/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source 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, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
* Free SoftwareFoundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.jstl.rt;
import com.caucho.util.CharBuffer;
import com.caucho.util.L10N;
import com.caucho.jsp.JspUtil;
import javax.servlet.jsp.JspTagException;
import javax.servlet.jsp.jstl.core.LoopTagSupport;
import javax.el.ELContext;
import javax.el.ValueExpression;
import java.util.Iterator;
public class CoreForTokensTag extends LoopTagSupport {
private static L10N L = new L10N(CoreForTokensTag.class);
protected String _items;
protected String _delims;
protected Iterator _iterator;
/**
* Sets the collection expression.
*/
public void setItems(String items)
{
_items = items;
}
/**
* Sets the delimiters expression.
*/
public void setDelims(String delims)
{
_delims = delims;
}
@Override
protected String getDelims()
{
return _delims;
}
protected ValueExpression createIndexedExpression(int index)
throws JspTagException
{
return CoreForEachTag.getExpr(deferredExpression,
index,
_items,
_delims);
}
/**
* Sets the beginning value
*/
public void setBegin(int begin)
{
this.begin = begin;
this.beginSpecified = true;
}
/**
* Sets the ending value
*/
public void setEnd(int end)
{
this.end = end;
this.endSpecified = true;
}
/**
* Sets the step value
*/
public void setStep(int step)
{
this.step = step;
this.stepSpecified = true;
}
/**
* Prepares the iterator.
*/
public void prepare()
throws JspTagException
{
// jsp/1ce6
if (_items != null && _items.contains("#{")) {
ELContext elContext = pageContext.getELContext();
deferredExpression
= JspUtil.createValueExpression(elContext, String.class, _items);
_items = (String) deferredExpression.getValue(elContext);
}
_iterator = new TokenIterator(_items, _delims);
}
/**
* Returns true if there are more items.
*/
public boolean hasNext()
{
return _iterator.hasNext();
}
/**
* Returns the next item
*/
public Object next()
{
return _iterator.next();
}
public static class TokenIterator implements Iterator {
private String _value;
private char []_delims;
private int _length;
private int _i;
private CharBuffer _cb = new CharBuffer();
TokenIterator(String value, String delims)
{
if (value == null)
value = "";
_value = value;
if (delims != null)
_delims = delims.toCharArray();
else
_delims = new char[0];
_length = value.length();
char ch;
final int startDelims = _delims.length - 1;
for (_i = 0; _i < _length; _i++) {
ch = _value.charAt(_i);
boolean isDelim = false;
for (int j = startDelims; j >= 0; j--) {
if (_delims[j] == ch) {
isDelim = true;
break;
}
}
if (! isDelim)
break;
}
}
public boolean hasNext()
{
return _i < _length;
}
public Object next()
{
_cb.clear();
char ch;
final int startDelims = _delims.length - 1;
loop:
for (; _i < _length; _i++) {
ch = _value.charAt(_i);
for (int j = startDelims; j >= 0; j--) {
if (_delims[j] == ch)
break loop;
}
_cb.append(ch);
}
for (_i++; _i < _length; _i++) {
ch = _value.charAt(_i);
boolean hasDelim = false;
for (int j = startDelims; j >= 0; j--) {
if (_delims[j] == ch) {
hasDelim = true;
break;
}
}
if (! hasDelim)
return _cb.toString();
}
return _cb.toString();
}
public void remove()
{
throw new UnsupportedOperationException();
}
}
}