Examples of org.teiid.core.types.ClobImpl

org.teiid.core.types.ClobImpl
This object holds a chunk of char data and implements the JDBC Clob interface. This object presents a streaming interface and provides a way to access partial of the Clob data. Connectors can use this object when dealing with large objects.

            StreamFactoryReference sfr = new SQLXMLImpl();
            references.add(sfr);
            return sfr;
          } else if (obj instanceof ClobImpl) {
            streams.add(new ReaderInputStream(((ClobImpl)obj).getCharacterStream(), Charset.forName(Streamable.ENCODING)));
            StreamFactoryReference sfr = new ClobImpl();
            references.add(sfr);
            return sfr;
          } else if (obj instanceof BlobImpl) {
            streams.add(((Blob)obj).getBinaryStream());
            StreamFactoryReference sfr = new BlobImpl();
            references.add(sfr);
            return sfr;
          }
        } catch (SQLException e) {
          throw new IOException(e);
        }
      }
      else if (obj instanceof Serializable) {
        return obj;
      }
      else {
      try {
          if (obj instanceof Reader) {
            streams.add(new ReaderInputStream((Reader)obj, Charset.forName(Streamable.ENCODING)));
            StreamFactoryReference sfr = new SerializableReader();
            references.add(sfr);
            return sfr;
          } else if (obj instanceof InputStream) {
            streams.add((InputStream)obj);
            StreamFactoryReference sfr = new SerializableInputStream();
            references.add(sfr);
            return sfr;
          } else if (obj instanceof SQLXML) {
          streams.add(((SQLXML)obj).getBinaryStream());
            StreamFactoryReference sfr = new SQLXMLImpl();
            references.add(sfr);
            return sfr;
          } else if (obj instanceof Clob) {
            streams.add(new ReaderInputStream(((Clob)obj).getCharacterStream(), Charset.forName(Streamable.ENCODING)));
            StreamFactoryReference sfr = new ClobImpl();
            references.add(sfr);
            return sfr;
          } else if (obj instanceof Blob) {
            streams.add(((Blob)obj).getBinaryStream());
            StreamFactoryReference sfr = new BlobImpl();

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                  //transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes"); //$NON-NLS-1$
                  // Feed the resultant I/O stream into the XSLT processor
          transformer.transform(xmlParam, new StreamResult(writer));
        }
      });
      return new ClobType(new ClobImpl(result.getStreamFactory(), -1));
    } finally {
      Util.closeSource(styleSource);
      Util.closeSource(xmlSource);
    }
    }

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  public void testLobPeristence() throws Exception{
    
    BufferManagerImpl buffMgr = BufferManagerFactory.createBufferManager();
    FileStore fs = buffMgr.createFileStore("temp");
    
    ClobType clob = new ClobType(new ClobImpl(new InputStreamFactory() {
      @Override
      public InputStream getInputStream() throws IOException {
        return new ReaderInputStream(new StringReader("Clob contents One"),  Charset.forName(Streamable.ENCODING)); 
      }

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    } 
    
    public static Clob toChars(BlobType value, String encoding) {
      Charset cs = getCharset(encoding);
    BlobInputStreamFactory bisf = new BlobInputStreamFactory(value.getReference());
      ClobImpl clob = new ClobImpl(bisf, -1);
      clob.setCharset(cs);
      return new ClobType(clob);
    }

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    public ClobImpl getVDBResourceAsClob(String resourcePath) {
      final VirtualFile f = getFile(resourcePath);
      if (f == null) {
        return null;
      }
    return new ClobImpl(new VirtualFileInputStreamFactory(f), -1);
    }

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  @Test public void testReplaceObject() throws Exception {
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    ObjectEncoderOutputStream out = new ObjectEncoderOutputStream(new DataOutputStream(baos), 512);
    
    ClobImpl clob = new ClobImpl(new InputStreamFactory() {
      @Override
      public InputStream getInputStream() throws IOException {
        return new ReaderInputStream(new StringReader("Clob contents"),  Charset.forName(Streamable.ENCODING)); //$NON-NLS-1$
      }

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    try {
      if (lob instanceof BlobType) {
        persistedLob = new BlobType(new BlobImpl(isf));
      }
      else if (lob instanceof ClobType) {
        persistedLob = new ClobType(new ClobImpl(isf, ((ClobType)lob).length()));
      }
      else {
        persistedLob = new XMLType(new SQLXMLImpl(isf));
        ((XMLType)persistedLob).setEncoding(((XMLType)lob).getEncoding());
        ((XMLType)persistedLob).setType(((XMLType)lob).getType());

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  private Object serialize(XMLSerialize xs, XMLType value) throws TransformationException {
    if (xs.getType() == DataTypeManager.DefaultDataClasses.STRING) {
      return DataTypeManager.transformValue(value, xs.getType());
    }
    InputStreamFactory isf = getInputStreamFactory(value);
    return new ClobType(new ClobImpl(isf, -1));
  }

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    throw SqlUtil.createFeatureNotSupportedException();
  }


  public void setAsciiStream(int parameterIndex, final InputStream x)
      throws SQLException {
    this.setObject(parameterIndex, new ClobImpl(new InputStreamFactory() { 
      @Override
      public InputStream getInputStream() throws IOException {
        return x;
      }
    }, -1));

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  public void setClob(int parameterIndex, final Reader reader) throws SQLException {
    if (reader == null) {
      this.setObject(parameterIndex, null);
      return;
    }
    this.setObject(parameterIndex, new ClobImpl(new InputStreamFactory() {
      
      @Override
      public InputStream getInputStream() throws IOException {
        return new ReaderInputStream(reader, Charset.forName(Streamable.ENCODING));
      }

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org.teiid.common.buffer.LobManager

org.teiid.common.buffer.TestLobManager

org.teiid.core.util.ReaderInputStream

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org.teiid.jdbc.ResultSetImpl

org.teiid.netty.handler.codec.serialization.CompactObjectOutputStream

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