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package com.sun.xml.bind.v2.runtime;


import javax.xml.namespace.QName;

import com.sun.istack.NotNull;
import com.sun.xml.bind.api.AccessorException;

import org.xml.sax.SAXException;

 * {@link Transducer} that delegates to another {@link Transducer}.
 * @author Kohsuke Kawaguchi
public abstract class FilterTransducer<T> implements Transducer<T> {
    protected final Transducer<T> core;

    protected FilterTransducer(Transducer<T> core) {
        this.core = core;

    public final boolean isDefault() {
        // this must be used as a decorating transducer,
        // so it may never be default.
        return false;

    public boolean useNamespace() {
        return core.useNamespace();

    public void declareNamespace(T o, XMLSerializer w) throws AccessorException {
        core.declareNamespace(o, w);

    public @NotNull CharSequence print(@NotNull T o) throws AccessorException {
        return core.print(o);

    public T parse(CharSequence lexical) throws AccessorException, SAXException {
        return core.parse(lexical);

    public void writeText(XMLSerializer w, T o, String fieldName) throws IOException, SAXException, XMLStreamException, AccessorException {
        core.writeText(w, o, fieldName);

    public void writeLeafElement(XMLSerializer w, Name tagName, T o, String fieldName) throws IOException, SAXException, XMLStreamException, AccessorException {

    public QName getTypeName(T instance) {
        return null;
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