spring security ExpressionUtils 源码
spring security ExpressionUtils 代码
文件路径：/core/src/main/java/org/springframework/security/access/expression/ExpressionUtils.java
/*
* Copyright 2002-2016 the original author or authors.
*
* 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 org.springframework.security.access.expression;
import org.springframework.expression.EvaluationContext;
import org.springframework.expression.EvaluationException;
import org.springframework.expression.Expression;
public final class ExpressionUtils {
private ExpressionUtils() {
}
public static boolean evaluateAsBoolean(Expression expr, EvaluationContext ctx) {
try {
return expr.getValue(ctx, Boolean.class);
}
catch (EvaluationException ex) {
throw new IllegalArgumentException("Failed to evaluate expression '" + expr.getExpressionString() + "'",
ex);
}
}
}
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