net.unit8.longadeseo.plugin.impl.JRubyExcelPlugin.java Source code

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Here is the source code for net.unit8.longadeseo.plugin.impl.JRubyExcelPlugin.java

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/*******************************************************************************
 * Copyright 2011 kawasima
 *
 * 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.unit8.longadeseo.plugin.impl;

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;

import javax.script.Compilable;
import javax.script.CompiledScript;
import javax.script.ScriptEngine;
import javax.script.ScriptEngineManager;
import javax.script.ScriptException;
import javax.script.SimpleBindings;

import net.unit8.axebomber.parser.Book;
import net.unit8.longadeseo.plugin.Plugin;
import net.unit8.longadeseo.plugin.PluginExecutionException;
import net.unit8.longadeseo.plugin.PluginOption;
import net.unit8.longadeseo.plugin.PluginOptionType;

import org.apache.commons.io.IOUtils;
import org.apache.jackrabbit.webdav.DavResource;
import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.usermodel.WorkbookFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

@SuppressWarnings("restriction")
public class JRubyExcelPlugin extends Plugin {
    private static final long serialVersionUID = 3582301799818568571L;

    @SuppressWarnings("unused")
    private static final Logger logger = LoggerFactory.getLogger(JRubyExcelPlugin.class);
    private transient CompiledScript script;

    @PluginOption(label = "??")
    private String scriptFile;

    @PluginOption(label = "", formType = PluginOptionType.TEXTAREA)
    private String scriptText;

    static {
        System.setProperty("org.jruby.embed.localvariable.behavior", "transient");
        System.setProperty("org.jruby.embed.localcontext.scope", "threadsafe");
    }

    public JRubyExcelPlugin() {

    }

    public void init() {
        ScriptEngineManager manager = new ScriptEngineManager();
        ScriptEngine engine = manager.getEngineByName("jruby");
        Reader scriptReader = null;
        try {
            if (scriptText == null || scriptText.length() == 0) {
                scriptReader = new InputStreamReader(getClass().getClassLoader().getResourceAsStream(scriptFile));
                script = ((Compilable) engine).compile(scriptReader);
            } else {
                script = ((Compilable) engine).compile(scriptText);
            }
        } catch (ScriptException e) {
            throw new PluginExecutionException(e);
        } finally {
            IOUtils.closeQuietly(scriptReader);
        }
    }

    @Override
    public void beforeService(DavResource resource) {
    }

    @Override
    public void afterService(DavResource resource, InputStream in) {
        try {
            Workbook workbook = load(in);
            Book book = new Book(workbook);
            SimpleBindings bindings = new SimpleBindings();
            bindings.put("@book", book);
            script.eval(bindings);
        } catch (Exception e) {
            throw new PluginExecutionException(e);
        }
    }

    private Workbook load(InputStream in) throws InvalidFormatException, IOException {
        Workbook workbook = WorkbookFactory.create(in);
        return workbook;
    }

}