net.jcreate.e3.templateEngine.jxp.JxpTemplateEngine.java Source code

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Here is the source code for net.jcreate.e3.templateEngine.jxp.JxpTemplateEngine.java

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/*
 * Copyright 2002-2005 the original author or authors.
 *
 * 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 net.jcreate.e3.templateEngine.jxp;

import java.io.IOException;
import java.io.StringWriter;
import java.io.UnsupportedEncodingException;
import java.io.Writer;
import java.util.Map;

import net.jcreate.e3.templateEngine.Context;
import net.jcreate.e3.templateEngine.MergeTemplateException;
import net.jcreate.e3.templateEngine.Template;
import net.jcreate.e3.templateEngine.support.DefaultContext;
import net.jcreate.e3.templateEngine.support.DefaultTemplate;
import net.jcreate.e3.templateEngine.support.TemplateEngineSupport;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.onemind.jxp.ByteArrayPageSource;
import org.onemind.jxp.JxpContext;
import org.onemind.jxp.JxpProcessor;
import org.onemind.jxp.MultiSourcePageSource;
import org.onemind.jxp.ResourceStreamPageSource;

/**
 * @todo: ??FilePageSource
 * @author new
 *
 */
public class JxpTemplateEngine extends TemplateEngineSupport {
    private final Log log = LogFactory.getLog(this.getClass());

    public JxpTemplateEngine() {
    }

    public void mergeFileTemplate(Template pTemplate, Context pContext, Writer pWriter)
            throws MergeTemplateException {
        String encoding = pTemplate.getInputEncoding();
        MultiSourcePageSource multiSource = new MultiSourcePageSource();
        ResourceStreamPageSource classPathSource = new ResourceStreamPageSource("");

        //       FilePageSource pageSource = new FilePageSource("./templates", encoding);
        //      multiSource.addPageSource(pageSource);
        multiSource.addPageSource(classPathSource);
        JxpContext context = new JxpContext(multiSource);
        JxpProcessor processor = new JxpProcessor(context);

        String path = pTemplate.getResource();
        if (log.isDebugEnabled()) {
            log.debug("?: \"" + path + "\"  Jxp ?.");
            log.debug("?: \"" + path + "\" ??" + pTemplate.getInputEncoding());
        }
        if (pContext == null) {
            pContext = new DefaultContext();
        }

        Map params = pContext.getParameters();
        try {
            processor.process(path, pWriter, params);
        } catch (Exception e) {
            final String MSG = "?? \"" + path + "\"  !" + e.getMessage();
            if (log.isErrorEnabled()) {
                log.error(MSG, e);
            }
            throw new MergeTemplateException(MSG, e);
        }

        try {
            pWriter.flush();
        } catch (IOException e) {
            final String MSG = "?? \"" + path + "\"  !" + e.getMessage();
            if (log.isErrorEnabled()) {
                log.error(MSG, e);
            }
            throw new MergeTemplateException(MSG, e);
        }

    }

    private final String STR_PATH_ID = "JxpTemplateEngine_fcg_path_id_huangyh_not_should_exist_same";

    protected void mergeStringTemplate(Template pTemplate, Context pContext, Writer pWriter)
            throws MergeTemplateException {
        String encoding = pTemplate.getInputEncoding();
        ByteArrayPageSource byteArrayPageSource = new ByteArrayPageSource();
        JxpContext context = new JxpContext(byteArrayPageSource);
        JxpProcessor processor = new JxpProcessor(context);

        String templateStr = this.getStrTemplate(pTemplate);
        try {
            byteArrayPageSource.putPageBuffer(STR_PATH_ID, templateStr.getBytes(encoding));
        } catch (UnsupportedEncodingException e) {
            final String MSG = "?? \"" + templateStr + "\"  !" + e.getMessage();
            if (log.isErrorEnabled()) {
                log.error(MSG, e);
            }
            throw new MergeTemplateException(MSG, e);
        }
        if (pContext == null) {
            pContext = new DefaultContext();
        }
        Map params = pContext.getParameters();
        try {
            processor.process(STR_PATH_ID, pWriter, params);
        } catch (Exception e) {
            final String MSG = "?? \"" + templateStr + "\"  !" + e.getMessage();
            if (log.isErrorEnabled()) {
                log.error(MSG, e);
            }
            throw new MergeTemplateException(MSG, e);
        }

        try {
            pWriter.flush();
        } catch (IOException e) {
            final String MSG = "?? \"" + templateStr + "\"  !" + e.getMessage();
            if (log.isErrorEnabled()) {
                log.error(MSG, e);
            }
            throw new MergeTemplateException(MSG, e);
        }

    }

    public static void main(String[] args) {
        JxpTemplateEngine a = new JxpTemplateEngine();
        Template t = new DefaultTemplate();
        t.setResource("test.jxp");
        Context c = new DefaultContext();
        c.put("msg", "hello");
        c.put("msg2", ".");
        StringWriter writer = new StringWriter();
        a.mergeFileTemplate(t, c, writer);
        System.out.println(writer.toString());
    }
}