1 files changed, 137 insertions, 0 deletions
diff --git a/dx/src/com/android/dx/dex/file/MethodIdsSection.java b/dx/src/com/android/dx/dex/file/MethodIdsSection.java
new file mode 100644
index 0000000..fa0cd3c
--- /dev/null
+++ b/dx/src/com/android/dx/dex/file/MethodIdsSection.java
@@ -0,0 +1,137 @@
+/*
+ * 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.rop.cst.Constant;
+import com.android.dx.rop.cst.CstBaseMethodRef;
+import com.android.dx.util.AnnotatedOutput;
+import com.android.dx.util.Hex;
+
+import java.util.Collection;
+import java.util.TreeMap;
+
+/**
+ * Method refs list section of a {@code .dex} file.
+ */
+public final class MethodIdsSection extends MemberIdsSection {
+    /**
+     * {@code non-null;} map from method constants to {@link
+     * MethodIdItem} instances
+     */
+    private final TreeMap<CstBaseMethodRef, MethodIdItem> methodIds;
+
+    /**
+     * Constructs an instance. The file offset is initially unknown.
+     *
+     * @param file {@code non-null;} file that this instance is part of
+     */
+    public MethodIdsSection(DexFile file) {
+        super("method_ids", file);
+
+        methodIds = new TreeMap<CstBaseMethodRef, MethodIdItem>();
+    }
+
+    /** {@inheritDoc} */
+    @Override
+    public Collection<? extends Item> items() {
+        return methodIds.values();
+    }
+
+    /** {@inheritDoc} */
+    @Override
+    public IndexedItem get(Constant cst) {
+        if (cst == null) {
+            throw new NullPointerException("cst == null");
+        }
+
+        throwIfNotPrepared();
+
+        IndexedItem result = methodIds.get((CstBaseMethodRef) cst);
+
+        if (result == null) {
+            throw new IllegalArgumentException("not found");
+        }
+
+        return result;
+    }
+
+    /**
+     * Writes the portion of the file header that refers to this instance.
+     *
+     * @param out {@code non-null;} where to write
+     */
+    public void writeHeaderPart(AnnotatedOutput out) {
+        throwIfNotPrepared();
+
+        int sz = methodIds.size();
+        int offset = (sz == 0) ? 0 : getFileOffset();
+
+        if (out.annotates()) {
+            out.annotate(4, "method_ids_size: " + Hex.u4(sz));
+            out.annotate(4, "method_ids_off:  " + Hex.u4(offset));
+        }
+
+        out.writeInt(sz);
+        out.writeInt(offset);
+    }
+
+    /**
+     * Interns an element into this instance.
+     *
+     * @param method {@code non-null;} the reference to intern
+     * @return {@code non-null;} the interned reference
+     */
+    public MethodIdItem intern(CstBaseMethodRef method) {
+        if (method == null) {
+            throw new NullPointerException("method == null");
+        }
+
+        throwIfPrepared();
+
+        MethodIdItem result = methodIds.get(method);
+
+        if (result == null) {
+            result = new MethodIdItem(method);
+            methodIds.put(method, result);
+        }
+
+        return result;
+    }
+
+    /**
+     * Gets the index of the given reference, which must have been added
+     * to this instance.
+     *
+     * @param ref {@code non-null;} the reference to look up
+     * @return {@code >= 0;} the reference's index
+     */
+    public int indexOf(CstBaseMethodRef ref) {
+        if (ref == null) {
+            throw new NullPointerException("ref == null");
+        }
+
+        throwIfNotPrepared();
+
+        MethodIdItem item = methodIds.get(ref);
+
+        if (item == null) {
+            throw new IllegalArgumentException("not found");
+        }
+
+        return item.getIndex();
+    }
+}