Google Git
Sign in
eclipse / gerrit / www.eclipse.org / january / e7a19f583b550c3258544bafaae378f9175975f2 / . / apidocs / 2.2.0 / src-html / org / eclipse / january / dataset / DataEvent.html
blob: b9f3443c22ca8012d67fd3cb5212b6fac65def66 [file] [log] [blame]
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html lang="en">
<head>
<title>Source code</title>
<link rel="stylesheet" type="text/css" href="../../../../../stylesheet.css" title="Style">
</head>
<body>
<div class="sourceContainer">
<pre><span class="sourceLineNo">001</span>/*-<a name="line.1"></a>
<span class="sourceLineNo">002</span> * Copyright 2015, 2016 Diamond Light Source Ltd.<a name="line.2"></a>
<span class="sourceLineNo">003</span> *<a name="line.3"></a>
<span class="sourceLineNo">004</span> * All rights reserved. This program and the accompanying materials<a name="line.4"></a>
<span class="sourceLineNo">005</span> * are made available under the terms of the Eclipse Public License v1.0<a name="line.5"></a>
<span class="sourceLineNo">006</span> * which accompanies this distribution, and is available at<a name="line.6"></a>
<span class="sourceLineNo">007</span> * http://www.eclipse.org/legal/epl-v10.html<a name="line.7"></a>
<span class="sourceLineNo">008</span> */<a name="line.8"></a>
<span class="sourceLineNo">009</span><a name="line.9"></a>
<span class="sourceLineNo">010</span>package org.eclipse.january.dataset;<a name="line.10"></a>
<span class="sourceLineNo">011</span><a name="line.11"></a>
<span class="sourceLineNo">012</span>import java.util.Arrays;<a name="line.12"></a>
<span class="sourceLineNo">013</span>import java.util.EventObject;<a name="line.13"></a>
<span class="sourceLineNo">014</span>import java.util.regex.Matcher;<a name="line.14"></a>
<span class="sourceLineNo">015</span>import java.util.regex.Pattern;<a name="line.15"></a>
<span class="sourceLineNo">016</span><a name="line.16"></a>
<span class="sourceLineNo">017</span>/**<a name="line.17"></a>
<span class="sourceLineNo">018</span> * Event fired to diseminate information about a dataset changing.<a name="line.18"></a>
<span class="sourceLineNo">019</span> * For instance if an image represents a live stream.<a name="line.19"></a>
<span class="sourceLineNo">020</span> * <a name="line.20"></a>
<span class="sourceLineNo">021</span> * This event is passed over web-sockets. To keep dependencies to a <a name="line.21"></a>
<span class="sourceLineNo">022</span> * minimum and since it is really simple, we have added an encode and<a name="line.22"></a>
<span class="sourceLineNo">023</span> * decode to JSON without the need for an API like jackson.<a name="line.23"></a>
<span class="sourceLineNo">024</span> */<a name="line.24"></a>
<span class="sourceLineNo">025</span>public class DataEvent extends EventObject {<a name="line.25"></a>
<span class="sourceLineNo">026</span> <a name="line.26"></a>
<span class="sourceLineNo">027</span> /**<a name="line.27"></a>
<span class="sourceLineNo">028</span> * <a name="line.28"></a>
<span class="sourceLineNo">029</span> */<a name="line.29"></a>
<span class="sourceLineNo">030</span> private static final long serialVersionUID = 751125872769278449L;<a name="line.30"></a>
<span class="sourceLineNo">031</span><a name="line.31"></a>
<span class="sourceLineNo">032</span> private int[] shape;<a name="line.32"></a>
<span class="sourceLineNo">033</span> <a name="line.33"></a>
<span class="sourceLineNo">034</span> /**<a name="line.34"></a>
<span class="sourceLineNo">035</span> * Optionally, we can indicate where the file path was.<a name="line.35"></a>
<span class="sourceLineNo">036</span> */<a name="line.36"></a>
<span class="sourceLineNo">037</span> private String filePath;<a name="line.37"></a>
<span class="sourceLineNo">038</span><a name="line.38"></a>
<span class="sourceLineNo">039</span> /**<a name="line.39"></a>
<span class="sourceLineNo">040</span> * The name of the dataset, may be ""<a name="line.40"></a>
<span class="sourceLineNo">041</span> */<a name="line.41"></a>
<span class="sourceLineNo">042</span> private String name;<a name="line.42"></a>
<span class="sourceLineNo">043</span><a name="line.43"></a>
<span class="sourceLineNo">044</span> public DataEvent() {<a name="line.44"></a>
<span class="sourceLineNo">045</span> this("", new int[]{1});<a name="line.45"></a>
<span class="sourceLineNo">046</span> }<a name="line.46"></a>
<span class="sourceLineNo">047</span><a name="line.47"></a>
<span class="sourceLineNo">048</span> /**<a name="line.48"></a>
<span class="sourceLineNo">049</span> * Creates an event to notify that this data has changed.<a name="line.49"></a>
<span class="sourceLineNo">050</span> * @param name<a name="line.50"></a>
<span class="sourceLineNo">051</span> */<a name="line.51"></a>
<span class="sourceLineNo">052</span> public DataEvent(String name, int[] shape) {<a name="line.52"></a>
<span class="sourceLineNo">053</span> super(name);<a name="line.53"></a>
<span class="sourceLineNo">054</span> this.shape = shape;<a name="line.54"></a>
<span class="sourceLineNo">055</span> this.name = name;<a name="line.55"></a>
<span class="sourceLineNo">056</span> }<a name="line.56"></a>
<span class="sourceLineNo">057</span><a name="line.57"></a>
<span class="sourceLineNo">058</span> @Override<a name="line.58"></a>
<span class="sourceLineNo">059</span> public String getSource() {<a name="line.59"></a>
<span class="sourceLineNo">060</span> return (String)super.getSource();<a name="line.60"></a>
<span class="sourceLineNo">061</span> }<a name="line.61"></a>
<span class="sourceLineNo">062</span> <a name="line.62"></a>
<span class="sourceLineNo">063</span> public String getName() {<a name="line.63"></a>
<span class="sourceLineNo">064</span> return getSource();<a name="line.64"></a>
<span class="sourceLineNo">065</span> }<a name="line.65"></a>
<span class="sourceLineNo">066</span> <a name="line.66"></a>
<span class="sourceLineNo">067</span> public void setName(String name) {<a name="line.67"></a>
<span class="sourceLineNo">068</span> this.name = name;<a name="line.68"></a>
<span class="sourceLineNo">069</span> }<a name="line.69"></a>
<span class="sourceLineNo">070</span> <a name="line.70"></a>
<span class="sourceLineNo">071</span> public int[] getShape() {<a name="line.71"></a>
<span class="sourceLineNo">072</span> return shape;<a name="line.72"></a>
<span class="sourceLineNo">073</span> }<a name="line.73"></a>
<span class="sourceLineNo">074</span><a name="line.74"></a>
<span class="sourceLineNo">075</span> public void setShape(int[] shape) {<a name="line.75"></a>
<span class="sourceLineNo">076</span> this.shape = shape;<a name="line.76"></a>
<span class="sourceLineNo">077</span> }<a name="line.77"></a>
<span class="sourceLineNo">078</span><a name="line.78"></a>
<span class="sourceLineNo">079</span> public String getFilePath() {<a name="line.79"></a>
<span class="sourceLineNo">080</span> return filePath;<a name="line.80"></a>
<span class="sourceLineNo">081</span> }<a name="line.81"></a>
<span class="sourceLineNo">082</span><a name="line.82"></a>
<span class="sourceLineNo">083</span> public void setFilePath(String filePath) {<a name="line.83"></a>
<span class="sourceLineNo">084</span> this.filePath = filePath;<a name="line.84"></a>
<span class="sourceLineNo">085</span> }<a name="line.85"></a>
<span class="sourceLineNo">086</span><a name="line.86"></a>
<span class="sourceLineNo">087</span> /**<a name="line.87"></a>
<span class="sourceLineNo">088</span> * Encodes event to string<a name="line.88"></a>
<span class="sourceLineNo">089</span> * @return encoded string<a name="line.89"></a>
<span class="sourceLineNo">090</span> */<a name="line.90"></a>
<span class="sourceLineNo">091</span> public String encode() {<a name="line.91"></a>
<span class="sourceLineNo">092</span> final StringBuilder buf = new StringBuilder();<a name="line.92"></a>
<span class="sourceLineNo">093</span> buf.append("{");<a name="line.93"></a>
<span class="sourceLineNo">094</span> buf.append("\"name\" : \"");<a name="line.94"></a>
<span class="sourceLineNo">095</span> buf.append(getName());<a name="line.95"></a>
<span class="sourceLineNo">096</span> buf.append("\"");<a name="line.96"></a>
<span class="sourceLineNo">097</span> buf.append(", \"shape\" : ");<a name="line.97"></a>
<span class="sourceLineNo">098</span> buf.append(Arrays.toString(shape));<a name="line.98"></a>
<span class="sourceLineNo">099</span> <a name="line.99"></a>
<span class="sourceLineNo">100</span> buf.append(", \"filepath\" : \"");<a name="line.100"></a>
<span class="sourceLineNo">101</span> buf.append(getFilePath());<a name="line.101"></a>
<span class="sourceLineNo">102</span> buf.append("\"");<a name="line.102"></a>
<span class="sourceLineNo">103</span> <a name="line.103"></a>
<span class="sourceLineNo">104</span> buf.append("}");<a name="line.104"></a>
<span class="sourceLineNo">105</span> return buf.toString();<a name="line.105"></a>
<span class="sourceLineNo">106</span> }<a name="line.106"></a>
<span class="sourceLineNo">107</span> <a name="line.107"></a>
<span class="sourceLineNo">108</span> /**<a name="line.108"></a>
<span class="sourceLineNo">109</span> * Decodes from String for instance {"name" : "Tests", "shape" : [1024, 1024], "filepath" : "C:/tmp/Fred.txt"}<a name="line.109"></a>
<span class="sourceLineNo">110</span> * @return DataEvent<a name="line.110"></a>
<span class="sourceLineNo">111</span> */<a name="line.111"></a>
<span class="sourceLineNo">112</span> public static DataEvent decode(String json) {<a name="line.112"></a>
<span class="sourceLineNo">113</span> <a name="line.113"></a>
<span class="sourceLineNo">114</span> String name = getValue(json, ".*\"name\" \\: \"([^\"]+)\".*");<a name="line.114"></a>
<span class="sourceLineNo">115</span> String filepath = getValue(json, ".*\"filepath\" \\: \"([^\"]+)\".*");<a name="line.115"></a>
<span class="sourceLineNo">116</span> String shape = getValue(json, ".*\"shape\" \\: \\[([^\\]]+)\\].*");<a name="line.116"></a>
<span class="sourceLineNo">117</span><a name="line.117"></a>
<span class="sourceLineNo">118</span> DataEvent ret = new DataEvent(name, getArray(shape));<a name="line.118"></a>
<span class="sourceLineNo">119</span> if (filepath!=null &amp;&amp; !"null".equals(filepath)) {<a name="line.119"></a>
<span class="sourceLineNo">120</span> ret.setFilePath(filepath);<a name="line.120"></a>
<span class="sourceLineNo">121</span> }<a name="line.121"></a>
<span class="sourceLineNo">122</span> return ret;<a name="line.122"></a>
<span class="sourceLineNo">123</span> }<a name="line.123"></a>
<span class="sourceLineNo">124</span><a name="line.124"></a>
<span class="sourceLineNo">125</span><a name="line.125"></a>
<span class="sourceLineNo">126</span> private static String getValue(String json, String regex) {<a name="line.126"></a>
<span class="sourceLineNo">127</span> Matcher matcher = Pattern.compile(regex).matcher(json);<a name="line.127"></a>
<span class="sourceLineNo">128</span> if (matcher.matches()) {<a name="line.128"></a>
<span class="sourceLineNo">129</span> return matcher.group(1);<a name="line.129"></a>
<span class="sourceLineNo">130</span> }<a name="line.130"></a>
<span class="sourceLineNo">131</span> throw new RuntimeException(regex+" unmatched in "+json);<a name="line.131"></a>
<span class="sourceLineNo">132</span> }<a name="line.132"></a>
<span class="sourceLineNo">133</span><a name="line.133"></a>
<span class="sourceLineNo">134</span> private static int[] getArray(String value) {<a name="line.134"></a>
<span class="sourceLineNo">135</span> String[] split = value.split(",");<a name="line.135"></a>
<span class="sourceLineNo">136</span> int[] ret = new int[split.length];<a name="line.136"></a>
<span class="sourceLineNo">137</span> for (int i = 0; i &lt; split.length; i++) ret[i] = Integer.parseInt(split[i].trim());<a name="line.137"></a>
<span class="sourceLineNo">138</span> return ret;<a name="line.138"></a>
<span class="sourceLineNo">139</span> }<a name="line.139"></a>
<span class="sourceLineNo">140</span><a name="line.140"></a>
<span class="sourceLineNo">141</span> @Override<a name="line.141"></a>
<span class="sourceLineNo">142</span> public int hashCode() {<a name="line.142"></a>
<span class="sourceLineNo">143</span> final int prime = 31;<a name="line.143"></a>
<span class="sourceLineNo">144</span> int result = 1;<a name="line.144"></a>
<span class="sourceLineNo">145</span> result = prime * result + ((filePath == null) ? 0 : filePath.hashCode());<a name="line.145"></a>
<span class="sourceLineNo">146</span> result = prime * result + ((name == null) ? 0 : name.hashCode());<a name="line.146"></a>
<span class="sourceLineNo">147</span> result = prime * result + Arrays.hashCode(shape);<a name="line.147"></a>
<span class="sourceLineNo">148</span> return result;<a name="line.148"></a>
<span class="sourceLineNo">149</span> }<a name="line.149"></a>
<span class="sourceLineNo">150</span><a name="line.150"></a>
<span class="sourceLineNo">151</span> @Override<a name="line.151"></a>
<span class="sourceLineNo">152</span> public boolean equals(Object obj) {<a name="line.152"></a>
<span class="sourceLineNo">153</span> if (this == obj)<a name="line.153"></a>
<span class="sourceLineNo">154</span> return true;<a name="line.154"></a>
<span class="sourceLineNo">155</span> if (obj == null)<a name="line.155"></a>
<span class="sourceLineNo">156</span> return false;<a name="line.156"></a>
<span class="sourceLineNo">157</span> if (getClass() != obj.getClass())<a name="line.157"></a>
<span class="sourceLineNo">158</span> return false;<a name="line.158"></a>
<span class="sourceLineNo">159</span> DataEvent other = (DataEvent) obj;<a name="line.159"></a>
<span class="sourceLineNo">160</span> if (filePath == null) {<a name="line.160"></a>
<span class="sourceLineNo">161</span> if (other.filePath != null)<a name="line.161"></a>
<span class="sourceLineNo">162</span> return false;<a name="line.162"></a>
<span class="sourceLineNo">163</span> } else if (!filePath.equals(other.filePath))<a name="line.163"></a>
<span class="sourceLineNo">164</span> return false;<a name="line.164"></a>
<span class="sourceLineNo">165</span> if (name == null) {<a name="line.165"></a>
<span class="sourceLineNo">166</span> if (other.name != null)<a name="line.166"></a>
<span class="sourceLineNo">167</span> return false;<a name="line.167"></a>
<span class="sourceLineNo">168</span> } else if (!name.equals(other.name))<a name="line.168"></a>
<span class="sourceLineNo">169</span> return false;<a name="line.169"></a>
<span class="sourceLineNo">170</span> if (!Arrays.equals(shape, other.shape))<a name="line.170"></a>
<span class="sourceLineNo">171</span> return false;<a name="line.171"></a>
<span class="sourceLineNo">172</span> return true;<a name="line.172"></a>
<span class="sourceLineNo">173</span> }<a name="line.173"></a>
<span class="sourceLineNo">174</span><a name="line.174"></a>
<span class="sourceLineNo">175</span>}<a name="line.175"></a>
</pre>
</div>
</body>
</html>