org.glassfish.jaxb.runtime.v2.runtime.unmarshaller.ProxyLoader Maven / Gradle / Ivy
/*
* Copyright (c) 1997, 2020 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Distribution License v. 1.0, which is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
package org.glassfish.jaxb.runtime.v2.runtime.unmarshaller;
import org.xml.sax.SAXException;
/**
* {@link Loader} that delegates the processing to another {@link Loader}
* at {@link #startElement(UnmarshallingContext.State, TagName)}.
*
* @author Kohsuke Kawaguchi
*/
public abstract class ProxyLoader extends Loader {
public ProxyLoader() {
super(false);
}
@Override
public final void startElement(UnmarshallingContext.State state, TagName ea) throws SAXException {
Loader loader = selectLoader(state,ea);
state.setLoader(loader);
loader.startElement(state,ea);
}
/**
* Picks the loader to delegate to.
*
* @return never null.
*/
protected abstract Loader selectLoader(UnmarshallingContext.State state, TagName ea) throws SAXException;
@Override
public final void leaveElement(UnmarshallingContext.State state, TagName ea) {
// this loader is used just to forward to another loader,
// so we should never get this event.
throw new IllegalStateException();
}
}