net.sf.dynamicreports.jasper.base.reporthandler.JasperPrintListFileHandler Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of dynamicreports-core Show documentation

DynamicReports is an open source Java reporting library based on JasperReports. It allows to create dynamic report designs and it doesn't need a visual report designer. You can very quickly create reports and produce documents that can be displayed, printed or exported into many popular formats such as PDF, Excel, Word and others.

There is a newer version: 6.20.1

Show newest version

/**
 * DynamicReports - Free Java reporting library for creating reports dynamically
 *
 * Copyright (C) 2010 - 2016 Ricardo Mariaca
 * http://www.dynamicreports.org
 *
 * This file is part of DynamicReports.
 *
 * DynamicReports is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * DynamicReports is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with DynamicReports. If not, see .
 */

package net.sf.dynamicreports.jasper.base.reporthandler;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import java.util.ListIterator;

import net.sf.dynamicreports.report.exception.DRReportException;
import net.sf.jasperreports.engine.JRException;
import net.sf.jasperreports.engine.JRVirtualizer;
import net.sf.jasperreports.engine.JasperPrint;
import net.sf.jasperreports.engine.util.JRLoader;
import net.sf.jasperreports.engine.util.JRSaver;

/**
 * @author Ricardo Mariaca ([email protected])
 */
public class JasperPrintListFileHandler extends AbstractPrintListHandler {
	private static final String TEMP_FILE_PREFIX = "JasperPrint";

	private List printList;
	private List tempFiles;
	private File directory;
	private JRVirtualizer virtualizer;

	public JasperPrintListFileHandler(String directory) {
		this(directory, null);
	}

	public JasperPrintListFileHandler(String directory, JRVirtualizer virtualizer) {
		this.virtualizer = virtualizer;
		if (directory != null) {
			this.directory = new File(directory);
		}
		printList = new PrintList();
		tempFiles = new ArrayList();
	}

	@Override
	protected void add(JasperPrint jasperPrint) {
		try {
			File tempFile = File.createTempFile(TEMP_FILE_PREFIX, null, directory);
			JRSaver.saveObject(jasperPrint, tempFile);
			tempFiles.add(tempFile);
		} catch (JRException e) {
			throw new DRReportException(e);
		} catch (IOException e) {
			throw new DRReportException(e);
		}
	}

	@Override
	public List getPrintList() {
		return printList;
	}

	@Override
	protected void finalize() throws Throwable {
		for (File tempFile : tempFiles) {
			tempFile.delete();
		}
		super.finalize();
	}

	private class PrintList implements List {

		@Override
		public int size() {
			return tempFiles.size();
		}

		@Override
		public boolean isEmpty() {
			return tempFiles.isEmpty();
		}

		@Override
		public boolean contains(Object o) {
			throw new UnsupportedOperationException();
		}

		@Override
		public Iterator iterator() {
			return new Iterator() {
				private Iterator it = tempFiles.iterator();

				@Override
				public boolean hasNext() {
					return it.hasNext();
				}

				@Override
				public JasperPrint next() {
					File tempFile = it.next();
					try {
						JasperPrint jasperPrint = JRLoader.loadJasperPrint(tempFile, virtualizer);
						return jasperPrint;
					} catch (JRException e) {
						throw new DRReportException(e);
					}
				}

				@Override
				public void remove() {
					throw new UnsupportedOperationException();
				}

			};
		}

		@Override
		public Object[] toArray() {
			throw new UnsupportedOperationException();
		}

		@Override
		public  T[] toArray(T[] a) {
			throw new UnsupportedOperationException();
		}

		@Override
		public boolean add(JasperPrint o) {
			throw new UnsupportedOperationException();
		}

		@Override
		public boolean remove(Object o) {
			throw new UnsupportedOperationException();
		}

		@Override
		public boolean containsAll(Collection c) {
			throw new UnsupportedOperationException();
		}

		@Override
		public boolean addAll(Collection c) {
			throw new UnsupportedOperationException();
		}

		@Override
		public boolean addAll(int index, Collection c) {
			throw new UnsupportedOperationException();
		}

		@Override
		public boolean removeAll(Collection c) {
			throw new UnsupportedOperationException();
		}

		@Override
		public boolean retainAll(Collection c) {
			throw new UnsupportedOperationException();
		}

		@Override
		public void clear() {
			throw new UnsupportedOperationException();
		}

		@Override
		public JasperPrint get(int index) {
			try {
				File tempFile = tempFiles.get(index);
				JasperPrint jasperPrint = JRLoader.loadJasperPrint(tempFile, virtualizer);
				return jasperPrint;
			} catch (JRException e) {
				throw new DRReportException(e);
			}
		}

		@Override
		public JasperPrint set(int index, JasperPrint element) {
			throw new UnsupportedOperationException();
		}

		@Override
		public void add(int index, JasperPrint element) {
			throw new UnsupportedOperationException();
		}

		@Override
		public JasperPrint remove(int index) {
			throw new UnsupportedOperationException();
		}

		@Override
		public int indexOf(Object o) {
			throw new UnsupportedOperationException();
		}

		@Override
		public int lastIndexOf(Object o) {
			throw new UnsupportedOperationException();
		}

		@Override
		public ListIterator listIterator() {
			throw new UnsupportedOperationException();
		}

		@Override
		public ListIterator listIterator(int index) {
			throw new UnsupportedOperationException();
		}

		@Override
		public List subList(int fromIndex, int toIndex) {
			throw new UnsupportedOperationException();
		}
	}
}