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Common Expression Language Validators for Java

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// Copyright 2022 Google LLC
//
// 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
//
//      https://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 dev.cel.runtime;

import dev.cel.common.annotations.Internal;
import org.jspecify.nullness.Nullable;

/**
 * An interface describing an object that can perform a lookup on a given name, returning the value
 * associated with the so-named global variable.
 *
 * CEL Library Internals. Do Not Use.
 */
@FunctionalInterface
@Internal
public interface GlobalResolver {

  /** Resolves the given name to its value. Returns null if resolution fails. */
  @Nullable Object resolve(String name);
}