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A PHP engine implemented in 100% Java
/*
* Copyright (c) 1998-2012 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.relaxng.program;
import com.caucho.relaxng.RelaxException;
import com.caucho.util.L10N;
import com.caucho.xml.QName;
import java.util.HashSet;
import java.util.Iterator;
/**
* Represents a match inside an element with a continuation.
*
* In the following example, the "c, d" would be eltItem and "e"
* would be the contItem.
*
* a { b . c, d } e
*/
public class InElementItem extends Item {
protected final static L10N L = new L10N(InElementItem.class);
private final Item _eltItem;
private final Item _contItem;
private int _hashCode;
private InElementItem(Item eltItem, Item contItem)
{
_eltItem = eltItem;
_contItem = contItem;
}
public static InElementItem create(Item eltItem, Item contItem)
{
if (eltItem == null)
return null;
else if (contItem == null)
return null;
else
return new InElementItem(eltItem, contItem);
}
public Item getFirst()
{
return _eltItem;
}
public Item getSecond()
{
return _contItem;
}
public Item getElementItem()
{
return _eltItem;
}
public Item getContinuationItem()
{
return _contItem;
}
/**
* Interleaves a continuation.
*/
@Override
public Item interleaveContinuation(Item cont)
{
return create(_eltItem, InterleaveItem.create(cont, _contItem));
}
/**
* Adds a continuation
*/
@Override
public Item inElementContinuation(Item cont)
{
return create(_eltItem, create(_contItem, cont));
}
/**
* Adds a continuation
*/
public Item groupContinuation(Item cont)
{
return create(_eltItem, GroupItem.create(_contItem, cont));
}
/**
* Returns the first set, the set of element names possible.
*/
public void firstSet(HashSet set)
{
_eltItem.firstSet(set);
}
/**
* Returns the first set, the set of element names possible.
*/
public void requiredFirstSet(HashSet set)
{
_eltItem.requiredFirstSet(set);
}
/**
* Allows empty if both allow empty.
*/
public boolean allowEmpty()
{
return _eltItem.allowEmpty();
}
/**
* Return all possible child items or null
*/
public Iterator- getItemsIterator()
{
return itemIterator( _eltItem );
}
/**
* Returns the next item when an element of the given name is returned
*
* @param name the name of the element
*
* @return the program for handling the element
*/
public Item startElement(QName name)
throws RelaxException
{
Item nextElt = _eltItem.startElement(name);
if (nextElt == null)
return null;
else if (nextElt == _eltItem)
return this;
else
return nextElt.inElementContinuation(_contItem);
}
/**
* Returns the next item when some text data is available.
*
* @param string the text data
*
* @return the program for handling the element
*/
@Override
public Item text(CharSequence string)
throws RelaxException
{
Item nextElt = _eltItem.text(string);
if (nextElt == null)
return null;
else if (nextElt == _eltItem)
return this;
else
return create(nextElt, _contItem);
}
/**
* Returns the first set, the set of attribute names possible.
*/
public void attributeSet(HashSet
set)
{
_eltItem.attributeSet(set);
}
/**
* Sets an attribute.
*
* @param name the name of the attribute
* @param value the value of the attribute
*
* @return the program for handling the element
*/
public boolean allowAttribute(QName name, String value)
throws RelaxException
{
return _eltItem.allowAttribute(name, value);
}
/**
* Sets an attribute.
*
* @param name the name of the attribute
* @param value the value of the attribute
*
* @return the program for handling the element
*/
public Item setAttribute(QName name, String value)
throws RelaxException
{
Item nextElt = _eltItem.setAttribute(name, value);
if (nextElt == null)
return create(EmptyItem.create(), _contItem);
else if (nextElt == _eltItem)
return this;
else
return create(nextElt, _contItem);
}
/**
* Returns true if the element is allowed to end here.
*/
public Item attributeEnd()
{
Item nextElt = _eltItem.attributeEnd();
if (nextElt == null) {
return null;
}
else if (nextElt == _eltItem)
return this;
else
return create(nextElt, _contItem);
}
/**
* Returns the next item when the element is completes.
*
* @return the program for handling the element
*/
public Item endElement()
throws RelaxException
{
if (_eltItem.allowEmpty())
return _contItem;
else
return null;
}
/**
* Returns true if the element is allowed somewhere in the item.
* allowsElement is used for error messages to give more information
* in cases of order dependency.
*
* @param name the name of the element
*
* @return true if the element is allowed somewhere
*/
public boolean allowsElement(QName name)
{
return _eltItem.allowsElement(name);
}
/**
* Returns the pretty printed syntax.
*/
public String toSyntaxDescription(int depth)
{
return _eltItem.toSyntaxDescription(depth);
}
/**
* Returns true if the syntax description is simple
*/
public boolean isSimpleSyntax()
{
return _eltItem.isSimpleSyntax();
}
/**
* Returns the hash code for the empty item.
*/
public int hashCode()
{
if (_hashCode == 0)
_hashCode = calculateHashCode();
return _hashCode;
}
/**
* Returns the hash code for the empty item.
*/
private int calculateHashCode()
{
return _eltItem.hashCode() * 65521 + _contItem.hashCode();
}
/**
* Returns true if the object is an empty item.
*/
public boolean equals(Object o)
{
if (this == o)
return true;
if (! (o instanceof InElementItem))
return false;
InElementItem seq = (InElementItem) o;
return _eltItem.equals(seq._eltItem) && _contItem.equals(seq._contItem);
}
public String toString()
{
return "InElementItem[" + _eltItem + ",cont=" + _contItem + "]";
}
}