/*
* Copyright (c) MuleSoft, Inc. All rights reserved. http://www.mulesoft.com
* The software in this package is published under the terms of the CPAL v1.0
* license, a copy of which has been included with this distribution in the
* LICENSE.txt file.
*/
package org.mule.runtime.module.extension.internal.runtime.resolver;
import org.mule.metadata.api.model.MetadataType;
import org.mule.runtime.api.exception.MuleException;
import org.mule.runtime.api.exception.MuleRuntimeException;
import org.mule.runtime.api.lifecycle.Initialisable;
import org.mule.runtime.api.lifecycle.InitialisationException;
import org.mule.runtime.core.api.TransformationService;
import org.mule.runtime.core.api.el.ExtendedExpressionManager;
import org.mule.runtime.extension.api.runtime.parameter.ParameterResolver;
import java.util.Optional;
import javax.inject.Inject;
/**
* {@link ParameterResolver} implementation for the parameters that are resolved from an expression
*
* @param <T> Concrete parameter type to be resolved
* @since 4.0
*/
class ExpressionBasedParameterResolver<T> implements ParameterResolver<T>, Initialisable {
private final String expression;
private final ValueResolvingContext context;
private final MetadataType metadataType;
private TypeSafeExpressionValueResolver<T> valueResolver;
@Inject
private TransformationService transformationService;
@Inject
private ExtendedExpressionManager extendedExpressionManager;
ExpressionBasedParameterResolver(String expression, MetadataType metadataType, ValueResolvingContext context) {
this.expression = expression;
this.context = context;
this.metadataType = metadataType;
}
/**
* {@inheritDoc}
*/
@Override
public T resolve() {
try {
return valueResolver.resolve(context);
} catch (MuleException e) {
throw new MuleRuntimeException(e);
}
}
/**
* {@inheritDoc}
*/
@Override
public Optional<String> getExpression() {
return Optional.ofNullable(expression);
}
@Override
public void initialise() throws InitialisationException {
valueResolver = new TypeSafeExpressionValueResolver<>(expression, metadataType);
valueResolver.setExtendedExpressionManager(extendedExpressionManager);
valueResolver.setTransformationService(transformationService);
valueResolver.initialise();
}
public void setTransformationService(TransformationService transformationService) {
this.transformationService = transformationService;
}
public void setExtendedExpressionManager(ExtendedExpressionManager extendedExpressionManager) {
this.extendedExpressionManager = extendedExpressionManager;
}
}