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/*
* Copyright (C) 2017 Google Inc.
*
* 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.google.android.mobly.snippet.bundled.utils;
import com.google.common.collect.ImmutableBiMap;
import com.google.errorprone.annotations.CanIgnoreReturnValue;
/**
* A container type for handling String-Integer enum conversion in Rpc protocol.
*
* <p>In Serializing/Deserializing Android API enums, we often need to convert an enum value from
* one form to another. This container class makes it easier to do so.
*
* <p>Once built, an RpcEnum object is immutable.
*/
public class RpcEnum {
private final ImmutableBiMap<String, Integer> enums;
private RpcEnum(ImmutableBiMap.Builder<String, Integer> builder) {
enums = builder.buildOrThrow();
}
/**
* Get the int value of an enum based on its String value.
*
* @param enumString
* @return int value
*/
public int getInt(String enumString) {
Integer result = enums.get(enumString);
if (result == null) {
throw new NoSuchFieldError("No int value found for: " + enumString);
}
return result;
}
/**
* Get the String value of an enum based on its int value.
*
* @param enumInt
* @return string value
*/
public String getString(int enumInt) {
String result = enums.inverse().get(enumInt);
if (result == null) {
return String.format("UNKNOWN_VALUE[%s].", enumInt);
}
return result;
}
/** Builder for RpcEnum. */
public static class Builder {
private final ImmutableBiMap.Builder<String, Integer> builder;
public Builder() {
builder = new ImmutableBiMap.Builder<>();
}
/**
* Add an enum String-Integer pair.
*
* @param enumString
* @param enumInt
* @return
*/
@CanIgnoreReturnValue
public Builder add(String enumString, int enumInt) {
builder.put(enumString, enumInt);
return this;
}
public RpcEnum build() {
return new RpcEnum(builder);
}
}
}
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