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/*
* 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.
*/
public 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;
}
}
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