1 files changed, 147 insertions, 0 deletions
diff --git a/plugins/org.eclipse.emf.cdo.evolution/src/org/eclipse/emf/cdo/evolution/util/DiagnosticID.java b/plugins/org.eclipse.emf.cdo.evolution/src/org/eclipse/emf/cdo/evolution/util/DiagnosticID.java
new file mode 100644
index 0000000000..eaea7ad7cb
--- /dev/null
+++ b/plugins/org.eclipse.emf.cdo.evolution/src/org/eclipse/emf/cdo/evolution/util/DiagnosticID.java
@@ -0,0 +1,147 @@
+/*
+ * Copyright (c) 2004-2018 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.evolution.util;
+
+import org.eclipse.emf.common.util.Diagnostic;
+import org.eclipse.emf.ecore.EModelElement;
+
+/**
+ * @author Eike Stepper
+ */
+public final class DiagnosticID
+{
+  private final String value;
+
+  public DiagnosticID(String value)
+  {
+    this.value = value;
+  }
+
+  public String getValue()
+  {
+    return value;
+  }
+
+  @Override
+  public int hashCode()
+  {
+    return 31 + (value == null ? 0 : value.hashCode());
+  }
+
+  @Override
+  public boolean equals(Object obj)
+  {
+    if (this == obj)
+    {
+      return true;
+    }
+
+    if (obj == null)
+    {
+      return false;
+    }
+
+    if (getClass() != obj.getClass())
+    {
+      return false;
+    }
+
+    DiagnosticID other = (DiagnosticID)obj;
+    if (value == null)
+    {
+      if (other.value != null)
+      {
+        return false;
+      }
+    }
+    else if (!value.equals(other.value))
+    {
+      return false;
+    }
+
+    return true;
+  }
+
+  @Override
+  public String toString()
+  {
+    return "DiagnosticID[" + value + "]";
+  }
+
+  public static DiagnosticID get(Diagnostic diagnostic)
+  {
+    for (Object data : diagnostic.getData())
+    {
+      if (data instanceof DiagnosticID)
+      {
+        return (DiagnosticID)data;
+      }
+    }
+
+    StringBuilder builder = new StringBuilder();
+    builder.append(diagnostic.getSource());
+    builder.append("|");
+    builder.append(diagnostic.getCode());
+
+    for (Object data : diagnostic.getData())
+    {
+      appendData(builder, data);
+    }
+
+    return new DiagnosticID(builder.toString());
+  }
+
+  private static void appendData(final StringBuilder builder, Object data)
+  {
+    if (data instanceof Provider)
+    {
+      Provider provider = (Provider)data;
+      provider.extractDiagnosticData(new Provider.Context()
+      {
+        public void add(String data)
+        {
+          builder.append("|");
+          builder.append(data);
+        }
+      });
+
+      return;
+    }
+
+    if (data instanceof EModelElement)
+    {
+      EModelElement modelElement = (EModelElement)data;
+      String label = ElementHandler.getLabel(modelElement);
+      if (label != null)
+      {
+        builder.append("|");
+        builder.append(label);
+        return;
+      }
+    }
+  }
+
+  /**
+   * @author Eike Stepper
+   */
+  public interface Provider
+  {
+    public void extractDiagnosticData(Context context);
+
+    /**
+     * @author Eike Stepper
+     */
+    public interface Context
+    {
+      public void add(String data);
+    }
+  }
+}