tock-translator-core.2.0.0.source-code.DateTemplate.kt Maven / Gradle / Ivy

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/*
 * Copyright (C) 2017 VSCT
 *
 * 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 fr.vsct.tock.translator

import java.time.format.DateTimeFormatter
import java.time.temporal.TemporalAccessor
import java.util.Formattable
import java.util.Formatter
import java.util.Locale

/**
 * A date template is used to format a date (or a [TemporalAccessor]) for all supported [Locale] in the i18n process.
 */
class DateTemplate(
        private val date: TemporalAccessor?,
        private val formatterProvider: DateTimeFormatterProvider) : Formattable {

    constructor(date: TemporalAccessor?, dateFormatter: DateTimeFormatter) :
            this(
                    date,
                    object : DateTimeFormatterProvider {
                        override fun provide(locale: Locale): DateTimeFormatter = dateFormatter.withLocale(locale)
                    })

    private fun format(locale: Locale): String {
        return date?.let {
            formatterProvider.provide(locale).format(it)
        } ?: ""
    }

    /**
     * To immediately format this date with the given locale.
     */
    internal fun formatTo(locale: Locale): RawString = format(locale).raw

    override fun formatTo(formatter: Formatter, flags: Int, width: Int, precision: Int) {
        formatter.format(format(formatter.locale()))
    }

    override fun equals(other: Any?): Boolean {
        if (this === other) return true
        if (javaClass != other?.javaClass) return false

        other as DateTemplate

        if (date != other.date) return false

        return true
    }

    override fun hashCode(): Int {
        return date?.hashCode() ?: 0
    }

}