xml2json.xslt

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<!--
  Copyright (c) 2006,2008 Doeke Zanstra
  All rights reserved.

  Redistribution and use in source and binary forms, with or without modification,
  are permitted provided that the following conditions are met:

  Redistributions of source code must retain the above copyright notice, this
  list of conditions and the following disclaimer. Redistributions in binary
  form must reproduce the above copyright notice, this list of conditions and the
  following disclaimer in the documentation and/or other materials provided with
  the distribution.

  Neither the name of the dzLib nor the names of its contributors may be used to
  endorse or promote products derived from this software without specific prior
  written permission.

  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
  INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  THE POSSIBILITY OF SUCH DAMAGE.
-->

  <xsl:output indent="no" omit-xml-declaration="yes" method="text" encoding="UTF-8" media-type="text/x-json"/>
	<xsl:strip-space elements="*"/>
  <!--contant-->
  <xsl:variable name="d">0123456789</xsl:variable>

  <!-- ignore document text -->
  <xsl:template match="text()[preceding-sibling::node() or following-sibling::node()]"/>

  <!-- string -->
  <xsl:template match="text()">
    <xsl:call-template name="escape-string">
      <xsl:with-param name="s" select="."/>
    </xsl:call-template>
  </xsl:template>

  <!-- Main template for escaping strings; used by above template and for object-properties
       Responsibilities: placed quotes around string, and chain up to next filter, escape-bs-string -->
  <xsl:template name="escape-string">
    <xsl:param name="s"/>
    <xsl:text>"</xsl:text>
    <xsl:call-template name="escape-bs-string">
      <xsl:with-param name="s" select="$s"/>
    </xsl:call-template>
    <xsl:text>"</xsl:text>
  </xsl:template>

  <!-- Escape the backslash (\) before everything else. -->
  <xsl:template name="escape-bs-string">
    <xsl:param name="s"/>
    <xsl:choose>
      <xsl:when test="contains($s,'\')">
        <xsl:call-template name="escape-quot-string">
          <xsl:with-param name="s" select="concat(substring-before($s,'\'),'\\')"/>
        </xsl:call-template>
        <xsl:call-template name="escape-bs-string">
          <xsl:with-param name="s" select="substring-after($s,'\')"/>
        </xsl:call-template>
      </xsl:when>
      <xsl:otherwise>
        <xsl:call-template name="escape-quot-string">
          <xsl:with-param name="s" select="$s"/>
        </xsl:call-template>
      </xsl:otherwise>
    </xsl:choose>
  </xsl:template>

  <!-- Escape the double quote ("). -->
  <xsl:template name="escape-quot-string">
    <xsl:param name="s"/>
    <xsl:choose>
      <xsl:when test="contains($s,'&quot;')">
        <xsl:call-template name="encode-string">
          <xsl:with-param name="s" select="concat(substring-before($s,'&quot;'),'\&quot;')"/>
        </xsl:call-template>
        <xsl:call-template name="escape-quot-string">
          <xsl:with-param name="s" select="substring-after($s,'&quot;')"/>
        </xsl:call-template>
      </xsl:when>
      <xsl:otherwise>
        <xsl:call-template name="encode-string">
          <xsl:with-param name="s" select="$s"/>
        </xsl:call-template>
      </xsl:otherwise>
    </xsl:choose>
  </xsl:template>

  <!-- Replace tab, line feed and/or carriage return by its matching escape code. Can't escape backslash
       or double quote here, because they don't replace characters (&#x0; becomes \t), but they prefix
       characters (\ becomes \\). Besides, backslash should be seperate anyway, because it should be
       processed first. This function can't do that. -->
  <xsl:template name="encode-string">
    <xsl:param name="s"/>
    <xsl:choose>
      <!-- tab -->
      <xsl:when test="contains($s,'&#x9;')">
        <xsl:call-template name="encode-string">
          <xsl:with-param name="s" select="concat(substring-before($s,'&#x9;'),'\t',substring-after($s,'&#x9;'))"/>
        </xsl:call-template>
      </xsl:when>
      <!-- line feed -->
      <xsl:when test="contains($s,'&#xA;')">
        <xsl:call-template name="encode-string">
          <xsl:with-param name="s" select="concat(substring-before($s,'&#xA;'),'\n',substring-after($s,'&#xA;'))"/>
        </xsl:call-template>
      </xsl:when>
      <!-- carriage return -->
      <xsl:when test="contains($s,'&#xD;')">
        <xsl:call-template name="encode-string">
          <xsl:with-param name="s" select="concat(substring-before($s,'&#xD;'),'\r',substring-after($s,'&#xD;'))"/>
        </xsl:call-template>
      </xsl:when>
      <xsl:otherwise><xsl:value-of select="$s"/></xsl:otherwise>
    </xsl:choose>
  </xsl:template>

  <!-- number (no support for javascript mantise) -->
  <xsl:template match="text()[not(string(number())='NaN' or (starts-with(.,'0' ) and . != '0'))]">
    <xsl:value-of select="."/>
  </xsl:template>

  <!-- boolean, case-insensitive -->
  <xsl:template match="text()[translate(.,'TRUE','true')='true']">true</xsl:template>
  <xsl:template match="text()[translate(.,'FALSE','false')='false']">false</xsl:template>

  <!-- objects and arrays -->
  <xsl:template match="*" name="base">
    <xsl:choose>
      <!-- manually specified array -->
      <xsl:when test="(../@type = 'array')"> 
        <xsl:variable name="el" select="name()"/>
        <xsl:text>[</xsl:text>
        <xsl:for-each select="../*[name()=$el]">
          <xsl:if test="position()!=1">,</xsl:if>
          <xsl:choose>
            <xsl:when test="not(child::node())">
              <xsl:text>null</xsl:text>
            </xsl:when>
            <xsl:otherwise>
              <xsl:apply-templates select="child::node()"/>
            </xsl:otherwise>
          </xsl:choose>
        </xsl:for-each>
        <xsl:text>]</xsl:text>
        <xsl:if test="following-sibling::*">,</xsl:if>
      </xsl:when>

      <!-- complete array -->
      <xsl:when test="(count(../*[name(current())=name()])=count(../*)) and count(../*[name(current())=name()])&gt;1">
        <xsl:variable name="el" select="name()"/>
        <xsl:if test="not(following-sibling::*[name()=$el])">
          <xsl:text>[</xsl:text>
          <xsl:for-each select="../*[name()=$el]">
            <xsl:if test="position()!=1">,</xsl:if>
            <xsl:choose>
              <xsl:when test="not(child::node())">
                <xsl:text>null</xsl:text>
              </xsl:when>
              <xsl:otherwise>
                <xsl:apply-templates select="child::node()"/>
              </xsl:otherwise>
            </xsl:choose>
          </xsl:for-each>
          <xsl:text>]</xsl:text>
        </xsl:if>
      </xsl:when>

      <!-- partial array -->
      <xsl:when test="count(../*[name(current())=name()])&gt;1">
	<xsl:if test="not(preceding-sibling::*)">{</xsl:if>
        <xsl:variable name="el" select="name()"/>
        <xsl:if test="not(following-sibling::*[name()=$el])">
          <xsl:call-template name="escape-string">
            <xsl:with-param name="s" select="$el"/>
          </xsl:call-template>
          <xsl:text>:[</xsl:text>
          <xsl:for-each select="../*[name()=$el]">
            <xsl:if test="position()!=1">,</xsl:if>
            <xsl:choose>
              <xsl:when test="not(child::node())">
                <xsl:text>null</xsl:text>
              </xsl:when>
              <xsl:otherwise>
                <xsl:apply-templates select="child::node()"/>
              </xsl:otherwise>
            </xsl:choose>
          </xsl:for-each>
          <xsl:text>]</xsl:text>
          <xsl:if test="following-sibling::*">,</xsl:if>
        </xsl:if>
	<xsl:if test="not(following-sibling::*)">}</xsl:if>
      </xsl:when>

      <!-- object -->
      <xsl:otherwise>
	<xsl:if test="not(preceding-sibling::*)">{</xsl:if>
        <xsl:call-template name="escape-string">
          <xsl:with-param name="s" select="name()"/>
        </xsl:call-template>
        <xsl:text>:</xsl:text>
        <!-- check type of node -->
        <xsl:choose>
    	    <!-- null nodes -->
    	    <xsl:when test="count(child::node())=0">null</xsl:when>
    	    <!-- other nodes -->
    	    <xsl:otherwise>
    	    	<xsl:apply-templates select="child::node()"/>
    	    </xsl:otherwise>
    	  </xsl:choose>
    	  <!-- end of type check -->
    	  <xsl:if test="following-sibling::*">,</xsl:if>
	<xsl:if test="not(following-sibling::*)">}</xsl:if>
      </xsl:otherwise>
    </xsl:choose>
  </xsl:template>

  <!-- convert root element to an anonymous container -->
  <xsl:template match="/">
    <xsl:apply-templates select="node()"/>
  </xsl:template>

</xsl:stylesheet>