add back a DefaultXtextTargetPlatform

com.avaloq.tools.ddk.xtext/src/com/avaloq/tools/ddk/xtext/layered/DefaultXtextTargetPlatform.java

@@ -0,0 +1,78 @@
+/*******************************************************************************
+ * Copyright (c) 2016 Avaloq Group AG 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:
+ *     Avaloq Group AG - initial API and implementation
+ *******************************************************************************/
+package com.avaloq.tools.ddk.xtext.layered;
+
+import java.io.IOException;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Map;
+
+import org.eclipse.core.runtime.IProgressMonitor;
+import org.eclipse.xtext.resource.impl.ResourceDescriptionsData;
+
+import com.avaloq.tools.ddk.xtext.build.IBinaryModelStore;
+import com.avaloq.tools.ddk.xtext.resource.IDerivedObjectAssociationsStore;
+import com.avaloq.tools.ddk.xtext.resource.extensions.DelegatingResourceDescriptionsData;
+import com.avaloq.tools.ddk.xtext.resource.extensions.IResourceDescriptionsData;
+
+
+/**
+ * Default implementation implements the legacy mechanism through a {@link org.eclipse.xtext.builder.builderState.PersistedStateProvider PersistedStateProvider}
+ * .
+ */
+public class DefaultXtextTargetPlatform implements IXtextTargetPlatform {
+  private volatile IResourceDescriptionsData index; // NOPMD: volatile
+
+  @Override
+  public IResourceDescriptionsData getIResourceDescriptionsData() {
+    if (index == null) {
+      index = new DelegatingResourceDescriptionsData(new ResourceDescriptionsData(Collections.emptyList()));
+    }
+    return index;
+  }
+
+  @Override
+  public void open(final boolean clean, final IProgressMonitor monitor) throws IOException {
+    // nothing to do
+  }
+
+  @Override
+  public void close(final IProgressMonitor monitor) {
+    // nothing to do
+  }
+
+  @Override
+  public IIssueStore getIssueStore() {
+    // No issue store needed; Eclipse stores markers by itself.
+    return null;
+  }
+
+  @Override
+  public IDerivedObjectAssociationsStore getAssociationsStore() {
+    // Association store for default platform is not implemented yet
+    return null;
+  }
+
+  @Override
+  public Map<String, String> getMetadata(final Collection<String> keys, final IProgressMonitor monitor) {
+    return Collections.emptyMap();
+  }
+
+  @Override
+  public void setMetadata(final Map<String, String> options) {
+    // nothing to do
+  }
+
+  @Override
+  public IBinaryModelStore getBinaryModelStore() {
+    return null;
+  }
+}

com.avaloq.tools.ddk.xtext/src/com/avaloq/tools/ddk/xtext/layered/IXtextTargetPlatform.java

@@ -19,6 +19,7 @@
 import com.avaloq.tools.ddk.xtext.build.IBinaryModelStore;
 import com.avaloq.tools.ddk.xtext.resource.IDerivedObjectAssociationsStore;
 import com.avaloq.tools.ddk.xtext.resource.extensions.IResourceDescriptionsData;
+import com.google.inject.ImplementedBy;
 
 
 /**
@@ -47,6 +48,7 @@
  * encapsulated index or the issue store are accessed, the platform must be opened through {@link #open(boolean, IProgressMonitor)}. Once open, all operations
  * are allowed. Once it is no longer in use, a platform must be closed through {@link #close(IProgressMonitor)}.
  */
+@ImplementedBy(DefaultXtextTargetPlatform.class)
 public interface IXtextTargetPlatform {
 
   /**