1 files changed, 133 insertions, 0 deletions
diff --git a/tools/ahat/src/heapdump/Value.java b/tools/ahat/src/heapdump/Value.java
new file mode 100644
index 0000000000..6b2d38f7b1
--- /dev/null
+++ b/tools/ahat/src/heapdump/Value.java
@@ -0,0 +1,133 @@
+/*
+ * Copyright (C) 2016 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.ahat.heapdump;
+
+/**
+ * Value represents a field value in a heap dump. The field value is either a
+ * subclass of AhatInstance or a primitive Java type.
+ */
+public class Value {
+  private Object mObject;
+
+  /**
+   * Constructs a value from a generic Java Object.
+   * The Object must either be a boxed Java primitive type or a subclass of
+   * AhatInstance. The object must not be null.
+   */
+  Value(Object object) {
+    // TODO: Check that the Object is either an AhatSnapshot or boxed Java
+    // primitive type?
+    assert object != null;
+    mObject = object;
+  }
+
+  /**
+   * Returns true if the Value is an AhatInstance, as opposed to a Java
+   * primitive value.
+   */
+  public boolean isAhatInstance() {
+    return mObject instanceof AhatInstance;
+  }
+
+  /**
+   * Return the Value as an AhatInstance if it is one.
+   * Returns null if the Value represents a Java primitive value.
+   */
+  public AhatInstance asAhatInstance() {
+    if (isAhatInstance()) {
+      return (AhatInstance)mObject;
+    }
+    return null;
+  }
+
+  /**
+   * Returns true if the Value is an Integer.
+   */
+  public boolean isInteger() {
+    return mObject instanceof Integer;
+  }
+
+  /**
+   * Return the Value as an Integer if it is one.
+   * Returns null if the Value does not represent an Integer.
+   */
+  public Integer asInteger() {
+    if (isInteger()) {
+      return (Integer)mObject;
+    }
+    return null;
+  }
+
+  /**
+   * Returns true if the Value is an Long.
+   */
+  public boolean isLong() {
+    return mObject instanceof Long;
+  }
+
+  /**
+   * Return the Value as an Long if it is one.
+   * Returns null if the Value does not represent an Long.
+   */
+  public Long asLong() {
+    if (isLong()) {
+      return (Long)mObject;
+    }
+    return null;
+  }
+
+  /**
+   * Return the Value as a Byte if it is one.
+   * Returns null if the Value does not represent a Byte.
+   */
+  public Byte asByte() {
+    if (mObject instanceof Byte) {
+      return (Byte)mObject;
+    }
+    return null;
+  }
+
+  /**
+   * Return the Value as a Char if it is one.
+   * Returns null if the Value does not represent a Char.
+   */
+  public Character asChar() {
+    if (mObject instanceof Character) {
+      return (Character)mObject;
+    }
+    return null;
+  }
+
+  public String toString() {
+    return mObject.toString();
+  }
+
+  public static Value getBaseline(Value value) {
+    if (value == null || !value.isAhatInstance()) {
+      return value;
+    }
+    return new Value(value.asAhatInstance().getBaseline());
+  }
+
+  @Override public boolean equals(Object other) {
+    if (other instanceof Value) {
+      Value value = (Value)other;
+      return mObject.equals(value.mObject);
+    }
+    return false;
+  }
+}