Merge branch 'develop' into releases/Release_2_11_Branch

[jalview.git] / src / jalview / datamodel / features / FeatureSources.java

diff --git a/src/jalview/datamodel/features/FeatureSources.java b/src/jalview/datamodel/features/FeatureSources.java
new file mode 100644 (file)
index 0000000..1be1b82
--- /dev/null
+++ b/src/jalview/datamodel/features/FeatureSources.java
@@ -0,0 +1,58 @@
+package jalview.datamodel.features;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * A singleton to hold metadata about feature attributes, keyed by a unique
+ * feature source identifier
+ * 
+ * @author gmcarstairs
+ *
+ */
+public class FeatureSources
+{
+  private static FeatureSources instance = new FeatureSources();
+
+  private Map<String, FeatureSourceI> sources;
+
+  /**
+   * Answers the singleton instance of this class
+   * 
+   * @return
+   */
+  public static FeatureSources getInstance()
+  {
+    return instance;
+  }
+
+  private FeatureSources()
+  {
+    sources = new HashMap<>();
+  }
+
+  /**
+   * Answers the FeatureSource with the given unique identifier, or null if not
+   * known
+   * 
+   * @param sourceId
+   * @return
+   */
+  public FeatureSourceI getSource(String sourceId)
+  {
+    return sources.get(sourceId);
+  }
+
+  /**
+   * Adds the given source under the given key. This will replace any existing
+   * source with the same id, it is the caller's responsibility to ensure keys
+   * are unique if necessary.
+   * 
+   * @param sourceId
+   * @param source
+   */
+  public void addSource(String sourceId, FeatureSource source)
+  {
+    sources.put(sourceId, source);
+  }
+}