abstracttransletwrapper.java

CRM源码This file describes some issues that should be implemented in future and how it should be imple

/*
 * Copyright 2006-2007 Queplix Corp.
 *
 * Licensed under the Queplix Public License, Version 1.1.1 (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.queplix.com/solutions/commercial-open-source/queplix-public-license/
 *
 * 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 com.queplix.core.utils.xml;

import com.queplix.core.error.GenericSystemException;

import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Templates;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.stream.StreamResult;
import javax.xml.transform.stream.StreamSource;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Iterator;
import java.util.Map;

/**
 * <p>Abstract translet wrapper implementation</p>
 * @author [ALB] Baranov Andrey
 * @version $Revision: 1.1.1.1 $ $Date: 2005/09/12 15:31:25 $
 */

public abstract class AbstractTransletWrapper
    implements TransletWrapper {

    // ----------------------------------------------------- variables

    // Get TransformerFactory.
    protected TransformerFactory factory;

    // ----------------------------------------------------- public methods

    /**
     * Constructor.
     */
    public AbstractTransletWrapper() {
        factory = TransformerFactory.newInstance();
    }

    /*
     * No javadoc
     * @see TransletWrapper#loadTemplate(InputStream)
     */
    public Templates loadTemplate( InputStream xslStream ) {
        try {
            return factory.newTemplates( new StreamSource( xslStream ) );

        } catch( TransformerException ex ) {
            throw new GenericSystemException( "Transformer exception: " + ex.getMessage(), ex );

        } catch( Exception ex ) {
            throw new GenericSystemException( "Unknown exception: " + ex.getMessage(), ex );
        }
    }

    /*
     * No javadoc
     * @see TransletWrapper#transform(File,File,Map)
     */
    public OutputStream transform( File xslFile, File xmlFile, Map params ) {

        try {
            // Get Transformer.
            Transformer t = factory.newTransformer( new StreamSource( xslFile ) );

            // Add XSLT global parameters
            t.clearParameters();
            if( params != null ) {
                Iterator it = params.keySet().iterator();
                while( it.hasNext() ) {
                    String key = ( String ) it.next();
                    Object value = params.get( key );
                    t.setParameter( key, value );
                }
            }

            // Do transform.
            StreamResult result = new StreamResult( new ByteArrayOutputStream() );
            t.transform( new StreamSource( xmlFile ), result );
            return result.getOutputStream();

        } catch( TransformerException ex ) {
            throw new GenericSystemException( "Transformer exception: " + ex.getMessage(), ex );

        } catch( Exception ex ) {
            throw new GenericSystemException( "Unknown exception: " + ex.getMessage(), ex );
        }
    }

    /*
     * No javadoc
     * @see TransletWrapper#transform(Source,Result,Templates,Map)
     */
    public void transform( Source source, Result result, Templates templates, Map params ) {
        try {
            // Get Transformer.
            Transformer t = templates.newTransformer();

            // Add XSLT global parameters
            t.clearParameters();
            if( params != null ) {
                Iterator it = params.keySet().iterator();
                while( it.hasNext() ) {
                    String key = ( String ) it.next();
                    Object value = params.get( key );
                    t.setParameter( key, value );
                }
            }

            // Do transform.
            t.transform( source, result );

        } catch( TransformerException ex ) {
            throw new GenericSystemException( "Transformer exception: " + ex.getMessage(), ex );

        } catch( Exception ex ) {
            throw new GenericSystemException( "Unknown exception: " + ex.getMessage(), ex );
        }
    }

}