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// Copyright 2017 The Bazel Authors. All rights reserved.
//
// 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.devtools.common.options.testing;
import com.google.common.collect.ForwardingMap;
import com.google.common.collect.ImmutableMap;
import com.google.devtools.common.options.Converter;
import java.util.Map;
/**
* An immutable mapping from {@link Converter} classes to {@link ConverterTester}s which test them.
*
* <p>Note that the ConverterTesters within are NOT immutable.
*/
public final class ConverterTesterMap
extends ForwardingMap<Class<? extends Converter<?>>, ConverterTester> {
private final ImmutableMap<Class<? extends Converter<?>>, ConverterTester> delegate;
private ConverterTesterMap(
ImmutableMap<Class<? extends Converter<?>>, ConverterTester> delegate) {
this.delegate = delegate;
}
@Override
protected Map<Class<? extends Converter<?>>, ConverterTester> delegate() {
return delegate;
}
/** A builder to construct new {@link ConverterTesterMap}s. */
public static final class Builder {
private final ImmutableMap.Builder<Class<? extends Converter<?>>, ConverterTester> delegate;
public Builder() {
this.delegate = ImmutableMap.builder();
}
/**
* Adds a new ConverterTester, mapping it to the class of converter it tests. Only one tester
* for each class is permitted; duplicates will cause {@link #build} to fail.
*/
public Builder add(ConverterTester item) {
delegate.put(item.getConverterClass(), item);
return this;
}
/**
* Adds the entries from the given {@link ConverterTesterMap}. Only one tester for each class is
* permitted; duplicates will cause {@link #build} to fail.
*/
public Builder addAll(ConverterTesterMap map) {
// this is safe because we know the other map was constructed the same way this one was
delegate.putAll(map);
return this;
}
/**
* Adds all of the ConverterTesters from the given iterable. Only one tester for each class is
* permitted; duplicates will cause {@link #build} to fail.
*/
public Builder addAll(Iterable<ConverterTester> items) {
items.forEach(this::add);
return this;
}
public ConverterTesterMap build() {
return new ConverterTesterMap(delegate.build());
}
}
}
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