/*
* Copyright 2000-2001,2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.jetspeed.om.registry.base;
import java.util.Iterator;
import java.util.SortedMap;
import java.util.HashMap;
import java.util.NoSuchElementException;
import java.lang.UnsupportedOperationException;
import java.lang.IllegalStateException;
import org.apache.jetspeed.om.registry.*;
/**
* CategoryIterator - iterators over category treemap/hashmap allowing dups
*
*
* @author <a href="mailto:taylor@apache.org">David Sean Taylor</a>
* @version $Id: CategoryIterator.java,v 1.3 2004/02/23 03:08:26 jford Exp $
*/
public class CategoryIterator implements Iterator
{
protected SortedMap map = null;
protected String key;
protected Iterator mapIterator = null;
protected Iterator bucketIterator = null;
protected boolean iteratingMaps = true;
protected HashMap bucket = null;
protected PortletEntry portlet = null;
protected boolean findall = false;
protected String category = "";
protected String group = "";
public String getCategory()
{
return category;
}
public String getGroup()
{
return group;
}
public CategoryIterator(SortedMap map, String key)
{
this.map = map;
this.key = key;
findall = (this.key == null || this.key.equals(""));
if (findall)
this.map = map;
else
this.map = map.tailMap(key);
this.mapIterator = this.map.entrySet().iterator();
this.bucketIterator = null;
this.bucket = null;
}
private CategoryIterator()
{}
public boolean hasNext()
{
if (iteratingMaps)
{
if (mapIterator.hasNext() == false)
return false;
return filter();
}
if (bucketIterator.hasNext())
return getPortletEntry();
// reached end of bucket, try next map
if (mapIterator.hasNext())
{
return filter();
}
return false; //reached end of maps
}
protected boolean filter()
{
java.util.Map.Entry entry = (java.util.Map.Entry)mapIterator.next();
String entryKey = (String)entry.getKey();
int pos = entryKey.indexOf('.');
this.category = "";
if (-1 == pos)
{
this.group = entryKey;
}
else
{
this.group = entryKey.substring(0, pos);
int length = entryKey.length();
if (length > pos + 1)
this.category = entryKey.substring(pos + 1, length);
}
if (!findall && !entryKey.startsWith(this.key))
return false; // end of criteria
bucket = (HashMap)entry.getValue();
bucketIterator = bucket.entrySet().iterator();
iteratingMaps = false;
if (bucketIterator.hasNext() == false)
return false;
return getPortletEntry();
}
protected boolean getPortletEntry()
{
java.util.Map.Entry entry = (java.util.Map.Entry)bucketIterator.next();
if (null == entry)
return false;
this.portlet = (PortletEntry)entry.getValue();
return true;
}
public void remove() throws IllegalStateException, UnsupportedOperationException
{
throw new UnsupportedOperationException("The remove() method is not supported");
}
public Object next() throws NoSuchElementException
{
return portlet;
}
}