question: private boolean matchesExpression ( String toSearch , String expression ) { if ( toSearch == null || expression == null ) { return false ; } int toSearchIndex = 0 ; int exprIndex = 0 ; while ( ( exprIndex < expression . length ( ) ) && ( toSearchIndex < toSearch . length ( ) ) ) { if ( expression . charAt ( exprIndex ) == CHAR_MATCH_ESCAPE ) { exprIndex ++ ; if ( exprIndex == expression . length ( ) ) { return false ; } if ( expression . charAt ( exprIndex ) == toSearch . charAt ( toSearchIndex ) ) { exprIndex ++ ; toSearchIndex ++ ; } else { return false ; } } else if ( expression . charAt ( exprIndex ) == CHAR_MATCH_MANY ) { String partExpr = expression . substring ( exprIndex + 1 ) ; for ( int j = toSearchIndex ; j <= toSearch . length ( ) ; j ++ ) { if ( matchesExpression ( toSearch . substring ( j ) , partExpr ) ) { return true ; } } return false ; } else if ( expression . charAt ( exprIndex ) == CHAR_MATCH_ONE ) { return matchesExpression ( toSearch . substring ( toSearchIndex + 1 ) , expression . substring ( exprIndex + 1 ) ) ; } else if ( toSearch . charAt ( toSearchIndex ) == expression . charAt ( exprIndex ) ) { toSearchIndex ++ ; exprIndex ++ ; } else { return false ; } } for ( int i = exprIndex ; i < expression . length ( ) ; i ++ ) { if ( expression . charAt ( i ) != CHAR_MATCH_MANY ) { break ; } exprIndex ++ ; } return ( ( toSearch . length ( ) == toSearchIndex ) && ( expression . length ( ) == exprIndex ) ) ; }
target:  Checks if the toSearch string matches the given expression.