bookdetails.java

Wicket一个开发Java Web应用程序框架。它使得开发web应用程序变得容易而轻松。 Wicket利用一个POJO data beans组件使得它可以与任何持久层技术相结合。

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.wicket.examples.library;

import java.util.Iterator;

import org.apache.wicket.AttributeModifier;
import org.apache.wicket.PageParameters;
import org.apache.wicket.markup.html.basic.Label;
import org.apache.wicket.markup.html.link.BookmarkablePageLink;
import org.apache.wicket.model.Model;
import org.apache.wicket.util.string.StringList;
import org.apache.wicket.util.string.StringValueConversionException;


/**
 * A book details page. Shows information about a book.
 * 
 * @author Jonathan Locke
 */
public final class BookDetails extends AuthenticatedWebPage
{
	/**
	 * Constructor for calls from external page links
	 * 
	 * @param parameters
	 *            Page parameters
	 * @throws StringValueConversionException
	 */
	public BookDetails(final PageParameters parameters) throws StringValueConversionException
	{
		this(Book.get(parameters.getLong("id")));
	}

	/**
	 * Constructor
	 * 
	 * @param book
	 *            The model
	 */
	public BookDetails(final Book book)
	{
		add(new Label("title", book.getTitle()));
		add(new Label("author", book.getAuthor()));
		add(new Label("fiction", Boolean.toString(book.getFiction())));
		add(BookDetails.link("companion", book.getCompanionBook(), getLocalizer().getString(
				"noBookTitle", this)));
		add(BookDetails.link("related", book.getRelatedBook(), getLocalizer().getString(
				"noBookTitle", this)));

		String writingStyles;
		final boolean hasStyles = (book.getWritingStyles() != null) &&
				(book.getWritingStyles().size() > 0);

		if (hasStyles)
		{
			StringList styles = new StringList();

			for (Iterator iterator = book.getWritingStyles().iterator(); iterator.hasNext();)
			{
				Book.WritingStyle style = (Book.WritingStyle)iterator.next();

				styles.add(getLocalizer().getString(style.toString(), this));
			}

			writingStyles = styles.toString();
		}
		else
		{
			writingStyles = getLocalizer().getString("noWritingStyles", this);
		}

		Label writingStylesLabel = new Label("writingStyles", writingStyles);

		final AttributeModifier italic = new AttributeModifier("class", new Model("italic"));
		italic.setEnabled(!hasStyles);

		add(writingStylesLabel.add(italic));
		add(EditBook.link("edit", book.getId()));
	}

	/**
	 * Creates an external page link
	 * 
	 * @param name
	 *            The name of the link component to create
	 * @param book
	 *            The book to link to
	 * @param noBookTitle
	 *            The title to show if book is null
	 * @return The external page link
	 */
	public static BookmarkablePageLink link(final String name, final Book book,
			final String noBookTitle)
	{
		final BookmarkablePageLink link = new BookmarkablePageLink(name, BookDetails.class);

		if (book != null)
		{
			link.setParameter("id", book.getId());
			link.add(new Label("title", new Model(book)));
		}
		else
		{
			link.add(new Label("title", noBookTitle));
			link.setEnabled(false);
		}

		return link;
	}
}