Addded convenience predicates for detecting types of Fedora resources

fcrepo · Feb 14, 2013 · 82d9f34 · 82d9f34
1 parent 0c48e63
commit 82d9f34
Showing 1 changed file with 63 additions and 0 deletions.
diff --git a/fcrepo-kernel/src/main/java/org/fcrepo/utils/FedoraTypesUtils.java b/fcrepo-kernel/src/main/java/org/fcrepo/utils/FedoraTypesUtils.java
@@ -0,0 +1,63 @@
+
+package org.fcrepo.utils;
+
+import static com.google.common.collect.Collections2.transform;
+import static com.google.common.collect.ImmutableSet.copyOf;
+import static org.fcrepo.utils.FedoraJcrTypes.FEDORA_DATASTREAM;
+import static org.fcrepo.utils.FedoraJcrTypes.FEDORA_OBJECT;
+
+import java.util.Collection;
+
+import javax.jcr.Node;
+import javax.jcr.RepositoryException;
+import javax.jcr.nodetype.NodeType;
+
+import org.modeshape.common.SystemFailureException;
+
+import com.google.common.base.Function;
+import com.google.common.base.Predicate;
+
+public class FedoraTypesUtils {
+
+    static public Predicate<Node> isFedoraObject = new Predicate<Node>() {
+
+        @Override
+        public boolean apply(Node node) {
+
+            try {
+                return map(node.getMixinNodeTypes(), nodetype2name).contains(
+                        FEDORA_OBJECT);
+            } catch (RepositoryException e) {
+                throw new SystemFailureException(e);
+            }
+        }
+    };
+
+    static public Predicate<Node> isFedoraDatastream = new Predicate<Node>() {
+
+        @Override
+        public boolean apply(Node node) {
+
+            try {
+                return map(node.getMixinNodeTypes(), nodetype2name).contains(
+                        FEDORA_DATASTREAM);
+            } catch (RepositoryException e) {
+                throw new SystemFailureException(e);
+            }
+        }
+    };
+
+    static public Function<NodeType, String> nodetype2name =
+            new Function<NodeType, String>() {
+
+                @Override
+                public String apply(NodeType t) {
+                    return t.getName();
+                }
+            };
+
+    private static <From, To> Collection<To> map(From[] input,
+            Function<From, To> f) {
+        return transform(copyOf(input), f);
+    }
+}