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Java Element Filter Extensions

###### Identifier:

org.eclipse.jdt.ui.javaElementFilters

###### Description:

This extension point is used to extend Java UI views with filters.

###### Configuration Markup:

<!ELEMENT extension (filter*)>

<!ATTLIST extension

point CDATA #REQUIRED

id CDATA #IMPLIED

name CDATA #IMPLIED>

- point - a fully qualified identifier of the target extension point
- id - an optional identifier of the extension instance
- name - an optional name of the extension instance

<!ELEMENT filter EMPTY>

<!ATTLIST filter

id CDATA #IMPLIED

name CDATA #IMPLIED

description CDATA #IMPLIED

targetId CDATA #IMPLIED

enabled (true | false)

pattern CDATA #IMPLIED

class CDATA #IMPLIED>

- id - a unique id that will be used to identify this filter.
- name - a unique name that allows to identify this filter in the UI. This attribute should be a translated string. Though this attribute is not required for pattern filters (i.e. those using the `pattern` attribute) we suggest to provide a name anyway, otherwise the pattern string itself would be used to represent the filter in the UI.
- description - a short description for this filter. This attribute should be a translated string.
- targetId - the id of the target where this filter is contributed. If this attribute is missing, then the filter will be contributed to all views which use the `org.eclipse.jdt.ui.actions.customFiltersActionGroup`. This replaces the deprecated attributed "viewId".
- enabled - the filter will be enabled if this attribute is present and its value is "true". Most likely the user will be able to override this setting in the UI.
- pattern - elements whose name matches this pattern will be hidden. This attribute is here for backward compatibility and should no longer be used. All views that allow to plug-in a filter also allow to add pattern filters directly via UI.
- class - the name of the class used to filter the view. The class must extend `org.eclipse.jface.viewers.ViewerFilter`. If this attribute is here then the pattern attribute must not provided.

###### Examples:

The following is an example of Java element filter definition. It filters out inner classes and is initially selected.

     <extension point="org.eclipse.jdt.ui.javaElementFilters">
      <filter
       id="org.eclipse.jdt.ui.PackageExplorer.LibraryFilter"
       name="%HideReferencedLibraries.label"
       description="%HideReferencedLibraries.description"
       targetId="org.eclipse.jdt.ui.PackageExplorer"
       class="org.eclipse.jdt.internal.ui.filters.LibraryFilter"
       enabled="false">
      </filter>
     </extension>

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