javax.xml.stream.XMLStreamWriter#getNamespaceContext ( )源码实例Demo

public OutTransformWriter(XMLStreamWriter writer,
                          Map<String, String> outEMap,
                          Map<String, String> append,
                          List<String> dropEls,
                          Map<String, String> outAMap,
                          boolean attributesToElements,
                          String defaultNamespace) {
    super(writer);
    elementsMap = new QNamesMap(outEMap == null ? 0 : outEMap.size());
    attributesMap = new QNamesMap(outAMap == null ? 0 : outAMap.size());
    TransformUtils.convertToQNamesMap(outEMap, elementsMap, nsMap);
    TransformUtils.convertToQNamesMap(outAMap, attributesMap, null);

    TransformUtils.convertToMapOfElementProperties(append, appendMap);
    dropElements = DOMUtils.convertStringsToQNames(dropEls);
    this.attributesToElements = attributesToElements;
    namespaceContext = new DelegatingNamespaceContext(
        writer.getNamespaceContext(), nsMap);
    this.defaultNamespace = defaultNamespace;
}
 

/**
 * sets undeclared prefixes on the writer
 * @param prefix
 * @param writer
 * @throws XMLStreamException
 */
private static void setUndeclaredPrefix(String prefix, String readerURI, XMLStreamWriter writer) throws XMLStreamException {
    String writerURI = null;
    if (writer.getNamespaceContext() != null) {
        writerURI = writer.getNamespaceContext().getNamespaceURI(prefix);
    }

    if (writerURI == null) {
        writer.setPrefix(prefix, readerURI != null ? readerURI : "");
        writer.writeNamespace(prefix, readerURI != null ? readerURI : "");
    }
}
 

private static boolean isPrefixDeclared(XMLStreamWriter writer, String nsUri, String prefix) {
    boolean prefixDecl = false;
    NamespaceContext nscontext = writer.getNamespaceContext();
    Iterator prefixItr = nscontext.getPrefixes(nsUri);
    while (prefixItr.hasNext()) {
        if (prefix.equals(prefixItr.next())) {
            prefixDecl = true;
            break;
        }
    }
    return prefixDecl;
}
 

/**
 * sets undeclared prefixes on the writer
 * @param prefix
 * @param writer
 * @throws XMLStreamException
 */
private static void setUndeclaredPrefix(String prefix, String readerURI, XMLStreamWriter writer) throws XMLStreamException {
    String writerURI = null;
    if (writer.getNamespaceContext() != null) {
        writerURI = writer.getNamespaceContext().getNamespaceURI(prefix);
    }

    if (writerURI == null) {
        writer.setPrefix(prefix, readerURI != null ? readerURI : "");
        writer.writeNamespace(prefix, readerURI != null ? readerURI : "");
    }
}
 

private static boolean isPrefixDeclared(XMLStreamWriter writer, String nsUri, String prefix) {
    boolean prefixDecl = false;
    NamespaceContext nscontext = writer.getNamespaceContext();
    Iterator prefixItr = nscontext.getPrefixes(nsUri);
    while (prefixItr.hasNext()) {
        if (prefix.equals(prefixItr.next())) {
            prefixDecl = true;
            break;
        }
    }
    return prefixDecl;
}
 

/**
 * sets undeclared prefixes on the writer
 * @param prefix
 * @param writer
 * @throws XMLStreamException
 */
private static void setUndeclaredPrefix(String prefix, String readerURI, XMLStreamWriter writer) throws XMLStreamException {
    String writerURI = null;
    if (writer.getNamespaceContext() != null) {
        writerURI = writer.getNamespaceContext().getNamespaceURI(prefix);
    }

    if (writerURI == null) {
        writer.setPrefix(prefix, readerURI != null ? readerURI : "");
        writer.writeNamespace(prefix, readerURI != null ? readerURI : "");
    }
}
 

private static boolean isPrefixDeclared(XMLStreamWriter writer, String nsUri, String prefix) {
    boolean prefixDecl = false;
    NamespaceContext nscontext = writer.getNamespaceContext();
    Iterator prefixItr = nscontext.getPrefixes(nsUri);
    while (prefixItr.hasNext()) {
        if (prefix.equals(prefixItr.next())) {
            prefixDecl = true;
            break;
        }
    }
    return prefixDecl;
}
 

/**
 * sets undeclared prefixes on the writer
 * @param prefix
 * @param writer
 * @throws XMLStreamException
 */
private static void setUndeclaredPrefix(String prefix, String readerURI, XMLStreamWriter writer) throws XMLStreamException {
    String writerURI = null;
    if (writer.getNamespaceContext() != null) {
        writerURI = writer.getNamespaceContext().getNamespaceURI(prefix);
    }

    if (writerURI == null) {
        writer.setPrefix(prefix, readerURI != null ? readerURI : "");
        writer.writeNamespace(prefix, readerURI != null ? readerURI : "");
    }
}
 

private static boolean isPrefixDeclared(XMLStreamWriter writer, String nsUri, String prefix) {
    boolean prefixDecl = false;
    NamespaceContext nscontext = writer.getNamespaceContext();
    Iterator prefixItr = nscontext.getPrefixes(nsUri);
    while (prefixItr.hasNext()) {
        if (prefix.equals(prefixItr.next())) {
            prefixDecl = true;
            break;
        }
    }
    return prefixDecl;
}
 

/**
 * sets undeclared prefixes on the writer
 * @param prefix
 * @param writer
 * @throws XMLStreamException
 */
private static void setUndeclaredPrefix(String prefix, String readerURI, XMLStreamWriter writer) throws XMLStreamException {
    String writerURI = null;
    if (writer.getNamespaceContext() != null) {
        writerURI = writer.getNamespaceContext().getNamespaceURI(prefix);
    }

    if (writerURI == null) {
        writer.setPrefix(prefix, readerURI != null ? readerURI : "");
        writer.writeNamespace(prefix, readerURI != null ? readerURI : "");
    }
}
 

private static final String typeLexicalName(final QName name, final XMLStreamWriter context) {
    final NamespaceContext namespaceContext = context.getNamespaceContext();
    final String namespace = name.getNamespaceURI();
    if (namespace.length() > 0) {
        final String prefix = namespaceContext.getPrefix(namespace);
        if (prefix.length() > 0) {
            return prefix.concat(":").concat(name.getLocalPart());
        } else {
            return name.getLocalPart();
        }
    } else {
        return name.getLocalPart();
    }
}
 

private static boolean isPrefixDeclared(XMLStreamWriter writer, String nsUri, String prefix) {
    boolean prefixDecl = false;
    NamespaceContext nscontext = writer.getNamespaceContext();
    Iterator prefixItr = nscontext.getPrefixes(nsUri);
    while (prefixItr.hasNext()) {
        if (prefix.equals(prefixItr.next())) {
            prefixDecl = true;
            break;
        }
    }
    return prefixDecl;
}
 

private static final String typeLexicalName(final QName name, final XMLStreamWriter context) {
    final NamespaceContext namespaceContext = context.getNamespaceContext();
    final String namespace = name.getNamespaceURI();
    if (namespace.length() > 0) {
        final String prefix = namespaceContext.getPrefix(namespace);
        if (prefix == null || prefix.length() == 0) {
            return name.getLocalPart();
        } else {
            return prefix.concat(":").concat(name.getLocalPart());
        }
    } else {
        return name.getLocalPart();
    }
}
 

@Override
public void writeValue(final XMLStreamWriter ctx, final QName value) throws XMLStreamException {
    final RandomPrefix prefixes = new RandomPrefix(ctx.getNamespaceContext());
    final String str = QNameCodecUtil.encodeQName(value, uri -> prefixes.encodePrefix(uri.getNamespace()));

    for (Entry<URI, String> e : prefixes.getPrefixes()) {
        ctx.writeNamespace(e.getValue(), e.getKey().toString());
    }
    ctx.writeCharacters(str);
}
 

private static boolean isPrefixDeclared(XMLStreamWriter writer, String nsUri, String prefix) {
    boolean prefixDecl = false;
    NamespaceContext nscontext = writer.getNamespaceContext();
    Iterator prefixItr = nscontext.getPrefixes(nsUri);
    while (prefixItr.hasNext()) {
        if (prefix.equals(prefixItr.next())) {
            prefixDecl = true;
            break;
        }
    }
    return prefixDecl;
}
 

/**
 * sets undeclared prefixes on the writer
 * @param prefix
 * @param writer
 * @throws XMLStreamException
 */
private static void setUndeclaredPrefix(String prefix, String readerURI, XMLStreamWriter writer) throws XMLStreamException {
    String writerURI = null;
    if (writer.getNamespaceContext() != null) {
        writerURI = writer.getNamespaceContext().getNamespaceURI(prefix);
    }

    if (writerURI == null) {
        writer.setPrefix(prefix, readerURI != null ? readerURI : "");
        writer.writeNamespace(prefix, readerURI != null ? readerURI : "");
    }
}
 

private static boolean isPrefixDeclared(XMLStreamWriter writer, String nsUri, String prefix) {
    boolean prefixDecl = false;
    NamespaceContext nscontext = writer.getNamespaceContext();
    Iterator prefixItr = nscontext.getPrefixes(nsUri);
    while (prefixItr.hasNext()) {
        if (prefix.equals(prefixItr.next())) {
            prefixDecl = true;
            break;
        }
    }
    return prefixDecl;
}
 

/**
 * sets undeclared prefixes on the writer
 * @param prefix
 * @param writer
 * @throws XMLStreamException
 */
private static void setUndeclaredPrefix(String prefix, String readerURI, XMLStreamWriter writer) throws XMLStreamException {
    String writerURI = null;
    if (writer.getNamespaceContext() != null) {
        writerURI = writer.getNamespaceContext().getNamespaceURI(prefix);
    }

    if (writerURI == null) {
        writer.setPrefix(prefix, readerURI != null ? readerURI : "");
        writer.writeNamespace(prefix, readerURI != null ? readerURI : "");
    }
}
 

private static boolean isPrefixDeclared(XMLStreamWriter writer, String nsUri, String prefix) {
    boolean prefixDecl = false;
    NamespaceContext nscontext = writer.getNamespaceContext();
    Iterator prefixItr = nscontext.getPrefixes(nsUri);
    while (prefixItr.hasNext()) {
        if (prefix.equals(prefixItr.next())) {
            prefixDecl = true;
            break;
        }
    }
    return prefixDecl;
}
 

StreamWriterFacade(final XMLStreamWriter writer) {
    this.writer = requireNonNull(writer);
    prefixes = new RandomPrefix(writer.getNamespaceContext());
}