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Spring Expression Language (SpEL)

There is a newer version: 6.2.0

/*
 * Copyright 2002-2017 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.expression.spel;

import org.springframework.expression.EvaluationContext;
import org.springframework.expression.EvaluationException;
import org.springframework.lang.Nullable;

/**
 * Base superclass for compiled expressions. Each generated compiled expression class
 * will extend this class and implement the {@link #getValue} method. It is not intended
 * to be subclassed by user code.
 *
 * @author Andy Clement
 * @since 4.1
 */
public abstract class CompiledExpression {

	/**
	 * Subclasses of CompiledExpression generated by SpelCompiler will provide an
	 * implementation of this method.
	 */
	public abstract Object getValue(@Nullable Object target, @Nullable EvaluationContext context)
			throws EvaluationException;

}