Examples of org.apache.commons.digester3.plugins.PluginRules

Package org.apache.commons.digester3.plugins

Examples of org.apache.commons.digester3.plugins.PluginRules

org.apache.commons.digester3.plugins.PluginRules
A custom digester Rules manager which must be used as the Rules object when using the plugins module functionality.
During parsing, a linked list of PluginCreateRule instances develop, and this list also acts like a stack. The original instance that was set before the Digester started parsing is always at the tail of the list, and the Digester always holds a reference to the instance at the head of the list in the rules member. Initially, this list/stack holds just one instance, ie head and tail are the same object.
When the start of an xml element causes a PluginCreateRule to fire, a new PluginRules instance is created and inserted at the head of the list (ie pushed onto the stack of Rules objects). Digester.getRules() therefore returns this new Rules object, and any custom rules associated with that plugin are added to that instance.
When the end of the xml element is encountered (and therefore the PluginCreateRule end method fires), the stack of Rules objects is popped, so that Digester.getRules returns the previous Rules object. @since 1.6

        // tests that by default the attributes used are
        // named "plugin-class" and "plugin-id"


        Digester digester = new Digester();
        digester.setNamespaceAware( true );
        PluginRules rc = new PluginRules();
        digester.setRules( rc );


        PluginDeclarationRule pdr = new PluginDeclarationRule();
        digester.addRule( "root/plugin", pdr );

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        // note that in order not to screw up all other tests, we need
        // to reset the global names after we finish here!


        Digester digester = new Digester();
        digester.setNamespaceAware( true );
        PluginRules rc = new PluginRules();
        digester.setRules( rc );


        rc.setPluginIdAttribute( null, "id" );
        rc.setPluginClassAttribute( null, "class" );


        PluginDeclarationRule pdr = new PluginDeclarationRule();
        digester.addRule( "root/plugin", pdr );


        PluginCreateRule widgetPluginRule = new PluginCreateRule( Widget.class );

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        // that particular PluginCreateRule instance. Also tests that
        // attributes can be in namespaces.


        Digester digester = new Digester();
        digester.setNamespaceAware( true );
        PluginRules rc = new PluginRules();
        digester.setRules( rc );


        PluginDeclarationRule pdr = new PluginDeclarationRule();
        digester.addRule( "root/plugin", pdr );

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    {
        // * tests that custom rules can be declared on a
        // separate class by explicitly declaring the rule class.


        Digester digester = new Digester();
        PluginRules rc = new PluginRules();
        digester.setRules( rc );


        PluginDeclarationRule pdr = new PluginDeclarationRule();
        digester.addRule( "root/plugin", pdr );

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        // * tests that custom rules can be declared on a
        // separate class by explicitly declaring the rule class.
        // and explicitly declaring the rule method name.


        Digester digester = new Digester();
        PluginRules rc = new PluginRules();
        digester.setRules( rc );


        PluginDeclarationRule pdr = new PluginDeclarationRule();
        digester.addRule( "root/plugin", pdr );

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        // * tests that custom rules can be declared on a
        // separate class with name {plugin-class}RuleInfo,
        // and they are automatically detected and loaded.


        Digester digester = new Digester();
        PluginRules rc = new PluginRules();
        digester.setRules( rc );


        PluginDeclarationRule pdr = new PluginDeclarationRule();
        digester.addRule( "root/plugin", pdr );

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        // this method tests the Delegate functionality by capturing all
        // data below the specified pattern, and printing it to stdout.
        // I can't for the moment think how to turn this into a unit test,
        // so this test is disabled.
        Digester digester = new Digester();
        PluginRules rc = new PluginRules();
        digester.setRules( rc );


        DumperRule dr = new DumperRule();
        digester.addRule( "root", dr );

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        // * tests that a rule can declare custom PluginCreateRules
        // that allow it to plug in instances of itself below
        // itself.


        Digester digester = new Digester();
        PluginRules rc = new PluginRules();
        digester.setRules( rc );


        PluginDeclarationRule pdr = new PluginDeclarationRule();
        digester.addRule( "*/plugin", pdr );

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            System.exit( -1 );
        }
        String configFile = args[0];


        Digester digester = new Digester();
        PluginRules rc = new PluginRules();
        digester.setRules( rc );


        digester.addObjectCreate( "pipeline", Pipeline.class );


        digester.addCallMethod( "pipeline/source", "setSource", 1 );

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    {
        // * tests that when a PluginCreateRule is defined with a default
        // class, that the default class is instantiated when no class
        // or id is specified in the xml file.
        Digester digester = new Digester();
        PluginRules rc = new PluginRules();
        digester.setRules( rc );


        PluginCreateRule pcr = new PluginCreateRule( Widget.class, TextLabel.class );
        digester.addRule( "root/widget", pcr );
        digester.addSetNext( "root/widget", "addChild" );

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