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//---PACKAGE DECLARATION--- |
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package uk.ac.ukc.iscream.filter.plugins; |
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//---IMPORTS--- |
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import uk.ac.ukc.iscream.filter.PluginFilter; |
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import uk.ac.ukc.iscream.filter.*; |
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import uk.ac.ukc.iscream.core.*; |
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import uk.ac.ukc.iscream.util.*; |
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import uk.ac.ukc.iscream.componentmanager.*; |
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/** |
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* This plugin is designed to check the type of incoming packets. |
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* |
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* @author $Author$ |
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* @version $Id$ |
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*/ |
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public class TypeChecker__Plugin implements PluginFilter { |
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//---FINAL ATTRIBUTES--- |
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/** |
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* The current CVS revision of this class |
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*/ |
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public final String REVISION = "$Revision: 1.1 $"; |
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public final String DESC = "Checks the type attribute in the packet attributes. This must be correctly specified to allow the packet through."; |
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//---STATIC METHODS--- |
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//---CONSTRUCTORS--- |
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//---PUBLIC METHODS--- |
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// apply the filter and return true if successful. |
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public boolean runFilter(XMLPacket packet){ |
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// return false if one of the predetermined types is not set. |
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if(packet.getParam("packet.attributes.type") == null |
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|| (packet.getParam("packet.attributes.type") != "heartbeat" |
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&& packet.getParam("packet.attributes.type") != "data")){ |
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return false; |
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} |
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// otherwise return true! |
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return true; |
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} |
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/** |
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* Overrides the {@link java.lang.Object#toString() Object.toString()} |
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* method to provide clean logging (every class should have this). |
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* |
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* This uses the uk.ac.ukc.iscream.util.NameFormat class |
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* to format the toString() |
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* |
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* @return the name of this class and its CVS revision |
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*/ |
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public String toString() { |
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return FormatName.getName( |
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_name, |
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getClass().getName(), |
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REVISION); |
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} |
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/** |
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* return the String representation of what the filter does |
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*/ |
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public String getDescription(){ |
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return DESC; |
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} |
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//---PRIVATE METHODS--- |
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//---ACCESSOR/MUTATOR METHODS--- |
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//---ATTRIBUTES--- |
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/** |
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* This is the friendly identifier of the |
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* component this class is running in. |
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* eg, a Filter may be called "filter1", |
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* If this class does not have an owning |
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* component, a name from the configuration |
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* can be placed here. This name could also |
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* be changed to null for utility classes. |
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*/ |
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private String _name = FilterMain.NAME; |
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/** |
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* This holds a reference to the |
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* system logger that is being used. |
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*/ |
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private Logger _logger = ReferenceManager.getInstance().getLogger(); |
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//---STATIC ATTRIBUTES--- |
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} |
