org.ojbc.util.camel.processor.accesscontrol.XacmlRequestTransformer.java Source code

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Here is the source code for org.ojbc.util.camel.processor.accesscontrol.XacmlRequestTransformer.java

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/*
 * Unless explicitly acquired and licensed from Licensor under another license, the contents of
 * this file are subject to the Reciprocal Public License ("RPL") Version 1.5, or subsequent
 * versions as allowed by the RPL, and You may not copy or use this file in either source code
 * or executable form, except in compliance with the terms and conditions of the RPL
 *
 * All software distributed under the RPL is provided strictly on an "AS IS" basis, WITHOUT
 * WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, AND LICENSOR HEREBY DISCLAIMS ALL SUCH
 * WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
 * PARTICULAR PURPOSE, QUIET ENJOYMENT, OR NON-INFRINGEMENT. See the RPL for specific language
 * governing rights and limitations under the RPL.
 *
 * http://opensource.org/licenses/RPL-1.5
 *
 * Copyright 2012-2015 Open Justice Broker Consortium
 */
package org.ojbc.util.camel.processor.accesscontrol;

import java.io.ByteArrayInputStream;

import javax.xml.transform.sax.SAXSource;

import org.apache.commons.codec.CharEncoding;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.ojbc.util.camel.helper.OJBUtils;
import org.ojbc.util.xml.XsltTransformer;
import org.w3c.dom.Document;
import org.xml.sax.InputSource;

public class XacmlRequestTransformer {

    private XsltTransformer xsltTransformer;

    private static final Log log = LogFactory.getLog(XacmlRequestTransformer.class);

    public XacmlRequestTransformer() {

        xsltTransformer = new XsltTransformer();
    }

    public Document getTransformedXacmlQueryRequest(String requestXmlContent, String xslStringContent,
            String xslUrlExtFormForSystemId) throws Exception {

        return convertXmlRequestToXacmlRequest(requestXmlContent, xslStringContent, xslUrlExtFormForSystemId);
    }

    private Document convertXmlRequestToXacmlRequest(String pXmlRequestContentString, String xslContent,
            String xslUrlExtFormForSystemId) throws Exception {

        SAXSource requestXmlSaxInputSource = getSaxSourceForXmlRequestContent(pXmlRequestContentString);

        SAXSource xslSaxSource = getSaxSourceForXsl(xslContent, xslUrlExtFormForSystemId);

        String xacmlRequestString = xsltTransformer.transform(requestXmlSaxInputSource, xslSaxSource, null);

        Document xacmlRequestDoc = OJBUtils.loadXMLFromString(xacmlRequestString);

        return xacmlRequestDoc;
    }

    private SAXSource getSaxSourceForXmlRequestContent(String requestContent) {

        ByteArrayInputStream requestByteInStream = new ByteArrayInputStream(requestContent.getBytes());
        InputSource requestInputSource = new InputSource(requestByteInStream);
        requestInputSource.setEncoding(CharEncoding.UTF_8);
        SAXSource requestXmlSaxInputSource = new SAXSource(requestInputSource);

        log.info("Got saxSource cor xml request string");

        return requestXmlSaxInputSource;
    }

    private SAXSource getSaxSourceForXsl(String xslFileStringContent, String xslUrlExtFormForSystemId) {

        try {

            InputSource inputSource = new InputSource(xslFileStringContent);
            inputSource.setEncoding(CharEncoding.UTF_8);

            SAXSource saxInputSource = new SAXSource(inputSource);

            //need to setSystemId because xsl needs this set in order for to <import> to know where to look to load relative paths
            saxInputSource.setSystemId(xslUrlExtFormForSystemId);

            return saxInputSource;

        } catch (Exception e) {
            throw new RuntimeException("Unable to read XSL: " + xslFileStringContent, e);
        }
    }

}