toxmlstream.java

来自「Mobile 应用程序使用 Java Micro Edition (Java M」· Java 代码 · 共 627 行 · 第 1/2 页

                    writer.write(m_lineSep, 0, m_lineSepLen);

                m_startNewLine = true;
            }
            catch(IOException e)
            {
                throw new SAXException(e);
            }
        }
        
        if (m_tracer != null)
            super.fireEscapingEvent(target, data);  
    }

    /**
     * Receive notivication of a entityReference.
     *
     * @param name The name of the entity.
     *
     * @throws org.xml.sax.SAXException
     */
    public void entityReference(String name) throws org.xml.sax.SAXException
    {
        if (m_elemContext.m_startTagOpen)
        {
            closeStartTag();
            m_elemContext.m_startTagOpen = false;
        }

        try
        {
            if (shouldIndent())
                indent();

            final java.io.Writer writer = m_writer;
            writer.write('&');
            writer.write(name);
            writer.write(';');
        }
        catch(IOException e)
        {
            throw new SAXException(e);
        }
        
        if (m_tracer != null)
            super.fireEntityReference(name);            
    }

    /**
     * This method is used to add an attribute to the currently open element. 
     * The caller has guaranted that this attribute is unique, which means that it
     * not been seen before and will not be seen again.
     * 
     * @param name the qualified name of the attribute
     * @param value the value of the attribute which can contain only
     * ASCII printable characters characters in the range 32 to 127 inclusive.
     * @param flags the bit values of this integer give optimization information.
     */
    public void addUniqueAttribute(String name, String value, int flags)
        throws SAXException
    {
        if (m_elemContext.m_startTagOpen)
        {
           
            try
            {
                final String patchedName = patchName(name);
                final java.io.Writer writer = m_writer;
                if ((flags & NO_BAD_CHARS) > 0 && m_xmlcharInfo.onlyQuotAmpLtGt)
                {
                    // "flags" has indicated that the characters
                    // '>'  '<'   '&'  and '"' are not in the value and
                    // m_htmlcharInfo has recorded that there are no other
                    // entities in the range 32 to 127 so we write out the
                    // value directly
                    
                    writer.write(' ');
                    writer.write(patchedName);
                    writer.write("=\"");
                    writer.write(value);
                    writer.write('"');
                }
                else
                {
                    writer.write(' ');
                    writer.write(patchedName);
                    writer.write("=\"");
                    writeAttrString(writer, value, this.getEncoding());
                    writer.write('"');
                }
            } catch (IOException e) {
                throw new SAXException(e);
            }
        }
    }

    /**
     * Add an attribute to the current element.
     * @param uri the URI associated with the element name
     * @param localName local part of the attribute name
     * @param rawName   prefix:localName
     * @param type
     * @param value the value of the attribute
     * @param xslAttribute true if this attribute is from an xsl:attribute,
     * false if declared within the elements opening tag.
     * @throws SAXException
     */
    public void addAttribute(
        String uri,
        String localName,
        String rawName,
        String type,
        String value,
        boolean xslAttribute)
        throws SAXException
    {
        if (m_elemContext.m_startTagOpen)
        {
            boolean was_added = addAttributeAlways(uri, localName, rawName, type, value, xslAttribute);
            

            /*
             * We don't run this block of code if:
             * 1. The attribute value was only replaced (was_added is false).
             * 2. The attribute is from an xsl:attribute element (that is handled
             *    in the addAttributeAlways() call just above.
             * 3. The name starts with "xmlns", i.e. it is a namespace declaration.
             */
            if (was_added && !xslAttribute && !rawName.startsWith("xmlns"))
            {
                String prefixUsed =
                    ensureAttributesNamespaceIsDeclared(
                        uri,
                        localName,
                        rawName);
                if (prefixUsed != null
                    && rawName != null
                    && !rawName.startsWith(prefixUsed))
                {
                    // use a different raw name, with the prefix used in the
                    // generated namespace declaration
                    rawName = prefixUsed + ":" + localName;

                }
            }
            addAttributeAlways(uri, localName, rawName, type, value, xslAttribute);
        }
        else
        {
            /*
             * The startTag is closed, yet we are adding an attribute?
             *
             * Section: 7.1.3 Creating Attributes Adding an attribute to an
             * element after a PI (for example) has been added to it is an
             * error. The attributes can be ignored. The spec doesn't explicitly
             * say this is disallowed, as it does for child elements, but it
             * makes sense to have the same treatment.
             *
             * We choose to ignore the attribute which is added too late.
             */
            // Generate a warning of the ignored attributes

            // Create the warning message
            String msg = Utils.messages.createMessage(
                    MsgKey.ER_ILLEGAL_ATTRIBUTE_POSITION,new Object[]{ localName });

            try {
                // Prepare to issue the warning message
                Transformer tran = super.getTransformer();
                ErrorListener errHandler = tran.getErrorListener();


                // Issue the warning message
                if (null != errHandler && m_sourceLocator != null)
                  errHandler.warning(new TransformerException(msg, m_sourceLocator));
                else
                  System.out.println(msg);
                }
            catch (Exception e){}             
        }
    }

    /**
     * @see ExtendedContentHandler#endElement(String)
     */
    public void endElement(String elemName) throws SAXException
    {
        endElement(null, null, elemName);
    }

    /**
     * This method is used to notify the serializer of a namespace mapping (or node)
     * that applies to the current element whose startElement() call has already been seen.
     * The official SAX startPrefixMapping(prefix,uri) is to define a mapping for a child
     * element that is soon to be seen with a startElement() call. The official SAX call 
     * does not apply to the current element, hence the reason for this method.
     */
    public void namespaceAfterStartElement(
        final String prefix,
        final String uri)
        throws SAXException
    {

        // hack for XSLTC with finding URI for default namespace
        if (m_elemContext.m_elementURI == null)
        {
            String prefix1 = getPrefixPart(m_elemContext.m_elementName);
            if (prefix1 == null && EMPTYSTRING.equals(prefix))
            {
                // the elements URI is not known yet, and it
                // doesn't have a prefix, and we are currently
                // setting the uri for prefix "", so we have
                // the uri for the element... lets remember it
                m_elemContext.m_elementURI = uri;
            }
        }            
        startPrefixMapping(prefix,uri,false);
        return;

    }

    /**
     * From XSLTC
     * Declare a prefix to point to a namespace URI. Inform SAX handler
     * if this is a new prefix mapping.
     */
    protected boolean pushNamespace(String prefix, String uri)
    {
        try
        {
            if (m_prefixMap.pushNamespace(
                prefix, uri, m_elemContext.m_currentElemDepth))
            {
                startPrefixMapping(prefix, uri);
                return true;
            }
        }
        catch (SAXException e)
        {
            // falls through
        }
        return false;
    }
    /**
     * Try's to reset the super class and reset this class for 
     * re-use, so that you don't need to create a new serializer 
     * (mostly for performance reasons).
     * 
     * @return true if the class was successfuly reset.
     */
    public boolean reset()
    {
        boolean wasReset = false;
        if (super.reset())
        {
            resetToXMLStream();
            wasReset = true;
        }
        return wasReset;
    }
    
    /**
     * Reset all of the fields owned by ToStream class
     *
     */
    private void resetToXMLStream()
    {
        this.m_cdataTagOpen = false;

    }  

    /**
     * This method checks for the XML version of output document.
     * If XML version of output document is not specified, then output 
     * document is of version XML 1.0.
     * If XML version of output doucment is specified, but it is not either 
     * XML 1.0 or XML 1.1, a warning message is generated, the XML Version of
     * output document is set to XML 1.0 and processing continues.
     * @return string (XML version)
     */
    private String getXMLVersion()
    {
        String xmlVersion = getVersion();
        if(xmlVersion == null || xmlVersion.equals(XMLVERSION10))
        {
            xmlVersion = XMLVERSION10;
        }
        else if(xmlVersion.equals(XMLVERSION11))
        {
            xmlVersion = XMLVERSION11;
        }
        else
        {
            String msg = Utils.messages.createMessage(
                               MsgKey.ER_XML_VERSION_NOT_SUPPORTED,new Object[]{ xmlVersion });
            try 
            {
                // Prepare to issue the warning message
                Transformer tran = super.getTransformer();
                ErrorListener errHandler = tran.getErrorListener();
                // Issue the warning message
                if (null != errHandler && m_sourceLocator != null)
                    errHandler.warning(new TransformerException(msg, m_sourceLocator));
                else
                    System.out.println(msg);
            }
            catch (Exception e){}
            xmlVersion = XMLVERSION10;								
        }
        return xmlVersion;
    }
}