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/*
* Copyright 1998-2008 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Sun designates this
* particular file as subject to the "Classpath" exception as provided
* by Sun in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*
*/
package javax.media.j3d;
/**
* The J3dStructure is the super class of all structures in Java 3D.
* A structure is a object that organizes a collection of objects.
*/
abstract class J3dStructure extends Object {
/**
* This is the list of messages to be processed by this structure
*/
UnorderList messageList = new UnorderList(5, J3dMessage.class);
/**
* This is the update Thread for this structure
*/
StructureUpdateThread updateThread = null;
/**
* This is the type of update thread
*/
int threadType = -1;
/**
* The universe of this structure
*/
VirtualUniverse universe = null;
/**
* The thread data for the update thread
*/
J3dThreadData threadData = new J3dThreadData();
/**
* number of messages for this snapshot of time
*/
int nMessage = 0;
J3dMessage[] msgList = new J3dMessage[5];
/**
* This constructor does nothing
*/
J3dStructure(VirtualUniverse u, int type) {
universe = u;
threadType = type;
threadData.threadType = type;
}
/**
* This returns the thread data for this thread.
*/
final J3dThreadData getUpdateThreadData() {
return (threadData);
}
/**
* This adds a message to the list of messages for this structure
*/
final void addMessage(J3dMessage message) {
if (threadData != null) {
threadData.lastUpdateTime = message.time;
} else {
// this force message to consume when initialized
message.time = -1;
}
message.incRefcount();
messageList.add(message);
}
/**
* This returns whether or not there are any pending messages
*/
final J3dMessage[] getMessages(long referenceTime) {
int sz, n = 0;
synchronized (messageList) {
if ((sz = messageList.size()) > 0) {
J3dMessage mess[] = (J3dMessage []) messageList.toArray(false);
for (n = 0; n < sz; n++) {
if (mess[n].time > referenceTime) {
break;
}
}
if (n > 0) {
if (msgList.length < n) {
msgList = new J3dMessage[n];
}
messageList.shift(msgList, n);
}
}
}
nMessage = n;
return msgList;
}
final void clearMessages() {
synchronized (messageList) {
int nmessage = messageList.size();
if (nmessage > 0) {
J3dMessage mess[] = (J3dMessage []) messageList.toArray(false);
for (int i = nmessage-1; i >=0; i--) {
mess[i].decRefcount();
}
messageList.clear();
}
nMessage = 0;
msgList = new J3dMessage[5];
}
}
int getNumMessage() {
return nMessage;
}
/**
* This gets overriden by the structure
*/
abstract void processMessages(long referenceTime);
/**
* This is used by MasterControl to process any unused message
* for final cleanup. DON'T decrememt message count in
* the method, as it is done by MasterControl.
*/
abstract void removeNodes(J3dMessage m);
/**
* Release resource associate with this structure before GC
* We need to clear all those IndexedUnorderSet/WakeupIndexedList
* so that the listIdx associate with IndexedObject reset to -1.
*/
abstract void cleanup();
}
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