/*
* 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.GroupItem;
import com.caucho.relaxng.program.Item;
import com.caucho.util.CharBuffer;
import java.util.ArrayList;
/**
* Relax element pattern
*/
public class GroupPattern extends Pattern {
private ArrayList<Pattern> _patterns = new ArrayList<Pattern>();
/**
* Creates a new element pattern.
*/
public GroupPattern()
{
}
/**
* Returns the Relax schema name.
*/
public String getTagName()
{
return "group";
}
/**
* Returns the number of children.
*/
public int getSize()
{
return _patterns.size();
}
/**
* Returns the n-th child.
*/
public Pattern getChild(int i)
{
return _patterns.get(i);
}
/**
* Adds an element.
*/
public void addChild(Pattern child)
throws RelaxException
{
child.setParent(this);
child.setElementName(getElementName());
if (child instanceof GroupPattern) {
GroupPattern list = (GroupPattern) child;
for (int i = 0; i < list.getSize(); i++)
addChild(list.getChild(i));
return;
}
_patterns.add(child);
boolean hasData = false;
boolean hasElement = false;
for (int i = 0; i < _patterns.size(); i++) {
if (_patterns.get(i).hasData())
hasData = true;
else if (_patterns.get(i).hasElement())
hasElement = true;
}
if (hasData && hasElement)
throw new RelaxException(L.l("<data> may not be in a <group>. Use <text> instead."));
}
/**
* Creates the production item.
*/
public Item createItem(GrammarPattern grammar)
throws RelaxException
{
if (_patterns.size() == 0)
return null;
Item tail = _patterns.get(_patterns.size() - 1).createItem(grammar);
for (int i = _patterns.size() - 2; i >= 0; i--)
tail = GroupItem.create(_patterns.get(i).createItem(grammar), tail);
return tail;
}
/**
* Returns a string for the production.
*/
public String toProduction()
{
if (_patterns.size() == 0)
return "notAllowed";
CharBuffer cb = new CharBuffer();
for (int i = 0; i < _patterns.size(); i++) {
if (i != 0)
cb.append(", ");
Pattern pattern = _patterns.get(i);
if (pattern instanceof ChoicePattern &&
! (((ChoicePattern) pattern).hasEmpty()))
cb.append("(" + _patterns.get(i).toProduction() + ")");
else
cb.append(_patterns.get(i).toProduction());
}
return cb.toString();
}
public boolean equals(Object o)
{
if (this == o)
return true;
if (! (o instanceof GroupPattern))
return false;
GroupPattern group = (GroupPattern) o;
if (_patterns.size() != group._patterns.size())
return false;
for (int i = 0; i < _patterns.size(); i++)
if (! _patterns.get(i).equals(group._patterns.get(i)))
return false;
return true;
}
/**
* Debugging.
*/
public String toString()
{
return "GroupPattern" + _patterns;
}
}