[567097] Provide org.eclipse.emf.cdo.common.util.ResourceSetConfigurer

https://bugs.eclipse.org/bugs/show_bug.cgi?id=567097

1 files changed, 153 insertions, 0 deletions

diff --git a/plugins/org.eclipse.emf.cdo.common/src/org/eclipse/emf/cdo/common/util/ResourceSetConfigurer.java b/plugins/org.eclipse.emf.cdo.common/src/org/eclipse/emf/cdo/common/util/ResourceSetConfigurer.java
new file mode 100644
index 0000000000..9d8f7d738b
--- /dev/null
+++ b/plugins/org.eclipse.emf.cdo.common/src/org/eclipse/emf/cdo/common/util/ResourceSetConfigurer.java
@@ -0,0 +1,153 @@
+/*
+ * Copyright (c) 2020 Eike Stepper (Loehne, Germany) and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *    Eike Stepper - initial API and implementation
+ */
+package org.eclipse.emf.cdo.common.util;
+
+import org.eclipse.net4j.util.container.IManagedContainer;
+import org.eclipse.net4j.util.container.IPluginContainer;
+import org.eclipse.net4j.util.factory.ProductCreationException;
+import org.eclipse.net4j.util.lifecycle.IDeactivateable;
+import org.eclipse.net4j.util.lifecycle.LifecycleUtil;
+
+import org.eclipse.emf.ecore.resource.ResourceSet;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * @author Eike Stepper
+ * @since 4.12
+ */
+public interface ResourceSetConfigurer
+{
+  public Object configureResourceSet(ResourceSet resourceSet, Object context, IManagedContainer container);
+
+  /**
+   * @author Eike Stepper
+   */
+  public static final class ResourceSetConfiguration implements IDeactivateable
+  {
+    private final ResourceSet resourceSet;
+
+    private final Object context;
+
+    private final IManagedContainer container;
+
+    private final Map<String, Object> configurerResults = new HashMap<>();
+
+    private ResourceSetConfiguration(ResourceSet resourceSet, Object context, IManagedContainer container)
+    {
+      this.resourceSet = resourceSet;
+      this.context = context;
+      this.container = container;
+    }
+
+    public ResourceSet getResourceSet()
+    {
+      return resourceSet;
+    }
+
+    public Object getContext()
+    {
+      return context;
+    }
+
+    public IManagedContainer getContainer()
+    {
+      return container;
+    }
+
+    public Map<String, Object> getConfigurerResults()
+    {
+      return configurerResults;
+    }
+
+    @Override
+    public Exception deactivate()
+    {
+      Exception exception = null;
+
+      try
+      {
+        for (Object configurerResult : configurerResults.values())
+        {
+          Exception ex = LifecycleUtil.deactivate(configurerResult);
+          if (ex != null && exception == null)
+          {
+            exception = ex;
+          }
+        }
+      }
+      finally
+      {
+        configurerResults.clear();
+      }
+
+      return exception;
+    }
+  }
+
+  /**
+   * @author Eike Stepper
+   */
+  public static abstract class Factory extends org.eclipse.net4j.util.factory.Factory
+  {
+    public static final String PRODUCT_GROUP = "org.eclipse.emf.cdo.common.ResourceSetConfigurers";
+
+    public Factory(String type)
+    {
+      super(PRODUCT_GROUP, type);
+    }
+
+    @Override
+    public abstract ResourceSetConfigurer create(String description) throws ProductCreationException;
+  }
+
+  /**
+   * @author Eike Stepper
+   */
+  public static final class Registry
+  {
+    public static final Registry INSTANCE = new Registry();
+
+    private Registry()
+    {
+    }
+
+    public ResourceSetConfigurer getConfigurer(IManagedContainer container, String type)
+    {
+      return (ResourceSetConfigurer)container.getElement(Factory.PRODUCT_GROUP, type, null);
+    }
+
+    public ResourceSetConfiguration configureResourceSet(ResourceSet resourceSet, Object context, IManagedContainer container)
+    {
+      ResourceSetConfiguration configuration = new ResourceSetConfiguration(resourceSet, context, container);
+      Map<String, Object> configurerResults = configuration.getConfigurerResults();
+
+      for (String type : container.getFactoryTypes(Factory.PRODUCT_GROUP))
+      {
+        ResourceSetConfigurer configurer = getConfigurer(container, type);
+
+        Object configurerResult = configurer.configureResourceSet(resourceSet, context, container);
+        if (configurerResult != null)
+        {
+          configurerResults.put(type, configurerResult);
+        }
+      }
+
+      return configuration;
+    }
+
+    public ResourceSetConfiguration configureResourceSet(ResourceSet resourceSet, Object context)
+    {
+      return configureResourceSet(resourceSet, context, IPluginContainer.INSTANCE);
+    }
+  }
+}