au.id.jericho.lib.html.CharStreamSourceUtil Maven / Gradle / Ivy
// Jericho HTML Parser - Java based library for analysing and manipulating HTML
// Version 2.3
// Copyright (C) 2006 Martin Jericho
// http://sourceforge.net/projects/jerichohtml/
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
// http://www.gnu.org/copyleft/lesser.html
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
package au.id.jericho.lib.html;
import java.io.*;
import java.nio.*;
/**
* Contains static utility methods for manipulating the way data is retrieved from a {@link CharStreamSource} object.
*
* See the documentation of the {@link CharStreamSource} class for details.
*/
public final class CharStreamSourceUtil {
private static final int DEFAULT_ESTIMATED_MAXIMUM_OUTPUT_LENGTH=2048;
private CharStreamSourceUtil() {}
/**
* Returns a Reader that reads the output of the specified {@link CharStreamSource}.
*
* The current implementation of this method simply returns new StringReader({@link #toString(CharStreamSource) toString(charStreamSource)}),
* but a future version may implement this method in a more memory efficient manner.
*
* @param charStreamSource the character stream source producing the output.
* @return a Reader that reads the output of the specified {@link CharStreamSource}.
*/
public static Reader getReader(final CharStreamSource charStreamSource) {
return new StringReader(toString(charStreamSource));
}
/**
* Returns the output of the specified {@link CharStreamSource} as a string.
*
* The current implementation of this method simply returns new StringReader({@link #toString(CharStreamSource) toString(charStreamSource)}),
* but a future version may implement this method in a more memory efficient manner.
*
* @param charStreamSource the character stream source producing the output.
* @return the output of the specified {@link CharStreamSource} as a string.
*/
public static String toString(final CharStreamSource charStreamSource) {
long estimatedMaximumOutputLength=charStreamSource.getEstimatedMaximumOutputLength();
if (estimatedMaximumOutputLength==-1L) estimatedMaximumOutputLength=DEFAULT_ESTIMATED_MAXIMUM_OUTPUT_LENGTH;
final StringWriter writer=new StringWriter((int)(estimatedMaximumOutputLength));
try {
charStreamSource.writeTo(writer);
} catch (IOException ex) {throw new RuntimeException(ex);} // assume the IOException is not thrown explicitly by the charStreamSource.output method
return writer.toString();
}
}