| /* |
| * Copyright 2018 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 android.view.inspector; |
| |
| import android.annotation.NonNull; |
| import android.annotation.Nullable; |
| |
| import java.util.ArrayList; |
| |
| /** |
| * Maps the values of an {int} property to string names for properties that encode enumerations. |
| * |
| * An {@link InspectionCompanion} may provide an instance of this class to a {@link PropertyMapper} |
| * for enumerations packed into primitive {int} properties. |
| * |
| * This class is immutable, and must be constructed by a {@link Builder}. |
| * |
| * @see PropertyMapper#mapIntEnum(String, int, IntEnumMapping) |
| */ |
| public final class IntEnumMapping { |
| private final Value[] mValues; |
| |
| /** |
| * Map from a property value to a string name. |
| * |
| * @param value The value of a property |
| * @return The name of the enumeration value, null if the value is not mapped |
| */ |
| @Nullable |
| public String nameOf(int value) { |
| for (Value valueTuple : mValues) { |
| if (valueTuple.mValue == value) { |
| return valueTuple.mName; |
| } |
| } |
| |
| return null; |
| } |
| |
| /** |
| * Create a new instance from a builder. |
| * |
| * This constructor is private, use {@link Builder#build()} instead. |
| * |
| * @param builder A builder to create from |
| */ |
| private IntEnumMapping(Builder builder) { |
| mValues = builder.mValues.toArray(new Value[builder.mValues.size()]); |
| } |
| |
| /** |
| * A builder for {@link IntEnumMapping} |
| */ |
| public static final class Builder { |
| private final ArrayList<Value> mValues; |
| |
| public Builder() { |
| mValues = new ArrayList<>(); |
| } |
| |
| /** |
| * Add a new entry to this mapping. |
| * |
| * @param name Name of the enumeration value |
| * @param value Int value of the enumeration value |
| * @return This builder |
| */ |
| @NonNull |
| public Builder addValue(@NonNull String name, int value) { |
| mValues.add(new Value(name, value)); |
| return this; |
| } |
| |
| /** |
| * Clear the builder, allowing for recycling. |
| */ |
| public void clear() { |
| mValues.clear(); |
| } |
| |
| /** |
| * Build a new {@link IntEnumMapping} from this builder |
| * |
| * @return A new mapping |
| */ |
| @NonNull |
| public IntEnumMapping build() { |
| return new IntEnumMapping(this); |
| } |
| } |
| |
| /** |
| * Inner class that holds the name and value of an enumeration value. |
| */ |
| private static final class Value { |
| @NonNull private final String mName; |
| private final int mValue; |
| |
| private Value(@NonNull String name, int value) { |
| mName = name; |
| mValue = value; |
| } |
| } |
| } |