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// Copyright 2023 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.bundle;
import dev.cel.checker.CelCheckerLegacyImpl;
import dev.cel.common.CelOptions;
import dev.cel.compiler.CelCompiler;
import dev.cel.compiler.CelCompilerImpl;
import dev.cel.parser.CelParserImpl;
import dev.cel.runtime.CelRuntime;
import dev.cel.runtime.CelRuntimeImpl;
import dev.cel.runtime.CelRuntimeLegacyImpl;
/** Helper class to configure the entire CEL stack in a common interface. */
public final class CelFactory {
private CelFactory() {}
/**
* Creates a builder for configuring CEL using current parser for the parse, type-check, and eval
* of expressions.
*
* <p>Note, the {@link CelOptions#current}, standard CEL function libraries, and linked message
* evaluation are enabled by default.
*/
public static CelBuilder standardCelBuilder() {
return CelImpl.newBuilder(
CelCompilerImpl.newBuilder(
CelParserImpl.newBuilder(), CelCheckerLegacyImpl.newBuilder()),
CelRuntimeLegacyImpl.newBuilder())
.setOptions(CelOptions.current().build())
// CEL-Internal-2
.setStandardEnvironmentEnabled(true);
}
/**
* Creates a builder for configuring CEL for the parsing, optional type-checking, and evaluation
* of expressions using the Program Planner.
*
* <p>The {@code ProgramPlanner} architecture provides key benefits over the {@link
* #standardCelBuilder()}:
*
* <ul>
* <li><b>Performance:</b> Programs can be cached for improving evaluation speed.
* <li><b>Parsed-only expression evaluation:</b> Unlike the traditional stack which required
* supplying type-checked expressions, this architecture handles both parsed-only and
* type-checked expressions.
* </ul>
*/
public static CelBuilder plannerCelBuilder() {
return CelImpl.newBuilder(
CelCompilerImpl.newBuilder(
CelParserImpl.newBuilder(),
CelCheckerLegacyImpl.newBuilder().setStandardEnvironmentEnabled(true)),
CelRuntimeImpl.newBuilder())
// CEL-Internal-2
.setOptions(CelOptions.current().enableHeterogeneousNumericComparisons(true).build());
}
/** Combines a prebuilt {@link CelCompiler} and {@link CelRuntime} into {@link Cel}. */
public static Cel combine(CelCompiler celCompiler, CelRuntime celRuntime) {
return CelImpl.combine(celCompiler, celRuntime);
}
}