package org.pdf4j.saxon.dotnet;
import cli.System.Collections.IEnumerator;
import cli.System.Text.RegularExpressions.Match;
import cli.System.Text.RegularExpressions.Regex;
import org.pdf4j.saxon.om.Item;
import org.pdf4j.saxon.om.SequenceIterator;
import org.pdf4j.saxon.value.StringValue;
/**
* A DotNetTokenIterator is an iterator over the strings that result from tokenizing
* a string using a regular expression
*/
public class DotNetTokenIterator implements SequenceIterator {
private String input;
private Regex pattern;
private IEnumerator matches;
private CharSequence current;
private int position = 0;
private int prevEnd = 0;
/**
* Construct a JTokenIterator.
*/
public DotNetTokenIterator (CharSequence input, Regex pattern) {
this.input = input.toString();
this.pattern = pattern;
matches = pattern.Matches(this.input).GetEnumerator();
prevEnd = 0;
}
public Item next() {
if (prevEnd < 0) {
current = null;
position = -1;
return null;
}
if (matches.MoveNext()) {
Match match = (Match)matches.get_Current();
current = input.subSequence(prevEnd, match.get_Index());
prevEnd = match.get_Index() + match.get_Length();
} else {
current = input.subSequence(prevEnd, input.length());
prevEnd = -1;
}
position++;
return StringValue.makeStringValue(current);
}
public Item current() {
return (current==null ? null : StringValue.makeStringValue(current));
}
public int position() {
return position;
}
public void close() {
}
public SequenceIterator getAnother() {
return new DotNetTokenIterator(input, pattern);
}
/**
* Get properties of this iterator, as a bit-significant integer.
*
* @return the properties of this iterator. This will be some combination of
* properties such as {@link GROUNDED}, {@link LAST_POSITION_FINDER},
* and {@link LOOKAHEAD}. It is always
* acceptable to return the value zero, indicating that there are no known special properties.
* It is acceptable for the properties of the iterator to change depending on its state.
*/
public int getProperties() {
return 0;
}
}
//
// The contents of this file are subject to the Mozilla Public License Version 1.0 (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.mozilla.org/MPL/
//
// Software distributed under the License is distributed on an "AS IS" basis,
// WITHOUT WARRANTY OF ANY KIND, either express or implied.
// See the License for the specific language governing rights and limitations under the License.
//
// The Original Code is: all this file.
//
// The Initial Developer of the Original Code is Michael H. Kay
//
// Portions created by (your name) are Copyright (C) (your legal entity). All Rights Reserved.
//
// Contributor(s): none.
//