[metamodel] 02/07: Added a DataContextFactory for the new .arff file module.

[ka...@apache.org]

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commit 5e9f2b32eae189f59ea1fc0d9a9db650a60b93e8
Author: Kasper Sørensen <i....@gmail.com>
AuthorDate: Thu Mar 28 12:26:21 2019 -0700

    Added a DataContextFactory for the new .arff file module.
---
 .../metamodel/arff/ArffDataContextFactory.java     | 51 ++++++++++++++++++++++
 ...org.apache.metamodel.factory.DataContextFactory |  1 +
 2 files changed, 52 insertions(+)

diff --git a/arff/src/main/java/org/apache/metamodel/arff/ArffDataContextFactory.java b/arff/src/main/java/org/apache/metamodel/arff/ArffDataContextFactory.java
new file mode 100644
index 0000000..632479a
--- /dev/null
+++ b/arff/src/main/java/org/apache/metamodel/arff/ArffDataContextFactory.java
@@ -0,0 +1,51 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.metamodel.arff;
+
+import java.io.File;
+
+import org.apache.metamodel.ConnectionException;
+import org.apache.metamodel.DataContext;
+import org.apache.metamodel.factory.AbstractDataContextFactory;
+import org.apache.metamodel.factory.DataContextFactory;
+import org.apache.metamodel.factory.DataContextProperties;
+import org.apache.metamodel.factory.ResourceFactoryRegistry;
+import org.apache.metamodel.factory.UnsupportedDataContextPropertiesException;
+import org.apache.metamodel.util.Resource;
+
+/**
+ * {@link DataContextFactory} for {@link ArffDataContext} which reads .arff files.
+ */
+public class ArffDataContextFactory extends AbstractDataContextFactory {
+
+    @Override
+    protected String getType() {
+        return "arff";
+    }
+
+    @Override
+    public DataContext create(DataContextProperties properties, ResourceFactoryRegistry resourceFactoryRegistry)
+            throws UnsupportedDataContextPropertiesException, ConnectionException {
+        assert accepts(properties, resourceFactoryRegistry);
+
+        final Resource resource = resourceFactoryRegistry.createResource(properties.getResourceProperties());
+
+        return new ArffDataContext(resource);
+    }
+}
diff --git a/arff/src/main/resources/META-INF/services/org.apache.metamodel.factory.DataContextFactory b/arff/src/main/resources/META-INF/services/org.apache.metamodel.factory.DataContextFactory
new file mode 100644
index 0000000..5626525
--- /dev/null
+++ b/arff/src/main/resources/META-INF/services/org.apache.metamodel.factory.DataContextFactory
@@ -0,0 +1 @@
+org.apache.metamodel.arff.ArffDataContextFactory