// 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.packages;
import com.google.common.base.Predicate;
/**
* A predicate which supports error messages.
* @param <T> - the predicate is applied on T objects
*/
public interface PredicateWithMessage<T> extends Predicate<T> {
/**
* The error message to display when predicate checks param. Only makes sense to
* call this method is apply(param) returns false.
*/
public String getErrorReason(T param);
}