// HTMLParser Library $Name: v1_6_20060319 $ - A java-based parser for HTML
// http://sourceforge.org/projects/htmlparser
// Copyright (C) 2003 Derrick Oswald
//
// Revision Control Information
//
// $Source: /cvsroot/htmlparser/htmlparser/src/org/htmlparser/filters/StringFilter.java,v $
// $Author: derrickoswald $
// $Date: 2005/05/15 11:49:04 $
// $Revision: 1.6 $
//
// 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.
//
// 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 org.htmlparser.filters;
import java.util.Locale;
import org.htmlparser.Node;
import org.htmlparser.NodeFilter;
import org.htmlparser.Text;
/**
* This class accepts all string nodes containing the given string.
* This is a fairly simplistic filter, so for more sophisticated
* string matching, for example newline and whitespace handling,
* use a {@link RegexFilter} instead.
*/
public class StringFilter
implements
NodeFilter
{
/**
* The string to search for.
*/
protected String mPattern;
/**
* The string to really search for (converted to uppercase if necessary).
*/
protected String mUpperPattern;
/**
* Case sensitive toggle.
* If <code>true</code> strings are compared with case sensitivity.
*/
protected boolean mCaseSensitive;
/**
* The locale to use converting to uppercase in case insensitive searches.
*/
protected Locale mLocale;
/**
* Creates a new instance of StringFilter that accepts all string nodes.
*/
public StringFilter ()
{
this ("", false);
}
/**
* Creates a StringFilter that accepts text nodes containing a string.
* The comparison is case insensitive, with conversions done using
* the default <code>Locale</code>.
* @param pattern The pattern to search for.
*/
public StringFilter (String pattern)
{
this (pattern, false);
}
/**
* Creates a StringFilter that accepts text nodes containing a string.
* @param pattern The pattern to search for.
* @param sensitive If <code>true</code>, comparisons are performed
* respecting case, with conversions done using the default
* <code>Locale</code>.
*/
public StringFilter (String pattern, boolean sensitive)
{
this (pattern, sensitive, null);
}
/**
* Creates a StringFilter that accepts text nodes containing a string.
* @param pattern The pattern to search for.
* @param sensitive If <code>true</code>, comparisons are performed
* respecting case.
* @param locale The locale to use when converting to uppercase.
* If <code>null</code>, the default <code>Locale</code> is used.
*/
public StringFilter (String pattern, boolean sensitive, Locale locale)
{
mPattern = pattern;
mCaseSensitive = sensitive;
mLocale = (null == locale) ? Locale.getDefault () : locale;
setUpperPattern ();
}
//
// protected methods
//
/**
* Set the real (upper case) comparison string.
*/
protected void setUpperPattern ()
{
if (getCaseSensitive ())
mUpperPattern = getPattern ();
else
mUpperPattern = getPattern ().toUpperCase (getLocale ());
}
/**
* Get the case sensitivity.
* @return Returns the case sensitivity.
*/
public boolean getCaseSensitive ()
{
return (mCaseSensitive);
}
/**
* Set case sensitivity on or off.
* @param sensitive If <code>false</code> searches for the
* string are case insensitive.
*/
public void setCaseSensitive (boolean sensitive)
{
mCaseSensitive = sensitive;
setUpperPattern ();
}
/**
* Get the locale for uppercase conversion.
* @return Returns the locale.
*/
public Locale getLocale ()
{
return (mLocale);
}
/**
* Set the locale for uppercase conversion.
* @param locale The locale to set.
*/
public void setLocale (Locale locale)
{
mLocale = locale;
setUpperPattern ();
}
/**
* Get the search pattern.
* @return Returns the pattern.
*/
public String getPattern ()
{
return (mPattern);
}
/**
* Set the search pattern.
* @param pattern The pattern to set.
*/
public void setPattern (String pattern)
{
mPattern = pattern;
setUpperPattern ();
}
//
// NodeFilter interface
//
/**
* Accept string nodes that contain the string.
* @param node The node to check.
* @return <code>true</code> if <code>node</code> is a {@link Text} node
* and contains the pattern string, <code>false</code> otherwise.
*/
public boolean accept (Node node)
{
String string;
boolean ret;
ret = false;
if (node instanceof Text)
{
string = ((Text)node).getText ();
if (!getCaseSensitive ())
string = string.toUpperCase (getLocale ());
ret = (-1 != string.indexOf (mUpperPattern));
}
return (ret);
}
}