bundles/org.simantics.document.linking.ui/src/org/simantics/document/linking/report/html/HTMLStreamElement.java

   1 package org.simantics.document.linking.report.html;
   2
   3 import java.io.BufferedInputStream;
   4 import java.io.File;
   5 import java.io.FileInputStream;
   6 import java.io.IOException;
   7 import java.io.PrintStream;
   8
   9 /**
  10  * Base class for single HTML stream.
  11  *
  12  * @author Marko Luukkainen <marko.luukkainen@vtt.fi>
  13  *
  14  */
  15
  16 public class HTMLStreamElement implements HTMLElement{
  17
  18         protected HTMLStreamElement parent;
  19         protected File file;
  20         protected PrintStream os;
  21
  22         public HTMLStreamElement(File file) throws Exception{
  23                 parent = null;
  24                 this.file = file;
  25                 os = new PrintStream(file,"UTF-8"); //$NON-NLS-1$
  26         }
  27
  28         public HTMLStreamElement(HTMLStreamElement parent) throws Exception{
  29                 this.parent = parent;
  30                 openStream();
  31         }
  32
  33         private void openStream() throws IOException {
  34                 file = File.createTempFile("report_content", ".html"); //$NON-NLS-1$ //$NON-NLS-2$
  35                 os = new PrintStream(file,"UTF-8"); //$NON-NLS-1$
  36         }
  37
  38
  39         protected void copyData(File source, PrintStream dest)throws Exception {
  40                 BufferedInputStream is = new BufferedInputStream(new FileInputStream(source));
  41                 while (true) {
  42                         int read = is.read();
  43                         if (read == -1)
  44                                 break;
  45                         dest.write(read);
  46                 }
  47                 is.close();
  48         }
  49
  50         public PrintStream getPrintStream() {
  51                 return os;
  52         }
  53
  54         /**
  55          * Closes the stream and copies the contents to the parent stream.
  56          * @throws Exception
  57          */
  58         public void close() throws Exception {
  59                 os.flush();
  60                 os.close();
  61                 if (parent != null) {
  62                         copyData(file, parent.os);
  63                         file.delete();
  64                 }
  65                 os = null;
  66         }
  67
  68         @Override
  69         public String getId() {
  70                 return null;
  71         }
  72 }