org.apache.wicket.response.FileResponse Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of org.ops4j.pax.wicket.service Show documentation

Pax Wicket Service is an OSGi extension of the Wicket framework, allowing for dynamic loading and unloading of Wicket components and pageSources.

There is a newer version: 5.0.0

Show newest version

/*
 * 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.response;

import java.io.BufferedWriter;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintWriter;

import org.apache.wicket.Response;
import org.apache.wicket.WicketRuntimeException;
import org.apache.wicket.util.file.File;


/**
 * A Response implementation that writes to a file.
 * 
 * @author Jonathan Locke
 */
public final class FileResponse extends Response
{
	/** The file to write to */
	private final File file;

	/** Output stream to write to */
	private OutputStream out;

	/** Output PrintWriter to write to */
	private PrintWriter printWriter;

	/**
	 * Constructor
	 * 
	 * @param file
	 *            The file to write to
	 */
	public FileResponse(final File file)
	{
		this.file = file;
	}

	/**
	 * @see org.apache.wicket.Response#close()
	 */
	@Override
	public void close()
	{
		if (printWriter != null)
		{
			printWriter.close();
			printWriter = null;
		}
		if (out != null)
		{
			try
			{
				out.close();
				out = null;
			}
			catch (IOException e)
			{
				throw new WicketRuntimeException("Unable to close to file " + file, e);
			}
		}
	}

	/**
	 * @see org.apache.wicket.Response#getOutputStream()
	 */
	@Override
	public OutputStream getOutputStream()
	{
		try
		{
			if (out == null)
			{
				out = new FileOutputStream(file);
			}
			return out;
		}
		catch (FileNotFoundException e)
		{
			throw new WicketRuntimeException("Unable to get output stream to file " + file, e);
		}
	}

	/**
	 * @see org.apache.wicket.Response#write(CharSequence)
	 */
	@Override
	public void write(final CharSequence string)
	{
		try
		{
			getPrintWriter().print(string);
		}
		catch (IOException e)
		{
			throw new WicketRuntimeException("Unable to write to file " + file, e);
		}
	}

	private PrintWriter getPrintWriter() throws IOException
	{
		if (printWriter == null)
		{
			printWriter = new PrintWriter(new BufferedWriter(new FileWriter(file)));
		}
		return printWriter;
	}
}