/usr/share/doc/libportlet-api-2.0-spec-java/api/javax/portlet/filter/class-use/ is in libportlet-api-2.0-spec-java-doc 1.0-2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/doc/libportlet-api-2.0-spec-java/api/javax/portlet/filter/class-use/ActionFilter.html
/usr/share/doc/libportlet-api-2.0-spec-java/api/javax/portlet/filter/class-use/ActionRequestWrapper.html
/usr/share/doc/libportlet-api-2.0-spec-java/api/javax/portlet/filter/class-use/ActionResponseWrapper.html
/usr/share/doc/libportlet-api-2.0-spec-java/api/javax/portlet/filter/class-use/EventFilter.html
/usr/share/doc/libportlet-api-2.0-spec-java/api/javax/portlet/filter/class-use/EventRequestWrapper.html
/usr/share/doc/libportlet-api-2.0-spec-java/api/javax/portlet/filter/class-use/EventResponseWrapper.html
/usr/share/doc/libportlet-api-2.0-spec-java/api/javax/portlet/filter/class-use/FilterChain.html
/usr/share/doc/libportlet-api-2.0-spec-java/api/javax/portlet/filter/class-use/FilterConfig.html
/usr/share/doc/libportlet-api-2.0-spec-java/api/javax/portlet/filter/class-use/PortletFilter.html
/usr/share/doc/libportlet-api-2.0-spec-java/api/javax/portlet/filter/class-use/PortletRequestWrapper.html
/usr/share/doc/libportlet-api-2.0-spec-java/api/javax/portlet/filter/class-use/PortletResponseWrapper.html
/usr/share/doc/libportlet-api-2.0-spec-java/api/javax/portlet/filter/class-use/RenderFilter.html
/usr/share/doc/libportlet-api-2.0-spec-java/api/javax/portlet/filter/class-use/RenderRequestWrapper.html
/usr/share/doc/libportlet-api-2.0-spec-java/api/javax/portlet/filter/class-use/RenderResponseWrapper.html
/usr/share/doc/libportlet-api-2.0-spec-java/api/javax/portlet/filter/class-use/ResourceFilter.html
/usr/share/doc/libportlet-api-2.0-spec-java/api/javax/portlet/filter/class-use/ResourceRequestWrapper.html
/usr/share/doc/libportlet-api-2.0-spec-java/api/javax/portlet/filter/class-use/ResourceResponseWrapper.html