kxmlserializer.java

KXML一个基于j2me的xml解析器

            String[] hlp = new String[nspStack.length + 16];
            System.arraycopy(nspStack, 0, hlp, 0, pos);
            nspStack = hlp;
        }

        nspStack[pos++] = prefix;
        nspStack[pos] = namespace;
    }

    public void setOutput(Writer writer) {
        this.writer = writer;

        // elementStack = new String[12]; //nsp/prefix/name
        //nspCounts = new int[4];
        //nspStack = new String[8]; //prefix/nsp
        //indent = new boolean[4];

        nspCounts[0] = 2;
        nspCounts[1] = 2;
        nspStack[0] = "";
        nspStack[1] = "";
        nspStack[2] = "xml";
        nspStack[3] = "http://www.w3.org/XML/1998/namespace";
        pending = false;
        auto = 0;
        depth = 0;

        unicode = false;
    }

    public void setOutput(OutputStream os, String encoding)
        throws IOException {
        if (os == null)
            throw new IllegalArgumentException();
        setOutput(
            encoding == null
                ? new OutputStreamWriter(os)
                : new OutputStreamWriter(os, encoding));
        this.encoding = encoding;
        if (encoding != null
            && encoding.toLowerCase().startsWith("utf"))
            unicode = true;
    }

    public void startDocument(
        String encoding,
        Boolean standalone)
        throws IOException {
        writer.write("<?xml version='1.0' ");

        if (encoding != null) {
            this.encoding = encoding;
            if (encoding.toLowerCase().startsWith("utf"))
                unicode = true;
        }

        if (this.encoding != null) {
            writer.write("encoding='");
            writer.write(this.encoding);
            writer.write("' ");
        }

        if (standalone != null) {
            writer.write("standalone='");
            writer.write(
                standalone.booleanValue() ? "yes" : "no");
            writer.write("' ");
        }
        writer.write("?>");
    }

    public XmlSerializer startTag(String namespace, String name)
        throws IOException {
        check(false);

        //        if (namespace == null)
        //            namespace = "";

        if (indent[depth]) {
            writer.write("\r\n");
            for (int i = 0; i < depth; i++)
                writer.write("  ");
        }

        int esp = depth * 3;

        if (elementStack.length < esp + 3) {
            String[] hlp = new String[elementStack.length + 12];
            System.arraycopy(elementStack, 0, hlp, 0, esp);
            elementStack = hlp;
        }

        String prefix =
            namespace == null
                ? ""
                : getPrefix(namespace, true, true);

        if ("".equals(namespace)) {
            for (int i = nspCounts[depth];
                i < nspCounts[depth + 1];
                i++) {
                if ("".equals(nspStack[i * 2]) && !"".equals(nspStack[i * 2 + 1])) {
                    throw new IllegalStateException("Cannot set default namespace for elements in no namespace");
                }
            }
        }

        elementStack[esp++] = namespace;
        elementStack[esp++] = prefix;
        elementStack[esp] = name;

        writer.write('<');
        if (!"".equals(prefix)) {
            writer.write(prefix);
            writer.write(':');
        }

        writer.write(name);

        pending = true;

        return this;
    }

    public XmlSerializer attribute(
        String namespace,
        String name,
        String value)
        throws IOException {
        if (!pending)
            throw new IllegalStateException("illegal position for attribute");

        //        int cnt = nspCounts[depth];

        if (namespace == null)
            namespace = "";

        //		depth--;
        //		pending = false;

        String prefix =
            "".equals(namespace)
                ? ""
                : getPrefix(namespace, false, true);

        //		pending = true;
        //		depth++;

        /*        if (cnt != nspCounts[depth]) {
                    writer.write(' ');
                    writer.write("xmlns");
                    if (nspStack[cnt * 2] != null) {
                        writer.write(':');
                        writer.write(nspStack[cnt * 2]);
                    }
                    writer.write("=\"");
                    writeEscaped(nspStack[cnt * 2 + 1], '"');
                    writer.write('"');
                }
                */

        writer.write(' ');
        if (!"".equals(prefix)) {
            writer.write(prefix);
            writer.write(':');
        }
        writer.write(name);
        writer.write('=');
        char q = value.indexOf('"') == -1 ? '"' : '\'';
        writer.write(q);
        writeEscaped(value, q);
        writer.write(q);

        return this;
    }

    public void flush() throws IOException {
        check(false);
        writer.flush();
    }
    /*
    	public void close() throws IOException {
    		check();
    		writer.close();
    	}
    */
    public XmlSerializer endTag(String namespace, String name)
        throws IOException {

        if (!pending)
            depth--;
        //        if (namespace == null)
        //          namespace = "";

        if ((namespace == null
            && elementStack[depth * 3] != null)
            || (namespace != null
                && !namespace.equals(elementStack[depth * 3]))
            || !elementStack[depth * 3 + 2].equals(name))
            throw new IllegalArgumentException("</{"+namespace+"}"+name+"> does not match start");

        if (pending) {
            check(true);
            depth--;
        }
        else {
            if (indent[depth + 1]) {
                writer.write("\r\n");
                for (int i = 0; i < depth; i++)
                    writer.write("  ");
            }

            writer.write("</");
            String prefix = elementStack[depth * 3 + 1];
            if (!"".equals(prefix)) {
                writer.write(prefix);
                writer.write(':');
            }
            writer.write(name);
            writer.write('>');
        }

        nspCounts[depth + 1] = nspCounts[depth];
        return this;
    }

    public String getNamespace() {
        return getDepth() == 0 ? null : elementStack[getDepth() * 3 - 3];
    }

    public String getName() {
        return getDepth() == 0 ? null : elementStack[getDepth() * 3 - 1];
    }

    public int getDepth() {
        return pending ? depth + 1 : depth;
    }

    public XmlSerializer text(String text) throws IOException {
        check(false);
        indent[depth] = false;
        writeEscaped(text, -1);
        return this;
    }

    public XmlSerializer text(char[] text, int start, int len)
        throws IOException {
        text(new String(text, start, len));
        return this;
    }

    public void cdsect(String data) throws IOException {
        check(false);
        writer.write("<![CDATA[");
        writer.write(data);
        writer.write("]]>");
    }

    public void comment(String comment) throws IOException {
        check(false);
        writer.write("<!--");
        writer.write(comment);
        writer.write("-->");
    }

    public void processingInstruction(String pi)
        throws IOException {
        check(false);
        writer.write("<?");
        writer.write(pi);
        writer.write("?>");
    }
}