// Copyright 2014 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.lib.rules;
import com.google.devtools.build.lib.analysis.TransitiveInfoCollection;
import com.google.devtools.build.lib.util.Preconditions;
/**
* An abstract class for adding a Skylark API for the native providers.
* Derived classes should declare functions to be used from Skylark.
*/
public abstract class SkylarkApiProvider {
private TransitiveInfoCollection info;
protected TransitiveInfoCollection getInfo() {
return info;
}
/** Must be called once (and only once). */
public void init(TransitiveInfoCollection info) {
Preconditions.checkState(this.info == null);
this.info = Preconditions.checkNotNull(info);
}
}