From 2ca4d55559f17f4f93b4cf893964e0f7c7567fe3 Mon Sep 17 00:00:00 2001
From: Peter Donald <donaldp@apache.org>
Date: Wed, 7 Feb 2001 05:38:06 +0000
Subject: [PATCH] Moved DataType engine components to tasklet hierarchy as it
 can not exist independenct of tasklets.

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@268603 13f79535-47bb-0310-9956-ffa450edef68
---
 .../ant/tasklet/engine/DataTypeEngine.java    | 43 +++++++++++
 .../tasklet/engine/DefaultDataTypeEngine.java | 71 +++++++++++++++++++
 2 files changed, 114 insertions(+)
 create mode 100644 proposal/myrmidon/src/java/org/apache/ant/tasklet/engine/DataTypeEngine.java
 create mode 100644 proposal/myrmidon/src/java/org/apache/ant/tasklet/engine/DefaultDataTypeEngine.java

diff --git a/proposal/myrmidon/src/java/org/apache/ant/tasklet/engine/DataTypeEngine.java b/proposal/myrmidon/src/java/org/apache/ant/tasklet/engine/DataTypeEngine.java
new file mode 100644
index 000000000..ba880d6c4
--- /dev/null
+++ b/proposal/myrmidon/src/java/org/apache/ant/tasklet/engine/DataTypeEngine.java
@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) The Apache Software Foundation. All rights reserved.
+ *
+ * This software is published under the terms of the Apache Software License
+ * version 1.1, a copy of which has been included with this distribution in
+ * the LICENSE file.
+ */
+package org.apache.ant.tasklet.engine;
+
+import org.apache.ant.tasklet.DataType;
+import org.apache.avalon.Component;
+import org.apache.avalon.camelot.FactoryException;
+import org.apache.avalon.camelot.LocatorRegistry;
+import org.apache.avalon.camelot.RegistryException;
+
+/**
+ * This is basically a engine that can be used to access data-types.
+ * The engine acts as a repository and factory for these types.
+ *
+ * @author <a href="mailto:donaldp@apache.org">Peter Donald</a>
+ */
+public interface DataTypeEngine
+    extends Component
+{
+    /**
+     * Retrieve registry of data-types.
+     * This is used by deployer to add types into engine.
+     *
+     * @return the registry
+     */
+    LocatorRegistry getRegistry();
+
+    /**
+     * Create a data-type of type registered under name.
+     *
+     * @param name the name of data type
+     * @return the DataType
+     * @exception RegistryException if an error occurs
+     * @exception FactoryException if an error occurs
+     */
+    DataType createDataType( String name )
+        throws RegistryException, FactoryException;
+}
diff --git a/proposal/myrmidon/src/java/org/apache/ant/tasklet/engine/DefaultDataTypeEngine.java b/proposal/myrmidon/src/java/org/apache/ant/tasklet/engine/DefaultDataTypeEngine.java
new file mode 100644
index 000000000..9105e2061
--- /dev/null
+++ b/proposal/myrmidon/src/java/org/apache/ant/tasklet/engine/DefaultDataTypeEngine.java
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) The Apache Software Foundation. All rights reserved.
+ *
+ * This software is published under the terms of the Apache Software License
+ * version 1.1, a copy of which has been included with this distribution in
+ * the LICENSE file.
+ */
+package org.apache.ant.tasklet.engine;
+
+import org.apache.ant.tasklet.DataType;
+import org.apache.avalon.ComponentManager;
+import org.apache.avalon.ComponentManagerException;
+import org.apache.avalon.Composer;
+import org.apache.avalon.Composer;
+import org.apache.avalon.camelot.DefaultLocatorRegistry;
+import org.apache.avalon.camelot.Factory;
+import org.apache.avalon.camelot.FactoryException;
+import org.apache.avalon.camelot.Locator;
+import org.apache.avalon.camelot.LocatorRegistry;
+import org.apache.avalon.camelot.RegistryException;
+
+/**
+ * This is basically a engine that can be used to access data-types.
+ * The engine acts as a repository and factory for these types.
+ *
+ * @author <a href="mailto:donaldp@apache.org">Peter Donald</a>
+ */
+public class DefaultDataTypeEngine
+    implements DataTypeEngine, Composer
+{
+    protected Factory              m_factory;
+    protected LocatorRegistry      m_registry  = new DefaultLocatorRegistry();
+    
+    /**
+     * Retrieve registry of data-types.
+     * This is used by deployer to add types into engine.
+     *
+     * @return the registry
+     */
+    public LocatorRegistry getRegistry()
+    {
+        return m_registry;
+    }
+    
+    /**
+     * Retrieve relevent services needed to deploy.
+     *
+     * @param componentManager the ComponentManager
+     * @exception ComponentManagerException if an error occurs
+     */
+    public void compose( final ComponentManager componentManager )
+        throws ComponentManagerException
+    {
+        m_factory = (Factory)componentManager.lookup( "org.apache.avalon.camelot.Factory" );
+    }
+    
+    /**
+     * Create a data-type of type registered under name.
+     *
+     * @param name the name of data type
+     * @return the DataType
+     * @exception RegistryException if an error occurs
+     * @exception FactoryException if an error occurs
+     */    
+    public DataType createDataType( final String name )
+        throws RegistryException, FactoryException
+    {
+        final Locator locator = m_registry.getLocator( name );
+        return (DataType)m_factory.create( locator, DataType.class );
+    }
+}