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/*
* Copyright (C) 2017 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;
import java.util.Objects;
/** DiffedFieldValue is used by the DiffedField class to return the result of
* diffing two collections of fields.
*/
public class DiffedFieldValue {
public final String name;
public final Type type;
public final Value current;
public final Value baseline;
public final Status status;
public static enum Status {
ADDED, // The current field has no matching baseline value.
MATCHED, // The current field has a matching baseline value.
DELETED // The baseline field has no matching current value.
};
/**
* Return a DiffedFieldValue where there is both a current and baseline.
*/
public static DiffedFieldValue matched(FieldValue current, FieldValue baseline) {
return new DiffedFieldValue(current.name,
current.type,
current.value,
baseline.value,
Status.MATCHED);
}
/**
* Return a DiffedFieldValue where there is no baseline.
*/
public static DiffedFieldValue added(FieldValue current) {
return new DiffedFieldValue(current.name, current.type, current.value, null, Status.ADDED);
}
/**
* Return a DiffedFieldValue where there is no current.
*/
public static DiffedFieldValue deleted(FieldValue baseline) {
return new DiffedFieldValue(baseline.name, baseline.type, null, baseline.value, Status.DELETED);
}
private DiffedFieldValue(String name, Type type, Value current, Value baseline, Status status) {
this.name = name;
this.type = type;
this.current = current;
this.baseline = baseline;
this.status = status;
}
@Override
public boolean equals(Object otherObject) {
if (otherObject instanceof DiffedFieldValue) {
DiffedFieldValue other = (DiffedFieldValue)otherObject;
return name.equals(other.name)
&& type.equals(other.type)
&& Objects.equals(current, other.current)
&& Objects.equals(baseline, other.baseline)
&& Objects.equals(status, other.status);
}
return false;
}
@Override
public String toString() {
switch (status) {
case ADDED:
return "(" + name + " " + type + " +" + current + ")";
case MATCHED:
return "(" + name + " " + type + " " + current + " " + baseline + ")";
case DELETED:
return "(" + name + " " + type + " -" + baseline + ")";
default:
// There are no other members.
throw new AssertionError("unsupported enum member");
}
}
}
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