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POJava Generics passed in parameter errors
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  1. POJava Generics passed in parameter errors
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    copied!<p>I get a compilation error simillar to: The method <code>visitParents(Class&lt;C&gt;)</code> in some type is not applicable for the arguments <code>(Class&lt;MyClass&gt;)</code></p> <p>MyClass is something like: <code>public class SortableTable&lt;T&gt;{...}</code></p> <p>I prefer not to change the type parameter of SortableTable to <code>&lt;C&gt;</code> since many other classes will be effected negatively, also cannot change visitParents to take anything but <code>Class&lt;C&gt;</code> as a parameter. </p> <p>Any potential solutions will be appreciated.</p> <hr> <p>Thanks for your advice. I will try to be as specific as I can without filling the page with code.</p> <p>Error description on line "visitParents(SortableTable.class, visitor);":</p> <p>The method visitParents(Class"&lt;"C">", IVisitor"&lt;"C,R">") in the type Component is not applicable for the arguments (Class"&lt;"SortableTable">", IVisitor"&lt;"Component,Void">")</p> <pre><code>public class SelectAllFilterPanel extends Panel{private static final Logger log = Logger.getLogger(CorporateActionsPanel.class); private static final long serialVersionUID = 1L; public SelectAllFilterPanel(String id, final IModel&lt;Boolean&gt; model){ super(id); add(new AjaxCheckBox("selectAll", model){ private static final long serialVersionUID = 1L; @Override protected void onUpdate(AjaxRequestTarget target) { // TODO - do this properly final AjaxRequestTarget requestTarget = target; IVisitor&lt;Component, Void&gt; visitor = new IVisitor&lt;Component, Void&gt;(){ @Override public void component(Component component, IVisit visit) { SortableTable&lt;?&gt; table = (SortableTable&lt;?&gt;)component; table.visitChildren(CheckBox.class, new IVisitor&lt;Component, Void&gt;(){ @Override public void component(Component component, IVisit visit) { if (!component.getId().equals("selectAll")){ CheckBox checkbox = (CheckBox)component; if (model.getObject()) checkbox.setModelObject(true); else checkbox.setModelObject(false); requestTarget.add(checkbox); } } }); visit.stop(); } }; visitParents(SortableTable.class, visitor); target.add(this); } }); }} </code></pre> <p>SortableTable Class:</p> <pre><code>public class SortableTable&lt;T&gt; extends DataTable&lt;T, String&gt; { private HeadersToolbar headerToolbar; @SuppressWarnings("unchecked") public SortableTable(String tableId, SortableTableDataProvider&lt;T&gt; dataProvider, int maxRows) { this(tableId, dataProvider.getColumns(), dataProvider, maxRows); } @SuppressWarnings("unchecked") public SortableTable(String tableId, List&lt;IColumnConfig&lt;T, String&gt;&gt; columns, ISortableDataProvider&lt;T, String&gt; dataProvider, int maxRows) { super(tableId, new java.util.LinkedList&lt;IColumn&lt;T, String&gt;&gt;(columns), dataProvider, maxRows); addTopToolbar(new NavigationToolbar(this)); addTopToolbar(headerToolbar = new HeadersToolbar(this, dataProvider)); addBottomToolbar(new NoRecordsToolbar(this)); setItemReuseStrategy(ReuseIfModelsEqualStrategy.getInstance()); } public void setHeaderVisible(boolean visible) { headerToolbar.setVisibilityAllowed(visible); } public boolean isHeaderVisible() { return headerToolbar.isVisibilityAllowed(); } @Override protected Item&lt;T&gt; newRowItem(String id, int index, IModel&lt;T&gt; model) { return new OddEvenItem&lt;T&gt;(id, index, model); }} </code></pre> <p>visitParent signature is:</p> <pre><code> public final &lt;R, C extends MarkupContainer&gt; R visitParents(final Class&lt;C&gt; parentClass, final IVisitor&lt;C, R&gt; visitor) { return visitParents(parentClass, visitor, new AllVisitFilter()); } </code></pre>
 

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