AAPT2: Separate out the various steps

An early refactor. Some ideas became clearer as
development continued. Now the various phases are much
clearer and more easily reusable.

Also added a ton of tests!

Change-Id: Ic8f0a70c8222370352e63533b329c40457c0903e
diff --git a/tools/aapt2/process/IResourceTableConsumer.h b/tools/aapt2/process/IResourceTableConsumer.h
new file mode 100644
index 0000000..24ad05d
--- /dev/null
+++ b/tools/aapt2/process/IResourceTableConsumer.h
@@ -0,0 +1,75 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * 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.
+ */
+
+#ifndef AAPT_PROCESS_IRESOURCETABLECONSUMER_H
+#define AAPT_PROCESS_IRESOURCETABLECONSUMER_H
+
+#include "Diagnostics.h"
+#include "NameMangler.h"
+#include "Resource.h"
+#include "ResourceValues.h"
+#include "Source.h"
+
+#include <iostream>
+#include <list>
+#include <sstream>
+
+namespace aapt {
+
+class ResourceTable;
+struct ISymbolTable;
+
+struct IAaptContext {
+    virtual ~IAaptContext() = default;
+
+    virtual ISymbolTable* getExternalSymbols() = 0;
+    virtual IDiagnostics* getDiagnostics() = 0;
+    virtual StringPiece16 getCompilationPackage() = 0;
+    virtual uint8_t getPackageId() = 0;
+    virtual NameMangler* getNameMangler() = 0;
+};
+
+struct IResourceTableConsumer {
+    virtual ~IResourceTableConsumer() = default;
+
+    virtual bool consume(IAaptContext* context, ResourceTable* table) = 0;
+};
+
+namespace xml {
+struct Node;
+}
+
+struct XmlResource {
+    ResourceFile file;
+    std::unique_ptr<xml::Node> root;
+};
+
+struct IXmlResourceConsumer {
+    virtual ~IXmlResourceConsumer() = default;
+
+    virtual bool consume(IAaptContext* context, XmlResource* resource) = 0;
+};
+
+struct IPackageDeclStack {
+    virtual ~IPackageDeclStack() = default;
+
+    virtual Maybe<ResourceName> transformPackage(const ResourceName& name,
+                                                 const StringPiece16& localPackage) const = 0;
+};
+
+} // namespace aapt
+
+#endif /* AAPT_PROCESS_IRESOURCETABLECONSUMER_H */