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/*******************************************************************************
* Copyright (c) 2014 Jeff Martin.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the GNU Public License v3.0
* which accompanies this distribution, and is available at
* http://www.gnu.org/licenses/gpl.html
*
* Contributors:
* Jeff Martin - initial API and implementation
******************************************************************************/
package cuchaz.enigma.analysis;
import java.util.Iterator;
import jsyntaxpane.SyntaxDocument;
import jsyntaxpane.Token;
import jsyntaxpane.TokenType;
import jsyntaxpane.lexers.JavaLexer;
public class Lexer implements Iterable<Token>
{
private SyntaxDocument m_doc;
private Iterator<Token> m_iter;
public Lexer( CharSequence source )
{
m_doc = new SyntaxDocument( new JavaLexer() );
m_doc.append( source.toString() );
m_iter = m_doc.getTokens( 0, m_doc.getLength() );
}
@Override
public Iterator<Token> iterator( )
{
return m_iter;
}
public String getText( Token token )
{
return token.getString( m_doc );
}
public Token getFirstIdentifier( )
{
for( Token token : this )
{
if( token.type == TokenType.IDENTIFIER )
{
return token;
}
}
return null;
}
public Token getFirstIdentifierMatching( CharSequence val )
{
for( Token token : this )
{
if( token.type == TokenType.IDENTIFIER && getText( token ).equals( val.toString() ) )
{
return token;
}
}
return null;
}
public Token getLastIdentifier( )
{
Token lastToken = null;
for( Token token : this )
{
if( token.type == TokenType.IDENTIFIER )
{
lastToken = token;
}
}
return lastToken;
}
}
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