svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.library / org.gvsig.ui / src / main / java / org / gvsig / gui / beans / panelGroup / PanelGroupManager.java @ 40561
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/**
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* gvSIG. Desktop Geographic Information System.
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*
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* Copyright (C) 2007-2013 gvSIG Association.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 3
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*
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* For any additional information, do not hesitate to contact us
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* at info AT gvsig.com, or visit our website www.gvsig.com.
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*/
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package org.gvsig.gui.beans.panelGroup; |
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import java.io.Serializable; |
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import java.util.ArrayList; |
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import org.gvsig.gui.beans.panelGroup.panels.AbstractPanel; |
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/**
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* <p>Implemented to use the {@link AbstractPanelGroup AbstractPanelGroup} type desired.</p>
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* <p>This class allows having different implementations of {@link AbstractPanelGroup AbstractPanelGroup}
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* and only load in memory the class of some of them, whom have previously been imported to future use. Then, when
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* a graphical interface would need use a <code>AbstractPanelGroup</code> instance, will instance an object of the
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* class <i>selected</i> (set previously as <i>default</i>) of the registered types in this manager.</p>
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*
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* @version 18/10/2007
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* @author Pablo Piqueras Bartolom? (pablo.piqueras@iver.es)
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*/
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public class PanelGroupManager implements Serializable { |
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private static final long serialVersionUID = 2059085515913026734L; |
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/**
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* Array list with the {@link AbstractPanelGroup AbstractPanelGroup} registered.
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*
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* @see #registerPanelGroup(Class)
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* @see #deregisterPanelGroup(Class)
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*/
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private ArrayList<Class> registeredPanelGroups = null; |
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/**
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* The {@link AbstractPanelGroup AbstractPanelGroup} type set as default.
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*
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* @see #getPanelGroup()
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* @see #setDefaultType(Class)
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*/
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private Class defaultPanelGroup = null; |
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/**
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* <p>Reference to the current manager with the <i>PanelGroup</i> registered.</p>
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*/
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private static PanelGroupManager manager = null; |
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/**
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* <p>Default constructor.</p>
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*/
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protected PanelGroupManager() {
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registeredPanelGroups = new ArrayList<Class>(); |
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} |
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/**
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* <p>The singleton <code>PanelGroupManager</code> instance.</p>
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*
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* @return current manager used, or if didn't exist any, a new one
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*/
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public static synchronized PanelGroupManager getManager() |
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{ |
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if( manager == null ) { |
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manager = new PanelGroupManager ();
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} |
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return manager;
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} |
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/**
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* <p>Registers a new {@link AbstractPanelGroup AbstractPanelGroup} class type if it
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* wasn't already done.</p>
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*
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* @param panelGroup the new <code>AbstractPanelGroup</code> class type to register
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*
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* @see #deregisterPanelGroup(Class)
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*/
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public synchronized void registerPanelGroup(Class panelGroup) { |
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// Only adds if isn't already registered
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if (!registeredPanelGroups.contains(panelGroup))
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registeredPanelGroups.add(panelGroup); |
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} |
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/**
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* <p>Unregisters a {@link AbstractPanelGroup AbstractPanelGroup} class type if it
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* was previously registered.</p>
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* <p>If the type to unregister is the <i>default</i>, sets <i>default</i> to <code>null</code>.</p>
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*
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* @param panelGroup the <code>AbstractPanelGroup</code> class type to unregister
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*
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* @see #registerPanelGroup(Class)
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*/
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public synchronized void deregisterPanelGroup(Class panelGroup) { |
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// Only removes if already registered
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if (registeredPanelGroups.contains(panelGroup)) {
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registeredPanelGroups.remove(panelGroup); |
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if (defaultPanelGroup == null) |
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return;
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if (defaultPanelGroup.equals(panelGroup)) {
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defaultPanelGroup = null;
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} |
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} |
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} |
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/**
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* <p>Sets as <i>default</i> one of the {@link AbstractPanelGroup AbstractPanelGroup} class type
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* previously registered.</p>
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*
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* @param panelGroup a <code>AbstractPanelGroup</code> class type
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*
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* @see #getPanelGroup()
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*/
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public synchronized void setDefaultType(Class panelGroup) { |
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if (registeredPanelGroups.contains(panelGroup))
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defaultPanelGroup = panelGroup; |
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} |
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/**
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* <p>Gets the <i>default</i> {@link AbstractPanelGroup AbstractPanelGroup} class type.</p>
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*
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* return the <i>default</i> <code>AbstractPanelGroup</code> class type or <code>null</code> if isn't any
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*
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* @throws Exception any exception produced loading the {@link AbstractPanel AbstractPanel}
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*
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* @see #setDefaultType(Class)
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*/
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public synchronized AbstractPanelGroup getPanelGroup(Object reference) throws Exception { |
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try {
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if( defaultPanelGroup != null ) { |
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return (AbstractPanelGroup) defaultPanelGroup.getConstructor(Object.class).newInstance(reference); |
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} |
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} |
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catch (Exception e) { |
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throw e;
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} |
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return null; |
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} |
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} |