/*
* 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.core.el.mvel.datatype;
import org.mule.runtime.core.api.Event;
import org.mule.runtime.api.metadata.DataType;
import org.mule.mvel2.ast.ASTNode;
import org.mule.mvel2.compiler.CompiledExpression;
import org.mule.mvel2.util.ASTIterator;
import org.mule.mvel2.util.ASTLinkedList;
/**
* Base class for extracting data type from {@link CompiledExpression}
*/
public abstract class AbstractExpressionDataTypeResolver implements ExpressionDataTypeResolver {
@Override
public DataType resolve(Event event, CompiledExpression compiledExpression) {
ASTIterator iterator = new ASTLinkedList(compiledExpression.getFirstNode());
if (!iterator.hasMoreNodes()) {
return null;
} else {
ASTNode node = iterator.nextNode();
return getDataType(event, node);
}
}
protected abstract DataType getDataType(Event event, ASTNode node);
}