com.jain.addon.web.table.JainItemDescriptionGenerator.java Source code

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Here is the source code for com.jain.addon.web.table.JainItemDescriptionGenerator.java

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/* 
 * Copyright 2012 Lokesh Jain.
 * 
 * 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 com.jain.addon.web.table;

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

import com.jain.addon.JNINamed;
import com.jain.addon.i18N.I18NItemDescriptionGenerator;
import com.jain.addon.resource.I18NProvider;
import com.jain.addon.resource.DefaultI18NResourceProvider;
import com.jain.addon.web.bean.JNIProperty;
import com.jain.addon.web.bean.helper.JainHelper;
import com.vaadin.data.Item;
import com.vaadin.data.Property;
import com.vaadin.ui.Component;
import com.vaadin.ui.Table;

/**
 * <code>JainItemDescriptionGenerator<code> is a default Item description generator for the {@link JTable}
 * @author Lokesh Jain
 * @since Aug 28, 2012
 * @version 1.0.0
 */
@SuppressWarnings("serial")
public class JainItemDescriptionGenerator implements I18NItemDescriptionGenerator {
    private JNIProperty[] properties;
    private Locale locale;

    public JainItemDescriptionGenerator(Locale locale, JNIProperty... properties) {
        this.properties = properties;
        this.locale = locale;
    }

    public String generateDescription(Component source, Object itemId, Object propertyId) {
        if (propertyId == null) {
            return JainHelper.getPojoState(locale, itemId, properties);
        }

        JNIProperty property = JainHelper.getPropertyForName(properties, propertyId);

        if (property != null && property.getType() != null) {
            Item item = ((Table) source).getItem(itemId);
            Property<?> itemProperty = item.getItemProperty(property.getName());

            switch (property.getType()) {
            case RICH_TEXT_AREA:
            case TEXT_AREA:
            case UN_SPECIFIED:
            case MULTI_SELECT:
                return formatText(itemProperty, source, itemId, propertyId);
            case DATE:
                return formatDate(itemProperty);
            default:
                break;
            }
        }
        return null;
    }

    public JNIProperty[] getProperties() {
        return properties;
    }

    public void setProperties(JNIProperty[] properties) {
        this.properties = properties;
    }

    public Locale getLocale() {
        return locale;
    }

    public void setLocale(Locale locale) {
        this.locale = locale;
    }

    private String formatText(final Property<?> itemProperty, Component source, Object itemId, Object propertyId) {
        Object item = itemProperty.getValue();
        if (item != null) {
            StringBuilder content = null;

            if (item instanceof JNINamed) {
                String caption = ((JNINamed) item).getDisplayName();
                if (item.getClass().isEnum()) {
                    I18NProvider provider = DefaultI18NResourceProvider.instance();
                    String value = provider.getText(getLocale(), caption);
                    if (caption.equals(value))
                        value = provider.getTitle(getLocale(), caption);
                    content = new StringBuilder(value);
                } else {
                    content = new StringBuilder(caption);
                }
            } else {
                content = new StringBuilder(item.toString());
            }

            if (content.length() > 25)
                return content.toString();
            return JainHelper.getPojoState(source.getLocale(), itemId, properties);
        }
        return null;
    }

    private String formatDate(final Property<?> itemProperty) {
        if (itemProperty.getValue() != null) {
            SimpleDateFormat df = new SimpleDateFormat("EEEEE MMMMM dd, yyyy hh:mm:ss aaa");
            return df.format((Date) itemProperty.getValue());
        }
        return null;
    }
}