trireme-xslt/xslt.js

An XSLT module optimized for the Trireme project

/*
 * Copyright 2014 Apigee Corporation.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
 
var xslt = require('node_xslt');

'use strict';
 
function setTransformer(transformerClass) {
  // Does nothing in the non-Java implementation
}
 
function compileStylesheet(s) {
  var stylesheet = convertInput(s);
  return xslt.readXsltString(stylesheet);
}
 
function transform(stylesheet, d, parameters, callback) {
  if (!stylesheet) {
    throw new Error('stylesheet must be set');
  }
  if (typeof parameters === 'function') {
    callback = parameters;
    parameters = undefined;
  }
  if (parameters && (typeof parameters !== 'object')) {
    throw new Error('parameters must be an object');
  }
  if (callback && (typeof callback !== 'function')) {
    throw new Error('callback must be a function');
  }
  var document = convertInput(d, 'document');
  
  var parray = [];
  for (var k in parameters) {
    parray.push(k);
    parray.push(parameters[k]);
  }
  
  try {
    var parsedDoc = xslt.readXmlString(document);
    
    var result = xslt.transform(stylesheet, parsedDoc, parray);
    if (callback) {
      callback(undefined, result);
    } else {
      return result;
    }
  } catch (e) {
    if (callback) {
      callback(e);
    } else {
      throw e;
    }
  }
}
 
function convertInput(inp, name) {
  if (typeof inp === 'string') {
    return inp;
  }
  if (inp instanceof Buffer) {
    return inp.toString('utf8');
  }
  throw new Error(name + ' must be a string or a Buffer');
}
 
module.exports.setTransformer = setTransformer;
module.exports.compileStylesheet = compileStylesheet;
module.exports.transform = transform;