Examples of java.io.ObjectInputStream

java.io.ObjectInputStream
An ObjectInputStream can be used to load Java objects from a stream where the objects were saved using an ObjectOutputStream. Primitive data (ints, bytes, chars, etc) can also be loaded if the data was saved as primitive types as well. It is invalid to attempt to read an object as primitive data. @see ObjectOutputStream @see ObjectInput @see Serializable @see Externalizable

            byte[] b = new byte[size];
            s.readFully(b, 0, size);
            this.ser23 = b;


            FastByteArrayInputStream bis3 = new FastByteArrayInputStream(b);
            ObjectInputStream ois3 = new ObjectInputStream(bis3);
            this.student2 = (Student) ois3.readObject();
            this.student3 = (Student) ois3.readObject();
        }

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        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        ObjectOutputStream oos = new ObjectOutputStream(baos);
        oos.writeObject(list1);


        ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());
        ObjectInputStream ois = new ObjectInputStream(bais);


        TLinkedList list2 = (TLinkedList) ois.readObject();
        assertEquals(list1, list2);
    }

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   * @see org.objectweb.joram.shared.stream.Streamable#readFrom(java.io.InputStream)
   */
  public void readFrom(InputStream is) throws IOException {
    principal = StreamUtil.readStringFrom(is);
    ByteArrayInputStream bais = null;
    ObjectInputStream ois = null;
    try {
      byte[] subByte = StreamUtil.readByteArrayFrom(is);
      bais = new ByteArrayInputStream(subByte);
      ois = new ObjectInputStream(bais);
      try {
        subject = (Subject) ois.readObject();
      } catch (ClassNotFoundException e) {
        if (logger.isLoggable(BasicLevel.ERROR))
          logger.log(BasicLevel.ERROR, "EXCEPTION:: readFrom", e);
        throw new IOException(e.getMessage());
      }
    } finally {
      try {
        ois.close();
      } catch (IOException exc) {}
      try {
        bais.close();
      } catch (IOException exc) {}
    }

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  }




  private ObjectInputStream getObjectInputStream(File f) throws IOException {
    return new ObjectInputStream(new BufferedInputStream(new FileInputStream(f), 0x4000));
  }

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        ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream(saved));
        out.writeObject(cv);
        out.close();
        
        // now read back the object from serilized state
        ObjectInputStream in = new ObjectInputStream(new FileInputStream(saved));
        ClobType read = (ClobType)in.readObject();
        
        assertTrue(read.length() > 0);
                
        // make sure we have kept the reference stream id
        assertEquals(key, read.getReferenceStreamId());

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    ByteArrayOutputStream baos = new ByteArrayOutputStream();
        ObjectOutputStream oos = new ObjectOutputStream(baos);
        oos.writeObject(object);
        oos.flush();
        
        ObjectInputStream ois = new ObjectInputStream(new ByteArrayInputStream(baos.toByteArray()));
        
        return (T)ois.readObject();
  }

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    public void testEmptyCollection() throws Exception {
      ExternalizeUtil.writeCollection(oout, Arrays.asList(new Object[0]));
      oout.flush();        
        ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
        ObjectInputStream oin = new ObjectInputStream(bin);
        
        List<?> result = ExternalizeUtil.readList(oin);
        assertEquals(0, result.size());
    }

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        ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream(saved));
        out.writeObject(bv);
        out.close();
        
        // now read back the object from serilized state
        ObjectInputStream in = new ObjectInputStream(new FileInputStream(saved));
        BlobType read = (BlobType)in.readObject();
                
        // make sure we have kept the reference stream id
        assertEquals(key, read.getReferenceStreamId());
        
        // and lost the original object

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        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        ObjectOutputStream oos = new ObjectOutputStream(baos);
        oos.writeObject(result);
        
        ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());
        ObjectInputStream ois = new ObjectInputStream(bais);
        result = ois.readObject();
        
        ArrayList clearObject = (ArrayList)randomSymCryptor.unsealObject(result);
        
        assertEquals(test, clearObject);

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            final ObjectOutputStream out = new ObjectOutputStream(fbos);
            out.writeObject(orig);
            out.flush();
            out.close();
            // read an object
            final ObjectInputStream in = new ObjectInputStream(fbos.getInputStream());
            obj = in.readObject();
        } catch (IOException e) {
            throw new IllegalStateException(e);
        } catch (ClassNotFoundException cnfe) {
            throw new IllegalStateException(cnfe);
        }

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