corner.orm.tapestry.pdf.PdfOutputPageEvent.java Source code

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Here is the source code for corner.orm.tapestry.pdf.PdfOutputPageEvent.java

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// Copyright 2007 the original author or authors.
// site: http://www.bjmaxinfo.com
// file: $Id: PdfOutputPageEvent.java 3678 2007-11-14 04:43:52Z jcai $
// created at:2007-07-31
//
// 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 corner.orm.tapestry.pdf;

import java.io.IOException;

import com.lowagie.text.Document;
import com.lowagie.text.pdf.PdfContentByte;
import com.lowagie.text.pdf.PdfImportedPage;
import com.lowagie.text.pdf.PdfPageEventHelper;
import com.lowagie.text.pdf.PdfReader;
import com.lowagie.text.pdf.PdfWriter;

/**
 * pdf??
 * 
 * @author jcai
 * @author <a href=mailto:Ghostbb@bjmaxinfo.com>Ghostbb</a>
 * @version $Revision: 3678 $
 * @since 2.3.7
 */
public class PdfOutputPageEvent extends PdfPageEventHelper {

    /** ?? * */
    private PdfReader reader = null;

    /** ??pdf * */
    private PdfContentByte canvas;

    public PdfOutputPageEvent(PdfReader reader) {
        this.reader = reader;
    }

    public PdfOutputPageEvent(IPdfPage pdfComponent) {
        try {
            reader = new PdfReader(pdfComponent.getSpecification().getSpecificationLocation().getResourceURL());
        } catch (IOException e) {
            throw new PdfSystemException(e);
        }
    }

    /**
     * ??
     * 
     * @see com.lowagie.text.pdf.PdfPageEventHelper#onOpenDocument(com.lowagie.text.pdf.PdfWriter,
     *      com.lowagie.text.Document)
     */
    @Override
    public void onOpenDocument(PdfWriter writer, Document doc) {
        canvas = writer.getDirectContentUnder();
    }

    //??itext???pages
    private void createBurdenText(PdfWriter writer) {
        PdfContentByte content = writer.getDirectContent();
        content.beginText();
        content.endText();
    }

    public void addTemplateData(PdfWriter writer, Document doc, int templatePageNum) {
        PdfImportedPage templateData = writer.getImportedPage(reader, templatePageNum);
        createBurdenText(writer);
        canvas.addTemplate(templateData, 0, 0);
    }
}