com.foc.vaadin.FPrint.java Source code

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Here is the source code for com.foc.vaadin.FPrint.java

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/*******************************************************************************
 * Copyright 2016 Antoine Nicolas SAMAHA
 * 
 * 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 com.foc.vaadin;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.util.Stack;

import com.foc.vaadin.gui.components.FVTextField;
import com.lowagie.text.Document;
import com.lowagie.text.PageSize;
import com.lowagie.text.Paragraph;
import com.lowagie.text.pdf.PdfWriter;
import com.vaadin.server.StreamResource.StreamSource;
import com.vaadin.ui.Component;

public class FPrint implements StreamSource {

    public final ByteArrayOutputStream os = new ByteArrayOutputStream();

    public FPrint(Stack<Component> stack) {
        Document document = null;
        try {
            document = new Document(PageSize.A4, 50, 50, 50, 50);

            PdfWriter.getInstance(document, os);
            document.open();
            ////////////////////////////////////////
            String value = null;
            String caption = null;
            while (!stack.isEmpty()) {
                Component comp = stack.pop();
                if (comp instanceof FVTextField) {
                    caption = ((FVTextField) comp).getCaption();
                    value = (String) ((FVTextField) comp).getValue();
                }

                document.add(new Paragraph("\n" + caption + ": " + value));

            }
            ////////////////////////////////////////
            Paragraph pp = new Paragraph();
            // Chapter ch = new Chapter();
            // ch.addSection(pp);

        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (document != null) {
                document.close();
            }
        }
    }

    @Override
    public InputStream getStream() {
        // Here we return the pdf contents as a byte-array
        return new ByteArrayInputStream(os.toByteArray());
    }
}