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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.build.android.resources;
import com.android.resources.ResourceType;
import com.google.common.base.MoreObjects;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableSortedMap;
import com.google.common.collect.Sets;
import java.util.Collection;
import java.util.EnumMap;
import java.util.Iterator;
import java.util.Map;
import java.util.TreeMap;
/**
* Represents a collection of resource symbols and values suitable for writing java sources and
* classes.
*/
public class FieldInitializers
implements Iterable<Map.Entry<ResourceType, Map<String, FieldInitializer>>> {
private final Map<ResourceType, Map<String, FieldInitializer>> initializers;
private FieldInitializers(Map<ResourceType, Map<String, FieldInitializer>> initializers) {
this.initializers = initializers;
}
/** Creates a {@link FieldInitializers} copying the contents from a {@link Map}. */
public static FieldInitializers copyOf(
Map<ResourceType, Map<String, FieldInitializer>> initializers) {
return new FieldInitializers(ImmutableMap.copyOf(initializers));
}
public static FieldInitializers mergedFrom(Collection<FieldInitializers> toMerge) {
final Map<ResourceType, Map<String, FieldInitializer>> merged =
new EnumMap<>(ResourceType.class);
for (FieldInitializers mergee : toMerge) {
for (Map.Entry<ResourceType, Map<String, FieldInitializer>> entry : mergee) {
final Map<String, FieldInitializer> fieldMap =
merged.containsKey(entry.getKey())
? merged.get(entry.getKey())
: new TreeMap<String, FieldInitializer>();
merged.put(entry.getKey(), fieldMap);
for (Map.Entry<String, FieldInitializer> field : entry.getValue().entrySet()) {
fieldMap.put(field.getKey(), field.getValue());
}
}
}
return copyOf(merged);
}
public Iterable<Map.Entry<ResourceType, Map<String, FieldInitializer>>> filter(
FieldInitializers fieldsToWrite) {
Map<ResourceType, Map<String, FieldInitializer>> initializersToWrite =
new EnumMap<>(ResourceType.class);
for (Map.Entry<ResourceType, Map<String, FieldInitializer>> entry :
fieldsToWrite.initializers.entrySet()) {
if (initializers.containsKey(entry.getKey())) {
final Map<String, FieldInitializer> valueFields = initializers.get(entry.getKey());
final ImmutableMap.Builder<String, FieldInitializer> fields =
ImmutableSortedMap.naturalOrder();
// Resource type may be missing if resource overriding eliminates resources at the binary
// level, which were originally present at the library level.
for (String fieldName :
Sets.intersection(entry.getValue().keySet(), valueFields.keySet())) {
fields.put(fieldName, valueFields.get(fieldName));
}
initializersToWrite.put(entry.getKey(), fields.build());
}
}
return initializersToWrite.entrySet();
}
@Override
public Iterator<Map.Entry<ResourceType, Map<String, FieldInitializer>>> iterator() {
return initializers.entrySet().iterator();
}
@Override
public String toString() {
return MoreObjects.toStringHelper(FieldInitializers.class)
.add("initializers", initializers)
.toString();
}
}
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