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Friki example source code file (PageRepository.java)

This example Friki source code file (PageRepository.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Friki tags/keywords

arraylist, date, iterator, iterator, list, mmmm, object, object, page, pagerepository, string, string, text, tract, tract, util

The Friki PageRepository.java source code

package com.efsol.friki;

import java.util.List;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.Date;
import java.text.DateFormat;
import java.text.SimpleDateFormat;

import org.stringtree.factory.Container;
import org.stringtree.factory.Repository;
import org.stringtree.factory.TractFetcher;
import org.stringtree.factory.TractStorer;
import org.stringtree.util.StringUtils;
import org.stringtree.util.tract.Tract;

public class PageRepository
	implements TractFetcher, TractStorer, Repository, Container
{
	protected static DateFormat df = new SimpleDateFormat("dd MMMM yyyy");
	protected RepositoryDriver driver;

	public PageRepository(RepositoryDriver driver)
	{
		this.driver = driver;
	}
	
	public Object getObject(String name)
	{
		Tract page = null;

		if (driver.isReadable(name))
		{
			page = driver.get(name);
		}

		if (page == null)
		{
			page = new Page(name);
		}

		return page;
	}
	
	public Tract get(String name)
	{
		Tract ret = (Tract)getObject(name);
		if (ret == null) 
		{
			ret = new Page(name);
		} 

		ret.put("escaped.name", escape(name));
		return ret;
	}

	public void put(String name, Tract page, boolean backup)
	{
		if (driver.isWritable(name))
		{
			if (backup)
			{
				String previous = driver.backup(name);
				page.put("previous.version", previous);
			}
			page.put("last.edit", df.format(new Date()));
			driver.put(name, page);
		}
	}

	public void put(String name, Tract page)
	{
		put(name, page, true);
	}

	public void put(String name, Object obj)
	{
		if (obj instanceof Tract)
		{
			put(name, (Tract)obj, false);
		}
		else
		{
			System.out.println("Warning. Attempt to put unrecognized object '" + obj + "' into page repository");
		}
	}

	public Iterator matchingPages(String pattern)
	{
		if (StringUtils.isBlank(pattern))
		{
			return driver.allPageNames();
		}

		List ret = new ArrayList();
		Iterator all = driver.allPageNames();
		while (all.hasNext())
		{
			String name = (String)all.next();
			
			if (name.indexOf(pattern) >= 0)
			{
				ret.add(name);
			}
			else
			{
				Tract page = driver.get(name);
				if (page != null)
				{
					String content = page.getContent();
					if (content != null && content.indexOf(pattern) >= 0)
					{
						ret.add(name);
					}
				}
			}
		}

		return ret.iterator();
	}

	public Iterator allPageNames()
	{
		return driver.allPageNames();
	}
	
	public void append(String pageName, String text)
	{
		Tract page = get(pageName);
		page.setContent(page.getContent() + text);
		put(pageName, page, false);
	}

	public void remove(String name)
	{
		driver.remove(name);
	}

	public void clear()
	{
		driver.clear();
	}

	public boolean contains(String name)
	{
		return driver.contains(name);
	}
	
	public String escape(String name)
	{
		return driver.escape(name);
	}
	
	public String unescape(String name)
	{
		return driver.unescape(name);
	}
}

Other Friki examples (source code examples)

Here is a short list of links related to this Friki PageRepository.java source code file:

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