| /* |
| * 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; |
| |
| import com.sun.istack.NotNull; |
| import org.glassfish.jaxb.runtime.api.AccessorException; |
| import org.glassfish.jaxb.runtime.v2.model.runtime.RuntimePropertyInfo; |
| import org.glassfish.jaxb.runtime.v2.runtime.reflect.opt.OptimizedTransducedAccessorFactory; |
| import jakarta.xml.bind.annotation.XmlValue; |
| import org.xml.sax.SAXException; |
| |
| import javax.xml.datatype.XMLGregorianCalendar; |
| import javax.xml.namespace.QName; |
| import javax.xml.stream.XMLStreamException; |
| import java.io.IOException; |
| |
| |
| /** |
| * Responsible for converting a Java object to a lexical representation |
| * and vice versa. |
| * |
| * <p> |
| * An implementation of this interface hides how this conversion happens. |
| * |
| * <p> |
| * {@link Transducer}s are immutable. |
| * |
| * @author Kohsuke Kawaguchi (kk@kohsuke.org) |
| */ |
| public interface Transducer<ValueT> { |
| |
| /** |
| * If this {@link Transducer} is the default transducer for the <code>ValueT</code>, |
| * this method returns true. |
| * |
| * Used exclusively by {@link OptimizedTransducedAccessorFactory#get(RuntimePropertyInfo)} |
| */ |
| boolean isDefault(); |
| |
| /** |
| * If true, this {@link Transducer} doesn't declare any namespace, |
| * and therefore {@link #declareNamespace(Object, XMLSerializer)} is no-op. |
| * |
| * It also means that the {@link #parse(CharSequence)} method |
| * won't use the context parameter. |
| */ |
| boolean useNamespace(); |
| |
| /** |
| * Declares the namespace URIs used in the given value to {@code w}. |
| * |
| * @param o |
| * never be null. |
| * @param w |
| * may be null if {@code !{@link #useNamespace()}}. |
| */ |
| void declareNamespace( ValueT o, XMLSerializer w ) throws AccessorException; |
| |
| /** |
| * Converts the given value to its lexical representation. |
| * |
| * @param o |
| * never be null. |
| * @return |
| * always non-null valid lexical representation. |
| */ |
| @NotNull CharSequence print(@NotNull ValueT o) throws AccessorException; |
| |
| /** |
| * Converts the lexical representation to a value object. |
| * |
| * @param lexical |
| * never be null. |
| * @throws AccessorException |
| * if the transducer is used to parse an user bean that uses {@link XmlValue}, |
| * then this exception may occur when it tries to set the leaf value to the bean. |
| * @throws SAXException |
| * if the lexical form is incorrect, the error should be reported |
| * and SAXException may thrown (or it can return null to recover.) |
| */ |
| ValueT parse(CharSequence lexical) throws AccessorException, SAXException; |
| |
| /** |
| * Sends the result of the {@link #print(Object)} operation |
| * to one of the {@link XMLSerializer#text(String, String)} method, |
| * but with the best representation of the value, not necessarily String. |
| */ |
| void writeText(XMLSerializer w, ValueT o, String fieldName) throws IOException, SAXException, XMLStreamException, AccessorException; |
| |
| /** |
| * Sends the result of the {@link #print(Object)} operation |
| * to one of the {@link XMLSerializer#leafElement(Name, String, String)} method. |
| * but with the best representation of the value, not necessarily String. |
| */ |
| void writeLeafElement(XMLSerializer w, Name tagName, @NotNull ValueT o, String fieldName) throws IOException, SAXException, XMLStreamException, AccessorException; |
| |
| /** |
| * Transducers implicitly work against a single XML type, |
| * but sometimes (most notably {@link XMLGregorianCalendar}, |
| * an instance may choose different XML types. |
| * |
| * @return |
| * return non-null from this method allows transducers |
| * to specify the type it wants to marshal to. |
| * Most of the time this method returns null, in which case |
| * the implicitly associated type will be used. |
| */ |
| QName getTypeName(@NotNull ValueT instance); |
| } |