1 files changed, 123 insertions, 0 deletions
diff --git a/sca-java-2.x/tags/2.0.1-RC1/modules/contribution/src/main/java/org/apache/tuscany/sca/contribution/processor/DefaultValidationSchemaExtensionPoint.java b/sca-java-2.x/tags/2.0.1-RC1/modules/contribution/src/main/java/org/apache/tuscany/sca/contribution/processor/DefaultValidationSchemaExtensionPoint.java
new file mode 100644
index 0000000000..4cb83cd5ef
--- /dev/null
+++ b/sca-java-2.x/tags/2.0.1-RC1/modules/contribution/src/main/java/org/apache/tuscany/sca/contribution/processor/DefaultValidationSchemaExtensionPoint.java
@@ -0,0 +1,123 @@
+/*
+ * 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.tuscany.sca.contribution.processor;
+
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.net.URL;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+
+import org.apache.tuscany.sca.core.ExtensionPointRegistry;
+import org.apache.tuscany.sca.extensibility.ServiceDeclaration;
+
+/**
+ * Default implementation of an extension point for XML schemas.
+ *
+ * @version $Rev$ $Date$
+ */
+public class DefaultValidationSchemaExtensionPoint implements ValidationSchemaExtensionPoint {
+    private boolean enabled = true;
+    private List<String> schemas = new ArrayList<String>();
+    private boolean loaded;
+    private ExtensionPointRegistry registry;
+    
+    public DefaultValidationSchemaExtensionPoint(ExtensionPointRegistry registry, Map<String, String> attributes) {
+        super();
+        this.registry = registry;
+        if (attributes != null) {
+            String attr = attributes.get("enabled");
+            if (attr != null) {
+                enabled = Boolean.parseBoolean(attr);
+            }
+        }
+    }
+    
+    public void addSchema(String uri) {
+        schemas.add(uri);
+    }
+
+    public void removeSchema(String uri) {
+        schemas.remove(uri);
+    }
+
+    /**
+     * Load schema declarations from META-INF/services/
+     * org.apache.tuscany.sca.contribution.processor.ValidationSchema files
+     */
+    private synchronized void loadSchemas() {
+        if (loaded || (!enabled))
+            return;
+
+        // Get the schema declarations
+        Collection<ServiceDeclaration> schemaDeclarations;
+        try {
+            schemaDeclarations =
+                registry.getServiceDiscovery()
+                    .getServiceDeclarations("org.apache.tuscany.sca.contribution.processor.ValidationSchema");
+        } catch (IOException e) {
+            throw new IllegalStateException(e);
+        }
+
+        // TODO - temp fix to ensure that the schema tuscany-sca.xsd always comes first
+        String tuscanyScaXsd = null;
+
+        // Find each schema
+        for (ServiceDeclaration schemaDeclaration : schemaDeclarations) {
+            URL url = schemaDeclaration.getResource(schemaDeclaration.getClassName());
+            if (url == null) {
+                throw new IllegalArgumentException(new FileNotFoundException(schemaDeclaration.getClassName()));
+            }
+
+            if (url.toString().contains("tuscany-sca-1.1.xsd")) {
+                tuscanyScaXsd = url.toString();
+            } else {
+                schemas.add(url.toString());
+            }
+        }
+
+        if (tuscanyScaXsd != null) {
+            schemas.add(0, tuscanyScaXsd);
+        }
+
+        loaded = true;
+    }
+
+    public List<String> getSchemas() {
+        if (enabled) {
+            loadSchemas();
+            return schemas;
+        } else {
+            return Collections.emptyList();
+        }
+    }
+
+    public boolean isEnabled() {
+        return enabled;
+    }
+
+    public void setEnabled(boolean enabled) {
+        this.enabled = enabled;
+    }
+
+}