/*
* 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.facebook.buck.util.HumanReadableException;
import com.facebook.buck.util.MoreCollectors;
import java.nio.file.Path;
import java.util.List;
/**
* {@link TypeCoercer} that takes a list of strings and transforms it into a {@link
* BuildConfigFields}. This class takes care of parsing each string, making sure it conforms to the
* specification in {@link BuildConfigFields}.
*/
public class BuildConfigFieldsTypeCoercer extends LeafTypeCoercer<BuildConfigFields> {
@Override
public Class<BuildConfigFields> getOutputClass() {
return BuildConfigFields.class;
}
@Override
public BuildConfigFields coerce(
CellPathResolver cellRoots,
ProjectFilesystem filesystem,
Path pathRelativeToProjectRoot,
Object object)
throws CoerceFailedException {
if (!(object instanceof List)) {
throw CoerceFailedException.simple(object, getOutputClass());
}
List<?> list = (List<?>) object;
List<String> values =
list.stream()
.map(
input -> {
if (input instanceof String) {
return (String) input;
} else {
throw new HumanReadableException(
"Expected string for build config values but was: %s", input);
}
})
.collect(MoreCollectors.toImmutableList());
return BuildConfigFields.fromFieldDeclarations(values);
}
}