| /******************************************************************************* |
| * Copyright (c) 2007 IBM Corporation and Others |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Hisashi MIYASHITA - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.actf.ai.xmlstore.spi; |
| |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| |
| import org.eclipse.actf.ai.xmlstore.IXMLInfo; |
| import org.eclipse.actf.ai.xmlstore.IXMLSelector; |
| import org.eclipse.actf.ai.xmlstore.IXMLStore; |
| |
| public class XMLStoreAggregator implements IXMLStore { |
| private final ArrayList<IXMLStore> stores; |
| |
| public IXMLStore specify(IXMLSelector selector) { |
| int len = stores.size(); |
| ArrayList<IXMLStore> newStores = new ArrayList<IXMLStore>(len); |
| for (int i = 0; i < len; i++) { |
| IXMLStore st = stores.get(i); |
| IXMLStore st2 = st.specify(selector); |
| if (st2 != null) { |
| newStores.add(st2); |
| } |
| } |
| if (newStores.size() > 0) { |
| return new XMLStoreAggregator(newStores); |
| } else { |
| return null; |
| } |
| } |
| |
| public void refleshAll() { |
| int len = stores.size(); |
| for (int i = 0; i < len; i++) { |
| IXMLStore st = stores.get(i); |
| st.refleshAll(); |
| } |
| } |
| |
| public void addStore(IXMLStore store) { |
| stores.add(store); |
| } |
| |
| private XMLStoreAggregator(ArrayList<IXMLStore> stores) { |
| this.stores = stores; |
| } |
| |
| XMLStoreAggregator() { |
| this.stores = new ArrayList<IXMLStore>(); |
| } |
| |
| private class AggregatorIterator implements Iterator<IXMLInfo> { |
| private int idx; |
| private Iterator<IXMLInfo> currentIterator; |
| private IXMLInfo next; |
| |
| private void setNext(){ |
| if (currentIterator != null) { |
| if (currentIterator.hasNext()){ |
| this.next = currentIterator.next(); |
| return; |
| } |
| } |
| |
| int size = stores.size(); |
| if (idx < size) { |
| IXMLStore store = stores.get(idx); |
| currentIterator = store.getInfoIterator(); |
| idx++; |
| setNext(); |
| return; |
| } |
| this.next = null; |
| return; |
| } |
| |
| |
| AggregatorIterator() { |
| this.idx = 0; |
| setNext(); |
| } |
| |
| public boolean hasNext() { |
| return (next != null); |
| } |
| |
| public IXMLInfo next() { |
| IXMLInfo ret = next; |
| setNext(); |
| return ret; |
| } |
| |
| public void remove() { |
| // Do nothing; |
| } |
| } |
| |
| public Iterator<IXMLInfo> getInfoIterator() { |
| return new AggregatorIterator(); |
| } |
| |
| } |