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Eclipse Yasson. Reference implementation of JSR-367 (JSON-B).

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/*******************************************************************************
 * Copyright (c) 2016, 2018 Oracle and/or its affiliates. All rights reserved.
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 and Eclipse Distribution License v. 1.0
 * which accompanies this distribution.
 * The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
 * and the Eclipse Distribution License is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * Contributors:
 * Roman Grigoriadi
 ******************************************************************************/

package org.eclipse.yasson.internal.serializer;

import org.eclipse.yasson.internal.JsonbContext;
import org.eclipse.yasson.internal.model.customization.Customization;
import org.eclipse.yasson.internal.properties.MessageKeys;
import org.eclipse.yasson.internal.properties.Messages;

import javax.json.bind.JsonbException;
import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.text.ParseException;
import java.util.Optional;

/**
 * Common serializer for numbers, using number format.
 *
 * @author Roman Grigoriadi
 * @param  Type to deserialize.
 */
public abstract class AbstractNumberDeserializer extends AbstractValueTypeDeserializer {

    /**
     * Creates a new instance.
     *
     * @param clazz         Class to work with.
     * @param customization Model customization.
     */
    public AbstractNumberDeserializer(Class clazz, Customization customization) {
        super(clazz, customization);
    }

    protected final Optional deserializeFormatted(String jsonValue, boolean integerOnly, JsonbContext jsonbContext) {
        if (getCustomization() == null || getCustomization().getDeserializeNumberFormatter() == null) {
            return Optional.empty();
        }

        final JsonbNumberFormatter numberFormat = getCustomization().getDeserializeNumberFormatter();
        //consider synchronizing on format instance or per thread cache.
        final NumberFormat format = NumberFormat.getInstance(jsonbContext.getConfigProperties().getLocale(numberFormat.getLocale()));
        ((DecimalFormat)format).applyPattern(numberFormat.getFormat());
        format.setParseIntegerOnly(integerOnly);
        try {
            return Optional.of(format.parse(jsonValue));
        } catch (ParseException e) {
            throw new JsonbException(Messages.getMessage(MessageKeys.PARSING_NUMBER, jsonValue, numberFormat.getFormat()));
        }
    }
}