abstractdataset.html

jfreechart最新源代码

<FONT color="green">154</FONT>        <a name="line.154"></a>
<FONT color="green">155</FONT>        /**<a name="line.155"></a>
<FONT color="green">156</FONT>         * Notifies all registered listeners that the dataset has changed.<a name="line.156"></a>
<FONT color="green">157</FONT>         */<a name="line.157"></a>
<FONT color="green">158</FONT>        protected void fireDatasetChanged() {<a name="line.158"></a>
<FONT color="green">159</FONT>            notifyListeners(new DatasetChangeEvent(this, this));<a name="line.159"></a>
<FONT color="green">160</FONT>        }<a name="line.160"></a>
<FONT color="green">161</FONT>    <a name="line.161"></a>
<FONT color="green">162</FONT>        /**<a name="line.162"></a>
<FONT color="green">163</FONT>         * Notifies all registered listeners that the dataset has changed.<a name="line.163"></a>
<FONT color="green">164</FONT>         *<a name="line.164"></a>
<FONT color="green">165</FONT>         * @param event  contains information about the event that triggered the <a name="line.165"></a>
<FONT color="green">166</FONT>         *               notification.<a name="line.166"></a>
<FONT color="green">167</FONT>         */<a name="line.167"></a>
<FONT color="green">168</FONT>        protected void notifyListeners(DatasetChangeEvent event) {<a name="line.168"></a>
<FONT color="green">169</FONT>    <a name="line.169"></a>
<FONT color="green">170</FONT>            Object[] listeners = this.listenerList.getListenerList();<a name="line.170"></a>
<FONT color="green">171</FONT>            for (int i = listeners.length - 2; i &gt;= 0; i -= 2) {<a name="line.171"></a>
<FONT color="green">172</FONT>                if (listeners[i] == DatasetChangeListener.class) {<a name="line.172"></a>
<FONT color="green">173</FONT>                    ((DatasetChangeListener) listeners[i + 1]).datasetChanged(<a name="line.173"></a>
<FONT color="green">174</FONT>                        event<a name="line.174"></a>
<FONT color="green">175</FONT>                    );<a name="line.175"></a>
<FONT color="green">176</FONT>                }<a name="line.176"></a>
<FONT color="green">177</FONT>            }<a name="line.177"></a>
<FONT color="green">178</FONT>    <a name="line.178"></a>
<FONT color="green">179</FONT>        }<a name="line.179"></a>
<FONT color="green">180</FONT>    <a name="line.180"></a>
<FONT color="green">181</FONT>        /**<a name="line.181"></a>
<FONT color="green">182</FONT>         * Returns a clone of the dataset. The cloned dataset will NOT include the <a name="line.182"></a>
<FONT color="green">183</FONT>         * {@link DatasetChangeListener} references that have been registered with <a name="line.183"></a>
<FONT color="green">184</FONT>         * this dataset.<a name="line.184"></a>
<FONT color="green">185</FONT>         * <a name="line.185"></a>
<FONT color="green">186</FONT>         * @return A clone.<a name="line.186"></a>
<FONT color="green">187</FONT>         * <a name="line.187"></a>
<FONT color="green">188</FONT>         * @throws CloneNotSupportedException  if the dataset does not support <a name="line.188"></a>
<FONT color="green">189</FONT>         *                                     cloning.<a name="line.189"></a>
<FONT color="green">190</FONT>         */<a name="line.190"></a>
<FONT color="green">191</FONT>        public Object clone() throws CloneNotSupportedException {<a name="line.191"></a>
<FONT color="green">192</FONT>            AbstractDataset clone = (AbstractDataset) super.clone();<a name="line.192"></a>
<FONT color="green">193</FONT>            clone.listenerList = new EventListenerList();<a name="line.193"></a>
<FONT color="green">194</FONT>            return clone;    <a name="line.194"></a>
<FONT color="green">195</FONT>        }<a name="line.195"></a>
<FONT color="green">196</FONT>        <a name="line.196"></a>
<FONT color="green">197</FONT>        /**<a name="line.197"></a>
<FONT color="green">198</FONT>         * Handles serialization.<a name="line.198"></a>
<FONT color="green">199</FONT>         *<a name="line.199"></a>
<FONT color="green">200</FONT>         * @param stream  the output stream.<a name="line.200"></a>
<FONT color="green">201</FONT>         *<a name="line.201"></a>
<FONT color="green">202</FONT>         * @throws IOException if there is an I/O problem.<a name="line.202"></a>
<FONT color="green">203</FONT>         */<a name="line.203"></a>
<FONT color="green">204</FONT>        private void writeObject(ObjectOutputStream stream) throws IOException {<a name="line.204"></a>
<FONT color="green">205</FONT>            stream.defaultWriteObject();<a name="line.205"></a>
<FONT color="green">206</FONT>        }<a name="line.206"></a>
<FONT color="green">207</FONT>    <a name="line.207"></a>
<FONT color="green">208</FONT>        /**<a name="line.208"></a>
<FONT color="green">209</FONT>         * Restores a serialized object.<a name="line.209"></a>
<FONT color="green">210</FONT>         *<a name="line.210"></a>
<FONT color="green">211</FONT>         * @param stream  the input stream.<a name="line.211"></a>
<FONT color="green">212</FONT>         *<a name="line.212"></a>
<FONT color="green">213</FONT>         * @throws IOException if there is an I/O problem.<a name="line.213"></a>
<FONT color="green">214</FONT>         * @throws ClassNotFoundException if there is a problem loading a class.<a name="line.214"></a>
<FONT color="green">215</FONT>         */<a name="line.215"></a>
<FONT color="green">216</FONT>        private void readObject(ObjectInputStream stream) <a name="line.216"></a>
<FONT color="green">217</FONT>            throws IOException, ClassNotFoundException {<a name="line.217"></a>
<FONT color="green">218</FONT>            stream.defaultReadObject();<a name="line.218"></a>
<FONT color="green">219</FONT>            this.listenerList = new EventListenerList();<a name="line.219"></a>
<FONT color="green">220</FONT>            stream.registerValidation(this, 10);  // see comments about priority of<a name="line.220"></a>
<FONT color="green">221</FONT>                                                  // 10 in validateObject() <a name="line.221"></a>
<FONT color="green">222</FONT>        }<a name="line.222"></a>
<FONT color="green">223</FONT>     <a name="line.223"></a>
<FONT color="green">224</FONT>        /**<a name="line.224"></a>
<FONT color="green">225</FONT>         * Validates the object. We use this opportunity to call listeners who have <a name="line.225"></a>
<FONT color="green">226</FONT>         * registered during the deserialization process, as listeners are not <a name="line.226"></a>
<FONT color="green">227</FONT>         * serialized. This method is called by the serialization system after the <a name="line.227"></a>
<FONT color="green">228</FONT>         * entire graph is read.<a name="line.228"></a>
<FONT color="green">229</FONT>         *  <a name="line.229"></a>
<FONT color="green">230</FONT>         * This object has registered itself to the system with a priority of 10. <a name="line.230"></a>
<FONT color="green">231</FONT>         * Other callbacks may register with a higher priority number to be called <a name="line.231"></a>
<FONT color="green">232</FONT>         * before this object, or with a lower priority number to be called after <a name="line.232"></a>
<FONT color="green">233</FONT>         * the listeners were notified.<a name="line.233"></a>
<FONT color="green">234</FONT>         * <a name="line.234"></a>
<FONT color="green">235</FONT>         * All listeners are supposed to have register by now, either in their <a name="line.235"></a>
<FONT color="green">236</FONT>         * readObject or validateObject methods. Notify them that this dataset has <a name="line.236"></a>
<FONT color="green">237</FONT>         * changed.  <a name="line.237"></a>
<FONT color="green">238</FONT>         *<a name="line.238"></a>
<FONT color="green">239</FONT>         * @exception InvalidObjectException If the object cannot validate itself.<a name="line.239"></a>
<FONT color="green">240</FONT>         */<a name="line.240"></a>
<FONT color="green">241</FONT>        public void validateObject() throws InvalidObjectException {<a name="line.241"></a>
<FONT color="green">242</FONT>           fireDatasetChanged();<a name="line.242"></a>
<FONT color="green">243</FONT>        }<a name="line.243"></a>
<FONT color="green">244</FONT>       <a name="line.244"></a>
<FONT color="green">245</FONT>    }<a name="line.245"></a>




























































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