/*
* Copyright (c) 1998-2010 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.pattern;
import com.caucho.relaxng.RelaxException;
import com.caucho.relaxng.program.ElementItem;
import com.caucho.relaxng.program.Item;
/**
* Relax element pattern
*/
public class ElementPattern extends Pattern {
private String _defName;
private NameClassPattern _name;
//private GroupPattern _children = new GroupPattern();
private Pattern _children;
private Item _item;
/**
* Creates a new element pattern.
*/
public ElementPattern(String defName)
{
_defName = defName;
}
/**
* Returns the Relax schema name.
*/
public String getTagName()
{
return "element";
}
/**
* Returns the definition name.
*/
public String getDefName()
{
return _defName;
}
/**
* Returns the children pattern.
*/
/*
public GroupPattern getChildren()
{
return _children;
}
*/
/**
* Returns true if it contains an element.
*/
public boolean hasElement()
{
return true;
}
/**
* Adds an element.
*/
public void addNameChild(NameClassPattern child)
throws RelaxException
{
_name = child;
setElementName(_name.toProduction());
}
/**
* Adds an element.
*/
public NameClassPattern getNameChild()
throws RelaxException
{
return _name;
}
/**
* Adds an element.
*/
public void addChild(Pattern child)
throws RelaxException
{
if (_name == null)
throw new RelaxException(L.l("<element> must have <name> definitions before other children."));
child.setParent(_children);
// XXX: (group always null?)
// child.setElementName(_children.getElementName());
if (_children == null)
_children = child;
else if (_children instanceof GroupPattern) {
GroupPattern group = (GroupPattern) _children;
group.addChild(child);
}
else {
GroupPattern group = new GroupPattern();
group.addChild(_children);
group.addChild(child);
_children = group;
}
}
/**
* Ends the element.
*/
public void endElement()
throws RelaxException
{
if (_name == null)
throw new RelaxException(L.l("<element> must have a <name> definition."));
if (_children == null)
throw new RelaxException(L.l("<element> tag '{0}' must have a child grammar production.",
_name.toProduction()));
}
/**
* Creates the item, i.e. program
*/
public Item createItem(GrammarPattern grammar)
throws RelaxException
{
if (_item == null) {
ElementItem item = new ElementItem(this, _name.createNameItem());
_item = item;
item.setChildrenItem(_children.createItem(grammar));
}
return _item;
}
/**
* Returns a string for the production.
*/
public String toProduction()
{
return _name.toProduction();
}
public boolean equals(Object o)
{
if (this == o)
return true;
if (! (o instanceof ElementPattern))
return false;
ElementPattern elt = (ElementPattern) o;
return _defName.equals(elt._defName);
}
/**
* Debugging.
*/
public String toString()
{
return getClass().getSimpleName() + "[" + _name + "]";
}
}