/*
BEGIN LICENSE BLOCK
Copyright 2010-2011, Heiko Mueller, Sam Lindley, James Cheney and
University of Edinburgh
This file is part of Database Wiki.
Database Wiki 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 3 of the License, or
(at your option) any later version.
Database Wiki 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. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Database Wiki. If not, see <http://www.gnu.org/licenses/>.
END LICENSE BLOCK
*/
package org.dbwiki.data.schema;
import java.util.Hashtable;
import java.util.Vector;
import org.dbwiki.exception.data.WikiSchemaException;
/** A list of entities, with a map from schema node names to their values.
* Used in GroupSchemaNode for children.
* @author jcheney
*
*/
public class SchemaNodeList {
/*
* Private Variables
*/
private Vector<SchemaNode> _schemaNodeList;
private Hashtable<String, SchemaNode> _schemaNodeIndex;
private boolean _hasAttributes;
private boolean _hasElements;
/*
* Constructors
*/
public SchemaNodeList() {
_schemaNodeList = new Vector<SchemaNode>();
_schemaNodeIndex = new Hashtable<String, SchemaNode>();
_hasAttributes = false;
_hasElements = false;
}
/*
* Public Methods
*/
public void add(SchemaNode schema) throws org.dbwiki.exception.WikiException {
String key = schema.label();
if (!_schemaNodeIndex.containsKey(key)) {
_schemaNodeList.add(schema);
_schemaNodeIndex.put(key, schema);
if (schema.isAttribute()) {
_hasAttributes = true;
} else {
_hasElements = true;
}
} else {
throw new WikiSchemaException(WikiSchemaException.DuplicateSchemaNode, key);
}
}
public SchemaNode get(int index) {
return _schemaNodeList.get(index);
}
public SchemaNode get(String name) {
if (_schemaNodeIndex.containsKey(name)) {
return _schemaNodeIndex.get(name);
} else {
return null;
}
}
public boolean hasAttributes() {
return _hasAttributes;
}
public boolean hasElements() {
return _hasElements;
}
public int size() {
return _schemaNodeList.size();
}
}