nz.co.senanque.madura.spring.XSLSpringFactoryBean.java Source code

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/*******************************************************************************
 * Copyright (c)2013 Prometheus Consulting
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *******************************************************************************/
package nz.co.senanque.madura.spring;

import java.io.InputStream;

import javax.xml.transform.Source;
import javax.xml.transform.Templates;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.stream.StreamSource;

import org.springframework.beans.factory.FactoryBean;
import org.springframework.core.io.Resource;

/**
 * Creates an XSL template from the wired source.
 * 
 * @author Roger Parkinson
 * @version $Revision: 1.5 $
 */
public class XSLSpringFactoryBean implements FactoryBean<Templates> {
    private Resource m_resource;
    private String m_path;

    public Templates getObject() throws Exception {
        return loadXSLT(getResource().getInputStream());
    }

    public Class<Templates> getObjectType() {
        return Templates.class;
    }

    public boolean isSingleton() {
        return true;
    }

    /**
     * Load the XSLT document. The documentName can be a local resource file name
     * or a url pointing to a resource.
     * @param documentName
     * @return a Templates object containing the document
     * @throws DocumentException
     */
    private Templates loadXSLT(InputStream in) {
        try {
            Source xsltSource = new StreamSource(in);
            TransformerFactory transFact = TransformerFactory.newInstance();
            Templates templates = transFact.newTemplates(xsltSource);
            return templates;
        } catch (Exception e) {
            throw new RuntimeException("failed to parse: " + getResource().getDescription(), e);
        }
    }

    public String getPath() {
        return m_path;
    }

    public void setPath(String path) {
        m_path = path;
    }

    public Resource getResource() {
        return m_resource;
    }

    public void setResource(Resource resource) {
        m_resource = resource;
    }

}