Initial code to generate the Java types from the spec.

editor/tools/plugins/com.google.dart.server/src/com/google/dart/server/generated/types/AddContentOverlay.java

Index: editor/tools/plugins/com.google.dart.server/src/com/google/dart/server/generated/types/AddContentOverlay.java
diff --git a/editor/tools/plugins/com.google.dart.server/src/com/google/dart/server/generated/types/AddContentOverlay.java b/editor/tools/plugins/com.google.dart.server/src/com/google/dart/server/generated/types/AddContentOverlay.java
new file mode 100644
index 0000000000000000000000000000000000000000..29c63b777041214014ac6def7dfd78f23f39aae6
--- /dev/null
+++ b/editor/tools/plugins/com.google.dart.server/src/com/google/dart/server/generated/types/AddContentOverlay.java
@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 2014, the Dart project authors.
+ *
+ * Licensed under the Eclipse Public License v1.0 (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.eclipse.org/legal/epl-v10.html
+ *
+ * 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.
+ *
+ * This file has been automatically generated.  Please do not edit it manually.
+ * To regenerate the file, use the script "pkg/analysis_server/spec/generate_files".
+ */
+package com.google.dart.server.generated.types;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.Map;
+import com.google.dart.server.utilities.general.ObjectUtilities;
+import org.apache.commons.lang3.StringUtils;
+
+/**
+ * A directive to begin overlaying the contents of a file. The supplied content will be used for
+ * analysis in place of the file contents in the filesystem.
+ *
+ * If this directive is used on a file that already has a file content overlay, the old overlay is
+ * discarded and replaced with the new one.
+ *
+ * @coverage dart.server.generated.types
+ */
+@SuppressWarnings("unused")
+public class AddContentOverlay {
+
+  /**
+   * The new content of the file.
+   */
+  private final String content;
+
+  /**
+   */
+  private final String type;

[Paul Berry, 2014/08/13 21:39:06]

The only purpose of this field is to allow the receiver to distinguish between
AddContentOverlay, ChangeContentOverlay, and RemoveContentOverlay.  (If you look
at the spec you'll see that each of these types sets the "type" field to a
different constant string).  Since Java has runtime type information, I'm not
sure this field is needed at all.

If we do decide to keep it, we should probably clean up the generation of the
empty doc comment--it looks a little odd.

[jwren, 2014/08/13 22:29:15]

Acknowledged.

+
+  /**
+   * Constructor for {@link AddContentOverlay}.
+   */
+  public AddContentOverlay(String type, String content) {
+    this.type = type;

[Paul Berry, 2014/08/13 21:39:06]

(Assuming that we don't get rid of this field) Since type has a fixed value,
caller shouldn't be allowed to set it.  The constructor should just set it to
the fixed value, in this case "add". 

[jwren, 2014/08/13 22:29:15]

Acknowledged.

+    this.content = content;
+  }
+
+  @Override
+  public boolean equals(Object obj) {
+    if (obj instanceof AddContentOverlay) {
+      AddContentOverlay other = (AddContentOverlay) obj;
+      return
+        ObjectUtilities.equals(other.type, type) &&
+        ObjectUtilities.equals(other.content, content);
+    }
+    return false;
+  }
+
+  /**
+   * The new content of the file.
+   */
+  public String getContent() {
+    return content;
+  }
+
+  /**
+   */
+  public String getType() {
+    return type;
+  }
+
+  @Override
+  public String toString() {

[Paul Berry, 2014/08/13 21:39:06]

It wouldn't take much to get this method to output proper JSON (change the [] to
{}, add "" around 'type' and 'content', and JSON encode the strings).  Similar
changes could probably be made to all the other generated classes.

Not sure whether this is worth doing, but I thought I would bring it up as a
possibility.

[jwren, 2014/08/13 22:29:15]

Acknowledged.  Yes.  The toString is used only as a "human readable" method for
debugging.  Getting to/from Json generated might be worth pursuing later.

+    StringBuilder builder = new StringBuilder();
+    builder.append("[");
+    builder.append("type=");
+    builder.append(type.toString() + ", ");
+    builder.append("content=");
+    builder.append(content.toString() + ", ");

[scheglov, 2014/08/13 22:05:58]

We probably don't want to call toString() for String.

[jwren, 2014/08/13 22:34:27]

Will add a TODO...  I thought of this, but it is sufficient, and generated code.
 :)

+    builder.append("]");
+    return builder.toString();
+  }
+
+}