org.jboss.errai.demo.client.local.DateConverter.java Source code

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Here is the source code for org.jboss.errai.demo.client.local.DateConverter.java

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/**
 * Copyright (C) 2016 Red Hat, Inc. and/or its affiliates.
 *
 * 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 org.jboss.errai.demo.client.local;

import java.util.Date;

import org.jboss.errai.databinding.client.api.Bindable;
import org.jboss.errai.databinding.client.api.Converter;

import com.google.gwt.core.client.JsDate;
import com.google.gwt.dom.client.InputElement;

/**
 * Converts between {@link Date} instances used in {@link Bindable} models, and {@link String Strings} used in
 * {@link InputElement} values. Uses Javascript's native {@code Date} object for conversion so that the date
 * {@link String Strings} are properly displayed in input elements with the type "date".
 */
public class DateConverter implements Converter<Date, String> {

    @Override
    public Date toModelValue(final String widgetValue) {
        if (widgetValue == null || widgetValue.equals("")) {
            return null;
        }

        final JsDate jsDate = JsDate.create(widgetValue);
        return new Date((long) jsDate.getTime());
    }

    @Override
    public String toWidgetValue(final Date modelValue) {
        if (modelValue == null) {
            return "";
        } else {
            final JsDate jsDate = JsDate.create(((Long) modelValue.getTime()).doubleValue());
            return toISODate(jsDate);
        }
    }

    private static native String toISODate(final JsDate date) /*-{
                                                              return date.toISOString().substring(0, 10);
                                                              }-*/;

    @Override
    public Class<Date> getModelType() {
        return Date.class;
    }

    @Override
    public Class<String> getComponentType() {
        return String.class;
    }

}