Importing some code

* Various annotations
* New component information class

src/main/java/info/ebenoit/ebul/cmp/DependencyInfo.java

@@ -0,0 +1,113 @@
+package info.ebenoit.ebul.cmp;
+
+
+/**
+ * This class carries information about a dependency's target. Dependencies may be specified by name or by type.
+ *
+ * @author <a href="mailto:ebenoit@ebenoit.info">E. Benoît</a>
+ */
+public class DependencyInfo
+{
+
+	/**
+	 * The name of the component being depended upon, or <code>null</code> if the dependency information is based on
+	 * type.
+	 */
+	private final String name;
+	/**
+	 * The type of the component being depended upon, or <code>null</code> if the dependency information is based on the
+	 * name.
+	 */
+	private final Class< ? > klass;
+
+
+	/**
+	 * Creates a name-based dependency information record
+	 *
+	 * @param name
+	 *            the name of the component being depended upon
+	 */
+	public DependencyInfo( final String name )
+	{
+		this.name = name;
+		this.klass = null;
+	}
+
+
+	/**
+	 * Creates a type-based dependency information record
+	 *
+	 * @param klass
+	 *            the type of the component being depended upon
+	 * @throws ComponentDefinitionException
+	 *             if the specified type is not supported (e.g. primitives or arrays)
+	 */
+	public DependencyInfo( final Class< ? > klass )
+			throws ComponentDefinitionException
+	{
+		this.name = null;
+		this.klass = klass;
+		if ( klass.isPrimitive( ) ) {
+			throw new ComponentDefinitionException( "specified dependency is a primitive type" );
+		}
+		if ( klass.isArray( ) ) {
+			throw new ComponentDefinitionException( "specified dependency is an array type" );
+		}
+	}
+
+
+	@Override
+	public int hashCode( )
+	{
+		final int prime = 31;
+		int result = 1;
+		result = prime * result + ( this.klass == null ? 0 : this.klass.hashCode( ) );
+		result = prime * result + ( this.name == null ? 0 : this.name.hashCode( ) );
+		return result;
+	}
+
+
+	@Override
+	public boolean equals( final Object obj )
+	{
+		if ( this == obj ) {
+			return true;
+		}
+		if ( obj == null ) {
+			return false;
+		}
+		if ( this.getClass( ) != obj.getClass( ) ) {
+			return false;
+		}
+		final DependencyInfo other = (DependencyInfo) obj;
+		if ( this.klass == null ) {
+			if ( other.klass != null ) {
+				return false;
+			}
+			return this.name.equals( other.name );
+		} else if ( this.klass != other.klass ) {
+			return false;
+		}
+		return true;
+	}
+
+
+	/**
+	 * @return the name of the component being depended upon, or <code>null</code> if the dependency information is
+	 *         based on type.
+	 */
+	public String getTargetName( )
+	{
+		return this.name;
+	}
+
+
+	/**
+	 * @return the type of the component being depended upon, or <code>null</code> if the dependency information is
+	 *         based on the name.
+	 */
+	public Class< ? > getTargetClass( )
+	{
+		return this.klass;
+	}
+}