Java tutorial
/* * blue - object composition environment for csound * Copyright (c) 2000-2005 Steven Yi (stevenyi@gmail.com) * * This program 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. * * This program 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 this program; see the file COPYING.LIB. If not, write to * the Free Software Foundation Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307 USA */ package blue.mixer; import blue.automation.Automatable; import blue.automation.AutomatableCollectionListener; import blue.utility.ListUtil; import electric.xml.Element; import electric.xml.Elements; import java.beans.PropertyChangeEvent; import java.beans.PropertyChangeListener; import java.io.Serializable; import java.util.ArrayList; import java.util.Iterator; import java.util.Vector; import javax.swing.ListModel; import javax.swing.event.ListDataEvent; import javax.swing.event.ListDataListener; import org.apache.commons.lang3.builder.EqualsBuilder; import org.apache.commons.lang3.builder.ToStringBuilder; public class EffectsChain implements Serializable, ListModel, PropertyChangeListener { private ArrayList effects = new ArrayList(); private transient Vector listeners = null; private transient Vector automatableCollectionListeners = null; public Element saveAsXML() { Element retVal = new Element("effectsChain"); for (Iterator it = effects.iterator(); it.hasNext();) { Object obj = it.next(); if (obj instanceof Effect) { Effect elem = (Effect) obj; retVal.addElement(elem.saveAsXML()); } else if (obj instanceof Send) { Send send = (Send) obj; retVal.addElement(send.saveAsXML()); } } return retVal; } public static EffectsChain loadFromXML(Element data) throws Exception { EffectsChain chain = new EffectsChain(); Elements nodes = data.getElements(); while (nodes.hasMoreElements()) { Element node = nodes.next(); String nodeName = node.getName(); if (nodeName.equals("effect")) { chain.addEffect(Effect.loadFromXML(node)); } else if (nodeName.equals("send")) { chain.addSend(Send.loadFromXML(node)); } } return chain; } public void addEffect(Effect effect) { effects.add(effect); int val = effects.indexOf(effect); ListDataEvent lde = new ListDataEvent(this, ListDataEvent.INTERVAL_ADDED, val, val); fireAddDataEvent(lde); fireAutomatableAdded(effect); } public void addSend(Send send) { effects.add(send); int val = effects.indexOf(send); ListDataEvent lde = new ListDataEvent(this, ListDataEvent.INTERVAL_ADDED, val, val); fireAddDataEvent(lde); fireAutomatableAdded(send); send.addPropertyChangeListener(this); } public Object removeElementAt(int index) { Object obj = effects.remove(index); if (obj instanceof Send) { ((Send) obj).removePropertyChangeListener(this); } ListDataEvent lde = new ListDataEvent(this, ListDataEvent.INTERVAL_REMOVED, index, index); fireRemoveDataEvent(lde); fireAutomatableRemoved((Automatable) obj); return obj; } public int size() { return effects.size(); } public boolean equals(Object obj) { return EqualsBuilder.reflectionEquals(this, obj); } public void pushUp(int index) { if (index > 0 && index < size()) { Object a = effects.remove(index - 1); effects.add(index, a); ListDataEvent lde = new ListDataEvent(this, ListDataEvent.CONTENTS_CHANGED, index - 1, index); fireContentsChangedEvent(lde); } } public void pushDown(int index) { if (index < size() - 1) { Object a = effects.remove(index + 1); effects.add(index, a); ListDataEvent lde = new ListDataEvent(this, ListDataEvent.CONTENTS_CHANGED, index - 1, index); fireContentsChangedEvent(lde); } } public Send[] getSends() { ArrayList<Send> temp = new ArrayList<Send>(); for (int i = 0; i < this.size(); i++) { Object obj = this.getElementAt(i); if (obj instanceof Send) { temp.add((Send) obj); } } Send[] sends = new Send[temp.size()]; sends = temp.toArray(sends); return sends; } /* List Model Methods */ public int getSize() { return effects.size(); } public Object getElementAt(int index) { return effects.get(index); } public void addListDataListener(ListDataListener l) { if (listeners == null) { listeners = new Vector(); } listeners.add(l); } public void removeListDataListener(ListDataListener l) { if (listeners != null) { listeners.remove(l); } } private void fireAddDataEvent(ListDataEvent lde) { if (listeners == null) { return; } for (Iterator iter = listeners.iterator(); iter.hasNext();) { ListDataListener listener = (ListDataListener) iter.next(); listener.intervalAdded(lde); } } private void fireRemoveDataEvent(ListDataEvent lde) { if (listeners == null) { return; } for (Iterator iter = listeners.iterator(); iter.hasNext();) { ListDataListener listener = (ListDataListener) iter.next(); listener.intervalRemoved(lde); } } private void fireContentsChangedEvent(ListDataEvent lde) { if (listeners == null) { return; } for (Iterator iter = listeners.iterator(); iter.hasNext();) { ListDataListener listener = (ListDataListener) iter.next(); listener.contentsChanged(lde); } } public String toString() { return ToStringBuilder.reflectionToString(this); } public void addAutomatableCollectionListener(AutomatableCollectionListener listener) { if (automatableCollectionListeners == null) { automatableCollectionListeners = new Vector(); } automatableCollectionListeners.add(listener); } public void removeAutomatableCollectionListener(AutomatableCollectionListener listener) { if (automatableCollectionListeners != null) { automatableCollectionListeners.remove(listener); } } private void fireAutomatableAdded(Automatable automatable) { if (automatableCollectionListeners != null) { Iterator iter = new Vector(automatableCollectionListeners).iterator(); while (iter.hasNext()) { AutomatableCollectionListener listener = (AutomatableCollectionListener) iter.next(); listener.automatableAdded(automatable); } } } private void fireAutomatableRemoved(Automatable automatable) { if (automatableCollectionListeners != null) { Iterator iter = new Vector(automatableCollectionListeners).iterator(); while (iter.hasNext()) { AutomatableCollectionListener listener = (AutomatableCollectionListener) iter.next(); listener.automatableRemoved(automatable); } } } public void propertyChange(PropertyChangeEvent evt) { if (evt.getPropertyName().equals("sendChannel")) { Object obj = evt.getSource(); int index = ListUtil.indexOfByRef(effects, obj); if (index >= 0) { ListDataEvent lde = new ListDataEvent(this, ListDataEvent.CONTENTS_CHANGED, index, index); fireContentsChangedEvent(lde); } } } }