ZipDocuments.java

// This file was generated by Mendix Studio Pro.
//
// WARNING: Only the following code will be retained when actions are regenerated:
// - the import list
// - the code between BEGIN USER CODE and END USER CODE
// - the code between BEGIN EXTRA CODE and END EXTRA CODE
// Other code you write will be lost the next time you deploy the project.
// Special characters, e.g., é, ö, à, etc. are supported in comments.

package ziphandling.actions;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
import com.mendix.core.Core;
import com.mendix.systemwideinterfaces.core.IContext;
import com.mendix.webui.CustomJavaAction;
import com.mendix.systemwideinterfaces.core.IMendixObject;

/**
 * This Java action will zip all files given in the list of documets in one zip file output.zip.
 */
public class ZipDocuments extends CustomJavaAction<IMendixObject>
{
	/** @deprecated use com.mendix.utils.ListUtils.map(ListOfDocument, com.mendix.systemwideinterfaces.core.IEntityProxy::getMendixObject) instead. */
	@java.lang.Deprecated(forRemoval = true)
	private final java.util.List<IMendixObject> __ListOfDocument;
	private final java.util.List<system.proxies.FileDocument> ListOfDocument;
	/** @deprecated use ZipFile.getMendixObject() instead. */
	@java.lang.Deprecated(forRemoval = true)
	private final IMendixObject __ZipFile;
	private final system.proxies.FileDocument ZipFile;

	public ZipDocuments(
		IContext context,
		java.util.List<IMendixObject> _listOfDocument,
		IMendixObject _zipFile
	)
	{
		super(context);
		this.__ListOfDocument = _listOfDocument;
		this.ListOfDocument = java.util.Optional.ofNullable(_listOfDocument)
			.orElse(java.util.Collections.emptyList())
			.stream()
			.map(listOfDocumentElement -> system.proxies.FileDocument.initialize(getContext(), listOfDocumentElement))
			.collect(java.util.stream.Collectors.toList());
		this.__ZipFile = _zipFile;
		this.ZipFile = _zipFile == null ? null : system.proxies.FileDocument.initialize(getContext(), _zipFile);
	}

	@java.lang.Override
	public IMendixObject executeAction() throws Exception
	{
		// BEGIN USER CODE
		File tempZipFile = File.createTempFile("zipfile", "temp");
	
		ZipOutputStream zipStream = new ZipOutputStream(new FileOutputStream(tempZipFile));

		List<String> fileList = new ArrayList<String>();
	
		for (system.proxies.FileDocument file : ListOfDocument) {
			String fileName = file.getName();
			// skip files with no names
			if (fileName != null) {
				//skip files with no contents
				if (file.getHasContents()) {
						if (fileList.contains(fileName)) fileName = file.getMendixObject().getId().toLong() + " " + fileName;
						
						InputStream inputStream = Core.getFileDocumentContent(getContext(), file.getMendixObject());
						ZipDocuments.addToZipFile(inputStream,fileName,zipStream);
					
						zipStream.closeEntry();
						fileList.add(fileName);
				}
			}
		}
		zipStream.close();
		
	
	    IMendixObject NewZipFile = Core.instantiate(getContext(), "System.FileDocument");
		NewZipFile.setValue(getContext(), "Name" , "output.zip" );
		NewZipFile.setValue(getContext(), "DeleteAfterDownload" , "true" );

		InputStream zipInputStream = new FileInputStream(tempZipFile);
	
		Core.storeFileDocumentContent(getContext(), NewZipFile, zipInputStream);

		zipInputStream.close();
	
		tempZipFile.delete();
		
	
	    return NewZipFile;	
		// END USER CODE
	}

	/**
	 * Returns a string representation of this action
	 * @return a string representation of this action
	 */
	@java.lang.Override
	public java.lang.String toString()
	{
		return "ZipDocuments";
	}

	// BEGIN EXTRA CODE
	public static void addToZipFile(InputStream fis,String fileName, ZipOutputStream zos) throws FileNotFoundException, IOException {

		
		ZipEntry zipEntry = new ZipEntry(fileName);
		zos.putNextEntry(zipEntry);

		byte[] bytes = new byte[1024];
		int length;
		while ((length = fis.read(bytes)) >= 0) {
			zos.write(bytes, 0, length);
		}

		zos.closeEntry();
		fis.close();
	}

	// END EXTRA CODE
}