1 files changed, 127 insertions, 0 deletions
diff --git a/dexlib2/src/main/java/org/jf/dexlib2/writer/builder/BuilderMethodHandlePool.java b/dexlib2/src/main/java/org/jf/dexlib2/writer/builder/BuilderMethodHandlePool.java
new file mode 100644
index 00000000..320344c9
--- /dev/null
+++ b/dexlib2/src/main/java/org/jf/dexlib2/writer/builder/BuilderMethodHandlePool.java
@@ -0,0 +1,127 @@
+/*
+ * Copyright 2018, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package org.jf.dexlib2.writer.builder;
+
+import com.google.common.collect.Maps;
+import org.jf.dexlib2.MethodHandleType;
+import org.jf.dexlib2.iface.reference.FieldReference;
+import org.jf.dexlib2.iface.reference.MethodHandleReference;
+import org.jf.dexlib2.iface.reference.MethodReference;
+import org.jf.dexlib2.writer.MethodHandleSection;
+import org.jf.util.ExceptionWithContext;
+
+import javax.annotation.Nonnull;
+import java.util.Collection;
+import java.util.Map;
+import java.util.concurrent.ConcurrentMap;
+
+public class BuilderMethodHandlePool extends BaseBuilderPool
+        implements MethodHandleSection<BuilderMethodHandleReference, BuilderFieldReference, BuilderMethodReference> {
+    @Nonnull private final ConcurrentMap<MethodHandleReference, BuilderMethodHandleReference> internedItems =
+            Maps.newConcurrentMap();
+
+    public BuilderMethodHandlePool(@Nonnull DexBuilder dexBuilder) {
+        super(dexBuilder);
+    }
+
+    public BuilderMethodHandleReference internMethodHandle(MethodHandleReference methodHandleReference) {
+        BuilderMethodHandleReference internedMethodHandle = internedItems.get(methodHandleReference);
+        if (internedMethodHandle != null) {
+            return internedMethodHandle;
+        }
+
+        BuilderReference memberReference;
+        switch (methodHandleReference.getMethodHandleType()) {
+            case MethodHandleType.STATIC_PUT:
+            case MethodHandleType.STATIC_GET:
+            case MethodHandleType.INSTANCE_PUT:
+            case MethodHandleType.INSTANCE_GET:
+                memberReference = dexBuilder.internFieldReference(
+                        (FieldReference) methodHandleReference.getMemberReference());
+                break;
+            case MethodHandleType.INVOKE_STATIC:
+            case MethodHandleType.INVOKE_INSTANCE:
+            case MethodHandleType.INVOKE_CONSTRUCTOR:
+            case MethodHandleType.INVOKE_DIRECT:
+            case MethodHandleType.INVOKE_INTERFACE:
+                memberReference = dexBuilder.internMethodReference(
+                        (MethodReference) methodHandleReference.getMemberReference());
+                break;
+            default:
+                throw new ExceptionWithContext("Invalid method handle type: %d",
+                        methodHandleReference.getMethodHandleType());
+        }
+
+        internedMethodHandle = new BuilderMethodHandleReference(methodHandleReference.getMethodHandleType(),
+                memberReference);
+        BuilderMethodHandleReference prev = internedItems.putIfAbsent(internedMethodHandle, internedMethodHandle);
+        return prev == null ? internedMethodHandle : prev;
+    }
+
+    @Override
+    public BuilderFieldReference getFieldReference(BuilderMethodHandleReference methodHandleReference) {
+        return (BuilderFieldReference) methodHandleReference.getMemberReference();
+    }
+
+    @Override
+    public BuilderMethodReference getMethodReference(BuilderMethodHandleReference methodHandleReference) {
+        return (BuilderMethodReference) methodHandleReference.getMemberReference();
+    }
+
+    @Override
+    public int getItemIndex(@Nonnull BuilderMethodHandleReference builderMethodHandleReference) {
+        return builderMethodHandleReference.index;
+    }
+
+    @Nonnull
+    @Override
+    public Collection<? extends Map.Entry<? extends BuilderMethodHandleReference, Integer>> getItems() {
+        return new BuilderMapEntryCollection<BuilderMethodHandleReference>(internedItems.values()) {
+            @Override
+            protected int getValue(@Nonnull BuilderMethodHandleReference builderMethodHandleReference) {
+                return builderMethodHandleReference.index;
+            }
+
+            @Override
+            protected int setValue(@Nonnull BuilderMethodHandleReference builderMethodHandleReference, int value) {
+                int prev = builderMethodHandleReference.index;
+                builderMethodHandleReference.index = value;
+                return prev;
+            }
+        };
+    }
+
+    @Override
+    public int getItemCount() {
+        return internedItems.size();
+    }
+}