1 files changed, 140 insertions, 0 deletions
diff --git a/third_party/java/buck-ios-support/java/com/facebook/buck/apple/xcode/XcodeprojSerializer.java b/third_party/java/buck-ios-support/java/com/facebook/buck/apple/xcode/XcodeprojSerializer.java
new file mode 100644
index 0000000000..b43081f90a
--- /dev/null
+++ b/third_party/java/buck-ios-support/java/com/facebook/buck/apple/xcode/XcodeprojSerializer.java
@@ -0,0 +1,140 @@
+/*
+ * Copyright 2013-present Facebook, Inc.
+ *
+ * Licensed 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 com.facebook.buck.apple.xcode;
+
+import com.dd.plist.NSArray;
+import com.dd.plist.NSDictionary;
+import com.dd.plist.NSObject;
+import com.dd.plist.NSString;
+import com.facebook.buck.log.Logger;
+import com.facebook.buck.apple.xcode.xcodeproj.PBXObject;
+import com.facebook.buck.apple.xcode.xcodeproj.PBXProject;
+
+import java.util.List;
+
+import javax.annotation.concurrent.NotThreadSafe;
+
+/**
+ * Serializer that handles conversion of an in-memory object graph representation of an xcode
+ * project (instances of {@link PBXObject}) into an Apple property list.
+ *
+ * Serialization proceeds from the root object, a ${link PBXProject} instance, to all of its
+ * referenced objects. Each object being visited calls back into this class ({@link #addField}) to
+ * populate the plist representation with its fields.
+ */
+@NotThreadSafe
+public class XcodeprojSerializer {
+  private static final Logger LOG = Logger.get(XcodeprojSerializer.class);
+
+  private final PBXProject rootObject;
+  private final NSDictionary objects;
+  private final GidGenerator gidGenerator;
+  private NSDictionary currentObject;
+
+  public XcodeprojSerializer(GidGenerator gidGenerator, PBXProject project) {
+    rootObject = project;
+    objects = new NSDictionary();
+    this.gidGenerator = gidGenerator;
+  }
+
+  /**
+   * Generate a plist serialization of project bound to this serializer.
+   */
+  public NSDictionary toPlist() {
+    serializeObject(rootObject);
+
+    NSDictionary root = new NSDictionary();
+    root.put("archiveVersion", "1");
+    root.put("classes", new NSDictionary());
+    root.put("objectVersion", "46");
+    root.put("objects", objects);
+    root.put("rootObject", rootObject.getGlobalID());
+
+    return root;
+  }
+
+  /**
+   * Serialize a {@link PBXObject} and its recursive descendants into the object dictionary.
+   *
+   * @return the GID of the serialized object
+   *
+   * @see PBXObject#serializeInto
+   */
+  private String serializeObject(PBXObject obj) {
+    if (obj.getGlobalID() == null) {
+      obj.setGlobalID(obj.generateGid(gidGenerator));
+      LOG.verbose("Set new object GID: %s", obj);
+    } else {
+      // Check that the object has already been serialized.
+      NSObject object = objects.get(obj.getGlobalID());
+      if (object != null) {
+        LOG.verbose("Object %s found, returning existing object %s", obj, object);
+        return obj.getGlobalID();
+      } else {
+        LOG.verbose("Object already had GID set: %s", obj);
+      }
+    }
+
+    // Save the existing object being deserialized.
+    NSDictionary stack = currentObject;
+
+    currentObject = new NSDictionary();
+    currentObject.put("isa", obj.isa());
+    obj.serializeInto(this);
+    objects.put(obj.getGlobalID(), currentObject);
+
+    // Restore the existing object being deserialized.
+    currentObject = stack;
+    return obj.getGlobalID();
+  }
+
+  public void addField(String name, PBXObject obj) {
+    if (obj != null) {
+      String gid = serializeObject(obj);
+      currentObject.put(name, gid);
+    }
+  }
+
+  public void addField(String name, int val) {
+    currentObject.put(name, val);
+  }
+
+  public void addField(String name, String val) {
+    if (val != null) {
+      currentObject.put(name, val);
+    }
+  }
+
+  public void addField(String name, boolean val) {
+    currentObject.put(name, val);
+  }
+
+  public void addField(String name, List<? extends PBXObject> objectList) {
+    NSArray array = new NSArray(objectList.size());
+    for (int i = 0; i < objectList.size(); i++) {
+      String gid = serializeObject(objectList.get(i));
+      array.setValue(i, new NSString(gid));
+    }
+    currentObject.put(name, array);
+  }
+
+  public void addField(String name, NSObject v) {
+    if (v != null) {
+      currentObject.put(name, v);
+    }
+  }
+}