de.perdian.commons.lang.conversion.impl.converters.AbstractNumberFormatConverter.java Source code

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Here is the source code for de.perdian.commons.lang.conversion.impl.converters.AbstractNumberFormatConverter.java

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/*
 * Copyright 2013 Christian Robert
 *
 * 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 de.perdian.commons.lang.conversion.impl.converters;

import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;
import java.text.NumberFormat;
import java.util.Locale;
import java.util.Optional;

import org.springframework.context.i18n.LocaleContext;

public abstract class AbstractNumberFormatConverter<A, B> extends AbstractFormatConverter<A, B, NumberFormat> {

    private String pattern = null;

    public AbstractNumberFormatConverter() {
    }

    public AbstractNumberFormatConverter(NumberFormat format) {
        this.setFormat(format);
    }

    public AbstractNumberFormatConverter(String pattern) {
        this(pattern, null);
    }

    public AbstractNumberFormatConverter(String pattern, LocaleContext localeContext) {
        this.setPattern(pattern);
        this.setLocaleContext(localeContext);
    }

    @Override
    protected NumberFormat resolveDefaultFormat(Locale locale) {
        return Optional.ofNullable(this.getPattern())
                .<NumberFormat>map(pattern -> new DecimalFormat(pattern, new DecimalFormatSymbols(locale)))
                .orElseGet(NumberFormat::getInstance);
    }

    // -------------------------------------------------------------------------
    // --- Property access methods ---------------------------------------------
    // -------------------------------------------------------------------------

    public String getPattern() {
        return this.pattern;
    }

    public void setPattern(String pattern) {
        this.pattern = pattern;
    }

}