Add filters on policy objects

I just raised this review to shwo where I'm going with the
filters. They are not complete yet.

Issue-ID: POLICY-1095
Change-Id: I7b602a32bb67159b893f3b3cefea5d88038c4e5f
Signed-off-by: liamfallon <liam.fallon@est.tech>

1 files changed, 43 insertions, 1 deletions

diff --git a/models-pdp/src/main/java/org/onap/policy/models/pdp/concepts/PdpGroupFilter.java b/models-pdp/src/main/java/org/onap/policy/models/pdp/concepts/PdpGroupFilter.java
index f06a34dbb..f7a47ccd7 100644
--- a/models-pdp/src/main/java/org/onap/policy/models/pdp/concepts/PdpGroupFilter.java
+++ b/models-pdp/src/main/java/org/onap/policy/models/pdp/concepts/PdpGroupFilter.java
@@ -20,11 +20,53 @@
 
 package org.onap.policy.models.pdp.concepts;
 
+import java.util.List;
+import java.util.stream.Collectors;
+
+import lombok.Builder;
+import lombok.Data;
+import lombok.NonNull;
+
+import org.onap.policy.models.base.PfObjectFiler;
+import org.onap.policy.models.pdp.enums.PdpState;
+
 /**
  * Filter class for searches for {@link PdpGroup} instances.
+ * If any fields are null, they are ignored.
  *
  * @author Liam Fallon (liam.fallon@est.tech)
  */
-public class PdpGroupFilter {
+@Builder
+@Data
+public class PdpGroupFilter implements PfObjectFiler<PdpGroup> {
+    public static final String LATEST_VERSION = "LATEST";
+
+    // Regular expression
+    private String name;
+
+    // Regular Expression, set to LATEST_VERRSION to get the latest version
+    private String version;
+
+    private PdpState groupState;
+
+    // Regular expression
+    private String pdpType;
+
+    // Set regular expressions on fields to match policy type names and versions
+    private ToscaPolicyTypeIdentifier policyType;
+
+    // Set regular expressions on fields to match policy names and versions
+    private ToscaPolicyIdentifier policy;
+
+    @Override
+    public List<PdpGroup> filter(@NonNull final List<PdpGroup> originalList) {
 
+        // @formatter:off
+        return originalList.stream()
+                .filter(p -> name       != null && p.getName()   .matches(name))
+                .filter(p -> version    != null && p.getVersion().matches(version))
+                .filter(p -> groupState != null && p.getPdpGroupState().equals(groupState))
+                .collect(Collectors.toList());
+        // @formatter:off
+    }
 }