de.alpharogroup.wicket.data.table.DateColumn.java Source code

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Here is the source code for de.alpharogroup.wicket.data.table.DateColumn.java

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/**
 * Copyright (C) 2010 Asterios Raptis
 *
 * 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.alpharogroup.wicket.data.table;

import java.text.SimpleDateFormat;
import java.util.Date;

import org.apache.wicket.extensions.markup.html.repeater.data.grid.ICellPopulator;
import org.apache.wicket.extensions.markup.html.repeater.data.table.PropertyColumn;
import org.apache.wicket.markup.html.basic.Label;
import org.apache.wicket.markup.repeater.Item;
import org.apache.wicket.model.AbstractReadOnlyModel;
import org.apache.wicket.model.IModel;
import org.apache.wicket.util.lang.Args;

/**
 * The class {@link DateColumn} can format a date.
 *
 * @param <T>
 *            the generic type from the model object
 */
public class DateColumn<T> extends PropertyColumn<T, Void> {
    /** The Constant serialVersionUID. */
    private static final long serialVersionUID = 1L;

    /** The date format. */
    private final String dateFormat;

    /**
     * Instantiates a new {@link DateColumn} object.
     *
     * @param displayModel
     *            the display model
     * @param propertyExpression
     *            the property expression
     * @param dateFormat
     *            the date format
     */
    public DateColumn(final IModel<String> displayModel, final String propertyExpression, final String dateFormat) {
        super(displayModel, propertyExpression);
        this.dateFormat = Args.notNull(dateFormat, "dateFormat");
    }

    /**
     * Callback method for provide specific behavior on method
     * {@link AbstractReadOnlyModel#getObject()}.
     *
     * @param rowModel
     *            the row model
     * @return the string
     */
    protected String onGetObject(final IModel<T> rowModel) {
        final IModel<?> propertyModel = DateColumn.this.getDataModel(rowModel);
        final Date value = (Date) propertyModel.getObject();
        final SimpleDateFormat format = new SimpleDateFormat(dateFormat);
        return format.format(value);
    }

    /**
     * {@inheritDoc}
     **/
    @Override
    public void populateItem(final Item<ICellPopulator<T>> cellItem, final String componentId,
            final IModel<T> rowModel) {
        cellItem.add(new Label(componentId, new AbstractReadOnlyModel<String>() {
            private static final long serialVersionUID = 1L;

            /** * {@inheritDoc} */
            @Override
            public String getObject() {
                return onGetObject(rowModel);
            }
        }));
    }
}