Emergency impending hard drive failure dump - lots of changes on the frontend, but they're all potentially controversial so I'm not pushing to master yet. Beginnings of show viewer. Application now run through demo menu, which allows for the links between modules to be tested.

1 files changed, 70 insertions, 0 deletions

diff --git a/src/uk/org/ury/database/DatabaseItem.java b/src/uk/org/ury/database/DatabaseItem.java
new file mode 100644
index 0000000..4f6d34d
--- /dev/null
+++ b/src/uk/org/ury/database/DatabaseItem.java
@@ -0,0 +1,70 @@
+package uk.org.ury.database;
+
+import java.util.Map;
+
+import uk.org.ury.database.exceptions.MissingPropertyException;
+
+
+/**
+ * An abstract class presenting a template for objects serving as 
+ * a data structure for collections of properties retrieved from 
+ * a SQL database.
+ *
+ * @param E  The enumeration type used as the property list.
+ * 
+ * @param T  The type of datum stored for each property.
+ * 
+ * @author   Matt Windsor
+ */
+
+public abstract class DatabaseItem<E, T>
+{
+  private Map<E, T> properties;
+  
+  /**
+   * Construct a new item from an existing list of properties.
+   * 
+   * @param properties  The map of properties that the new item will 
+   *                    inherit.
+   */
+  
+  public
+  DatabaseItem (Map<E, T> properties)
+  {
+    this.properties = properties;
+  }
+  
+  
+  /**
+   * Check whether a property has been set in the item.
+   * 
+   * @return  true if the property has been set; false otherwise.
+   */
+  
+  public boolean
+  has (E property)
+  {
+    return properties.containsKey (property);
+  }
+  
+  
+  /**
+   * Query this item for a property.
+   * 
+   * @param property  The property to query.
+   * 
+   * @return          The property, if it exists.
+   * 
+   * @throws          MissingPropertyException if the property does 
+   *                  not exist.
+   */
+  
+  public T
+  get (E property) throws MissingPropertyException
+  {
+    if (properties.containsKey (property))
+      return properties.get (property);
+    else
+      throw new MissingPropertyException (property.toString ());
+  }
+}