?? transformer.java
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/* * $Id: Transformer.java 12422 2008-07-29 19:28:48Z tcarlson $ * -------------------------------------------------------------------------------------- * Copyright (c) MuleSource, Inc. All rights reserved. http://www.mulesource.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.api.transformer;import java.util.List;/** * <code>Transformer</code> can be chained together to covert message payloads * from one object type to another. */public interface Transformer extends BaseTransformer{ /** * Determines if a particular source class can be handled by this transformer * * @param aClass The class to check for compatability * @return true if the transformer supports this type of class or false * otherwise */ boolean isSourceTypeSupported(Class aClass); /** * Returns an unmodifiable list of Source types registered on this transformer * * @return an unmodifiable list of Source types registered on this transformer */ List getSourceTypes(); /** * Does this transformer allow null input? * * @return true if this transformer can accept null input */ boolean isAcceptNull(); boolean isIgnoreBadInput(); /** * Thransforms the supplied data and returns the result * * @param src the data to transform * @return the transformed data * @throws TransformerException if a error occurs transforming the data or if the * expected returnClass isn't the same as the transformed data */ Object transform(Object src) throws TransformerException; /** * Sets the expected return type for the transformed data. If the transformed * data is not of this class type a <code>TransformerException</code> will be * thrown. * * @param theClass the expected return type class */ void setReturnClass(Class theClass); /** @return the exceptedreturn type */ Class getReturnClass();}
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