1 files changed, 80 insertions, 0 deletions
diff --git a/dx/src/com/android/dx/dex/file/Item.java b/dx/src/com/android/dx/dex/file/Item.java
new file mode 100644
index 0000000..cf2b380
--- /dev/null
+++ b/dx/src/com/android/dx/dex/file/Item.java
@@ -0,0 +1,80 @@
+/*
+ * Copyright (C) 2007 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.
+ */
+
+package com.android.dx.dex.file;
+
+import com.android.dx.util.AnnotatedOutput;
+
+/**
+ * Base class for any structurally-significant and (potentially)
+ * repeated piece of a Dalvik file.
+ */
+public abstract class Item {
+    /**
+     * Constructs an instance.
+     */
+    public Item() {
+        // This space intentionally left blank.
+    }
+
+    /**
+     * Returns the item type for this instance.
+     *
+     * @return {@code non-null;} the item type
+     */
+    public abstract ItemType itemType();
+
+    /**
+     * Returns the human name for the particular type of item this
+     * instance is.
+     *
+     * @return {@code non-null;} the name
+     */
+    public final String typeName() {
+        return itemType().toHuman();
+    }
+
+    /**
+     * Gets the size of this instance when written, in bytes.
+     *
+     * @return {@code >= 0;} the write size
+     */
+    public abstract int writeSize();
+
+    /**
+     * Populates a {@link DexFile} with items from within this instance.
+     * This will <i>not</i> add an item to the file for this instance itself
+     * (which should have been done by whatever refers to this instance).
+     *
+     * <p><b>Note:</b> Subclasses must override this to do something
+     * appropriate.</p>
+     *
+     * @param file {@code non-null;} the file to populate
+     */
+    public abstract void addContents(DexFile file);
+
+    /**
+     * Writes the representation of this instance to the given data section,
+     * using the given {@link DexFile} to look things up as needed.
+     * If this instance keeps track of its offset, then this method will
+     * note the written offset and will also throw an exception if this
+     * instance has already been written.
+     *
+     * @param file {@code non-null;} the file to use for reference
+     * @param out {@code non-null;} where to write to
+     */
+    public abstract void writeTo(DexFile file, AnnotatedOutput out);
+}