io.micronaut.context.expressions.AbstractEvaluatedExpression Maven / Gradle / Ivy
/*
* Copyright 2017-2020 original 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 io.micronaut.context.expressions;
import io.micronaut.context.exceptions.ExpressionEvaluationException;
import io.micronaut.core.expressions.EvaluatedExpression;
import io.micronaut.core.expressions.ExpressionEvaluationContext;
import io.micronaut.core.annotation.Internal;
import io.micronaut.core.annotation.UsedByGeneratedCode;
/**
* Default implementation for evaluated expressions. This class is subclassed
* by evaluated expressions classes at compilation time.
*
* @author Sergey Gavrilov
* @since 4.0.0
*/
@Internal
@UsedByGeneratedCode
public abstract class AbstractEvaluatedExpression implements EvaluatedExpression {
private final Object initialAnnotationValue;
public AbstractEvaluatedExpression(Object initialAnnotationValue) {
this.initialAnnotationValue = initialAnnotationValue;
}
@Override
public final Object evaluate(ExpressionEvaluationContext evaluationContext) {
try (evaluationContext) {
return doEvaluate(evaluationContext);
} catch (Throwable ex) {
throw new ExpressionEvaluationException(
"Can not evaluate expression [" + initialAnnotationValue + "]. " + ex.getMessage(), ex);
}
}
/**
* This method is overridden by expression classes generated at compilation time and
* contains concrete expression evaluation logic.
*
* @param evaluationContext context used for expression evaluation
* @return evaluation result
*/
protected Object doEvaluate(ExpressionEvaluationContext evaluationContext) {
return initialAnnotationValue;
}
@Override
public String toString() {
return initialAnnotationValue.toString();
}
}