson.databind.deser.std;

import java.io.IOException;
import java.lang.reflect.Constructor;
import java.sql.Timestamp;
import java.text.*;
import java.util.*;

import com.fasterxml.jackson.annotation.JsonFormat;

import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonToken;

import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.databind.annotation.JacksonStdImpl;
import com.fasterxml.jackson.databind.deser.ContextualDeserializer;
import com.fasterxml.jackson.databind.util.ClassUtil;
import com.fasterxml.jackson.databind.util.StdDateFormat;

Container class for core JDK date/time type deserializers.
/** * Container class for core JDK date/time type deserializers. */
@SuppressWarnings("serial") public class DateDeserializers { private final static HashSet<String> _classNames = new HashSet<String>(); static { Class<?>[] numberTypes = new Class<?>[] { Calendar.class, GregorianCalendar.class, java.sql.Date.class, java.util.Date.class, Timestamp.class, }; for (Class<?> cls : numberTypes) { _classNames.add(cls.getName()); } } public static JsonDeserializer<?> find(Class<?> rawType, String clsName) { if (_classNames.contains(clsName)) { // Start with the most common type if (rawType == Calendar.class) { return new CalendarDeserializer(); } if (rawType == java.util.Date.class) { return DateDeserializer.instance; } if (rawType == java.sql.Date.class) { return new SqlDateDeserializer(); } if (rawType == Timestamp.class) { return new TimestampDeserializer(); } if (rawType == GregorianCalendar.class) { return new CalendarDeserializer(GregorianCalendar.class); } } return null; } // @since 2.11 public static boolean hasDeserializerFor(Class<?> rawType) { return _classNames.contains(rawType.getName()); } /* /********************************************************** /* Intermediate class for Date-based ones /********************************************************** */ protected abstract static class DateBasedDeserializer<T> extends StdScalarDeserializer<T> implements ContextualDeserializer {
Specific format to use, if non-null; if null will just use default format.
/** * Specific format to use, if non-null; if null will * just use default format. */
protected final DateFormat _customFormat;
Let's also keep format String for reference, to use for error messages
/** * Let's also keep format String for reference, to use for error messages */
protected final String _formatString; protected DateBasedDeserializer(Class<?> clz) { super(clz); _customFormat = null; _formatString = null; } protected DateBasedDeserializer(DateBasedDeserializer<T> base, DateFormat format, String formatStr) { super(base._valueClass); _customFormat = format; _formatString = formatStr; } protected abstract DateBasedDeserializer<T> withDateFormat(DateFormat df, String formatStr); @Override public JsonDeserializer<?> createContextual(DeserializationContext ctxt, BeanProperty property) throws JsonMappingException { final JsonFormat.Value format = findFormatOverrides(ctxt, property, handledType()); if (format != null) { TimeZone tz = format.getTimeZone(); final Boolean lenient = format.getLenient(); // First: fully custom pattern? if (format.hasPattern()) { final String pattern = format.getPattern(); final Locale loc = format.hasLocale() ? format.getLocale() : ctxt.getLocale(); SimpleDateFormat df = new SimpleDateFormat(pattern, loc); if (tz == null) { tz = ctxt.getTimeZone(); } df.setTimeZone(tz); if (lenient != null) { df.setLenient(lenient); } return withDateFormat(df, pattern); } // But if not, can still override timezone if (tz != null) { DateFormat df = ctxt.getConfig().getDateFormat(); // one shortcut: with our custom format, can simplify handling a bit if (df.getClass() == StdDateFormat.class) { final Locale loc = format.hasLocale() ? format.getLocale() : ctxt.getLocale(); StdDateFormat std = (StdDateFormat) df; std = std.withTimeZone(tz); std = std.withLocale(loc); if (lenient != null) { std = std.withLenient(lenient); } df = std; } else { // otherwise need to clone, re-set timezone: df = (DateFormat) df.clone(); df.setTimeZone(tz); if (lenient != null) { df.setLenient(lenient); } } return withDateFormat(df, _formatString); } // or maybe even just leniency? if (lenient != null) { DateFormat df = ctxt.getConfig().getDateFormat(); String pattern = _formatString; // one shortcut: with our custom format, can simplify handling a bit if (df.getClass() == StdDateFormat.class) { StdDateFormat std = (StdDateFormat) df; std = std.withLenient(lenient); df = std; pattern = std.toPattern(); } else { // otherwise need to clone, df = (DateFormat) df.clone(); df.setLenient(lenient); if (df instanceof SimpleDateFormat) { ((SimpleDateFormat) df).toPattern(); } } if (pattern == null) { pattern = "[unknown]"; } return withDateFormat(df, pattern); } } return this; } @Override protected java.util.Date _parseDate(JsonParser p, DeserializationContext ctxt) throws IOException { if (_customFormat != null) { if (p.hasToken(JsonToken.VALUE_STRING)) { String str = p.getText().trim(); if (str.length() == 0) { return (Date) getEmptyValue(ctxt); } synchronized (_customFormat) { try { return _customFormat.parse(str); } catch (ParseException e) { return (java.util.Date) ctxt.handleWeirdStringValue(handledType(), str, "expected format \"%s\"", _formatString); } } } } return super._parseDate(p, ctxt); } } /* /********************************************************** /* Deserializer implementations for Date types /********************************************************** */ @JacksonStdImpl public static class CalendarDeserializer extends DateBasedDeserializer<Calendar> {
We may know actual expected type; if so, it will be used for instantiation.
Since:2.9
/** * We may know actual expected type; if so, it will be * used for instantiation. * * @since 2.9 */
protected final Constructor<Calendar> _defaultCtor; public CalendarDeserializer() { super(Calendar.class); _defaultCtor = null; } @SuppressWarnings("unchecked") public CalendarDeserializer(Class<? extends Calendar> cc) { super(cc); _defaultCtor = (Constructor<Calendar>) ClassUtil.findConstructor(cc, false); } public CalendarDeserializer(CalendarDeserializer src, DateFormat df, String formatString) { super(src, df, formatString); _defaultCtor = src._defaultCtor; } @Override protected CalendarDeserializer withDateFormat(DateFormat df, String formatString) { return new CalendarDeserializer(this, df, formatString); } @Override public Calendar deserialize(JsonParser p, DeserializationContext ctxt) throws IOException { Date d = _parseDate(p, ctxt); if (d == null) { return null; } if (_defaultCtor == null) { return ctxt.constructCalendar(d); } try { Calendar c = _defaultCtor.newInstance(); c.setTimeInMillis(d.getTime()); TimeZone tz = ctxt.getTimeZone(); if (tz != null) { c.setTimeZone(tz); } return c; } catch (Exception e) { return (Calendar) ctxt.handleInstantiationProblem(handledType(), d, e); } } }
Simple deserializer for handling Date values.

One way to customize Date formats accepted is to override method DeserializationContext.parseDate that this basic deserializer calls.

/** * Simple deserializer for handling {@link java.util.Date} values. *<p> * One way to customize Date formats accepted is to override method * {@link DeserializationContext#parseDate} that this basic * deserializer calls. */
@JacksonStdImpl public static class DateDeserializer extends DateBasedDeserializer<Date> { public final static DateDeserializer instance = new DateDeserializer(); public DateDeserializer() { super(Date.class); } public DateDeserializer(DateDeserializer base, DateFormat df, String formatString) { super(base, df, formatString); } @Override protected DateDeserializer withDateFormat(DateFormat df, String formatString) { return new DateDeserializer(this, df, formatString); } @Override public java.util.Date deserialize(JsonParser p, DeserializationContext ctxt) throws IOException { return _parseDate(p, ctxt); } }
Compared to plain old Date, SQL version is easier to deal with: mostly because it is more limited.
/** * Compared to plain old {@link java.util.Date}, SQL version is easier * to deal with: mostly because it is more limited. */
public static class SqlDateDeserializer extends DateBasedDeserializer<java.sql.Date> { public SqlDateDeserializer() { super(java.sql.Date.class); } public SqlDateDeserializer(SqlDateDeserializer src, DateFormat df, String formatString) { super(src, df, formatString); } @Override protected SqlDateDeserializer withDateFormat(DateFormat df, String formatString) { return new SqlDateDeserializer(this, df, formatString); } @Override public java.sql.Date deserialize(JsonParser p, DeserializationContext ctxt) throws IOException { Date d = _parseDate(p, ctxt); return (d == null) ? null : new java.sql.Date(d.getTime()); } }
Simple deserializer for handling Timestamp values.

One way to customize Timestamp formats accepted is to override method DeserializationContext.parseDate that this basic deserializer calls.

/** * Simple deserializer for handling {@link java.sql.Timestamp} values. *<p> * One way to customize Timestamp formats accepted is to override method * {@link DeserializationContext#parseDate} that this basic * deserializer calls. */
public static class TimestampDeserializer extends DateBasedDeserializer<Timestamp> { public TimestampDeserializer() { super(Timestamp.class); } public TimestampDeserializer(TimestampDeserializer src, DateFormat df, String formatString) { super(src, df, formatString); } @Override protected TimestampDeserializer withDateFormat(DateFormat df, String formatString) { return new TimestampDeserializer(this, df, formatString); } @Override public java.sql.Timestamp deserialize(JsonParser p, DeserializationContext ctxt) throws IOException { Date d = _parseDate(p, ctxt); return (d == null) ? null : new Timestamp(d.getTime()); } } }