/*
* Copyright 2014-present Facebook, 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.facebook.buck.rules.coercer;
import com.facebook.buck.io.ProjectFilesystem;
import com.facebook.buck.rules.CellPathResolver;
import com.google.common.collect.ImmutableSortedMap;
import java.nio.file.Path;
import java.util.Map;
public class SortedMapTypeCoercer<K extends Comparable<K>, V>
implements TypeCoercer<ImmutableSortedMap<K, V>> {
private final TypeCoercer<K> keyTypeCoercer;
private final TypeCoercer<V> valueTypeCoercer;
SortedMapTypeCoercer(TypeCoercer<K> keyTypeCoercer, TypeCoercer<V> valueTypeCoercer) {
this.keyTypeCoercer = keyTypeCoercer;
this.valueTypeCoercer = valueTypeCoercer;
}
@SuppressWarnings("unchecked")
@Override
public Class<ImmutableSortedMap<K, V>> getOutputClass() {
return (Class<ImmutableSortedMap<K, V>>) (Class<?>) ImmutableSortedMap.class;
}
@Override
public boolean hasElementClass(Class<?>... types) {
return keyTypeCoercer.hasElementClass(types) || valueTypeCoercer.hasElementClass(types);
}
@Override
public void traverse(ImmutableSortedMap<K, V> object, TypeCoercer.Traversal traversal) {
traversal.traverse(object);
for (Map.Entry<K, V> element : object.entrySet()) {
keyTypeCoercer.traverse(element.getKey(), traversal);
valueTypeCoercer.traverse(element.getValue(), traversal);
}
}
@Override
public ImmutableSortedMap<K, V> coerce(
CellPathResolver cellRoots,
ProjectFilesystem filesystem,
Path pathRelativeToProjectRoot,
Object object)
throws CoerceFailedException {
if (object instanceof Map) {
ImmutableSortedMap.Builder<K, V> builder = ImmutableSortedMap.naturalOrder();
for (Map.Entry<?, ?> entry : ((Map<?, ?>) object).entrySet()) {
K key =
keyTypeCoercer.coerce(cellRoots, filesystem, pathRelativeToProjectRoot, entry.getKey());
V value =
valueTypeCoercer.coerce(
cellRoots, filesystem, pathRelativeToProjectRoot, entry.getValue());
builder.put(key, value);
}
return builder.build();
} else {
throw CoerceFailedException.simple(object, getOutputClass());
}
}
}