com.fasterxml.jackson.datatype.jsr310.deser.LocalDateDeserializer.java Source code

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Here is the source code for com.fasterxml.jackson.datatype.jsr310.deser.LocalDateDeserializer.java

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/*
 * Copyright 2013 FasterXML.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you may
 * not use this file except in compliance with the License. You may obtain
 * a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the license for the specific language governing permissions and
 * limitations under the license.
 */

package com.fasterxml.jackson.datatype.jsr310.deser;

import java.io.IOException;
import java.time.DateTimeException;
import java.time.Instant;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.ZoneOffset;
import java.time.format.DateTimeFormatter;

import com.fasterxml.jackson.core.*;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonDeserializer;

/**
 * Deserializer for Java 8 temporal {@link LocalDate}s.
 *
 * @author Nick Williams
 * @since 2.2.0
 */
public class LocalDateDeserializer extends JSR310DateTimeDeserializerBase<LocalDate> {
    private static final long serialVersionUID = 1L;

    private static final DateTimeFormatter DEFAULT_FORMATTER = DateTimeFormatter.ISO_LOCAL_DATE;

    public static final LocalDateDeserializer INSTANCE = new LocalDateDeserializer();

    private LocalDateDeserializer() {
        this(DEFAULT_FORMATTER);
    }

    public LocalDateDeserializer(DateTimeFormatter dtf) {
        super(LocalDate.class, dtf);
    }

    @Override
    protected JsonDeserializer<LocalDate> withDateFormat(DateTimeFormatter dtf) {
        return new LocalDateDeserializer(dtf);
    }

    @Override
    public LocalDate deserialize(JsonParser parser, DeserializationContext context) throws IOException {
        if (parser.hasToken(JsonToken.VALUE_STRING)) {
            String string = parser.getText().trim();
            if (string.length() == 0) {
                return null;
            }
            // as per [datatype-jsr310#37], only check for optional (and, incorrect...) time marker 'T'
            // if we are using default formatter
            DateTimeFormatter format = _formatter;
            try {
                if (format == DEFAULT_FORMATTER) {
                    // JavaScript by default includes time in JSON serialized Dates (UTC/ISO instant format).
                    if (string.length() > 10 && string.charAt(10) == 'T') {
                        if (string.endsWith("Z")) {
                            return LocalDateTime.ofInstant(Instant.parse(string), ZoneOffset.UTC).toLocalDate();
                        } else {
                            return LocalDate.parse(string, DateTimeFormatter.ISO_LOCAL_DATE_TIME);
                        }
                    }
                }
                return LocalDate.parse(string, format);
            } catch (DateTimeException e) {
                _rethrowDateTimeException(parser, context, e, string);
            }
        }
        if (parser.isExpectedStartArrayToken()) {
            if (parser.nextToken() == JsonToken.END_ARRAY) {
                return null;
            }
            int year = parser.getIntValue();
            int month = parser.nextIntValue(-1);
            int day = parser.nextIntValue(-1);

            if (parser.nextToken() != JsonToken.END_ARRAY) {
                throw context.wrongTokenException(parser, JsonToken.END_ARRAY, "Expected array to end.");
            }
            return LocalDate.of(year, month, day);
        }
        if (parser.hasToken(JsonToken.VALUE_EMBEDDED_OBJECT)) {
            return (LocalDate) parser.getEmbeddedObject();
        }
        throw context.wrongTokenException(parser, JsonToken.VALUE_STRING, "Expected array or string.");
    }
}