Add propertyIs filter

The existing property match filter tests a property
in the PropertiesChanged signal payload.

Add a match filter that tests any arbitrary property on
any object.

Change-Id: I1c238c03a3ccbf45f7b338693a4342fbd4f670c2
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>

1 files changed, 23 insertions, 0 deletions

diff --git a/README.md b/README.md
index 5f479fc..c7c64a1 100644
--- a/README.md
+++ b/README.md
@@ -47,15 +47,38 @@ The available filters provided by PIM are:
 
 * propertyChangedTo - Only match events when the specified property has
 the specified value.
+* propertyIs - Only match events when the specified property has
+the specified value.
 
 ----
 **propertyChangedTo**
 
+The property under test is obtained from an sdbus message
+generated from an org.freedesktop.DBus.Properties.PropertiesChanged
+signal payload.
+
 Supported arguments for the propertyChangedTo filter are:
 * interface - The interface hosting the property to be checked.
 * property - The property to check.
 * value - The value to check.
 
+----
+**propertyIs**
+
+The property under test is obtained by invoking
+org.freedesktop.Properties.Get on the specified interface.
+
+Supported arguments for the propertyIs filter are:
+* path - The object hosting the property to be checked.
+* interface - The interface hosting the property to be checked.
+* property - The property to check.
+* value - The value to check.
+* service - An optional DBus service name.
+
+The service argument is optional.  If provided that service will
+be called explicitly.  If omitted, the service will be obtained
+with an xyz.openbmc_project.ObjectMapper lookup.
+
 ---
 **actions**