# OracleParameterBinders.java

    package org.codefilarete.stalactite.sql.statement.binder;

    import java.io.IOException;
    import java.sql.Blob;
    import java.sql.JDBCType;
    import java.sql.PreparedStatement;
    import java.sql.SQLException;
    import java.time.OffsetDateTime;
    import java.time.ZonedDateTime;

    import org.codefilarete.tool.io.IOs;

    /**
     * @author Guillaume Mary
     */
    public final class OracleParameterBinders {

    	/**
    	 * As of JDBC4, SQLite doesn't support setBinaryStream, therefore we use setBytes(..)
    	 */
    	public static final ParameterBinder<Blob> BLOB_BINDER = new NullAwareParameterBinder<>(
    			DefaultParameterBinders.BLOB_BINDER, new BlobWriter());
    	// Can also be done that wrapping setBinaryStream(..), but it doesn't call setBlob(..) which is preferred to match Binder philosophy
    	// DefaultParameterBinders.BINARYSTREAM_BINDER.wrap(inputStream -> new InMemoryBlobSupport(IOs.toByteArray(inputStream)), Blob::getBinaryStream);

    	/**
    	 * Oracle native support for {@link ZonedDateTime}
    	 */
    	public static final ParameterBinder<ZonedDateTime> ZONED_DATE_TIME_BINDER = new NullAwareParameterBinder<>(
    			new JdbcTypeResultSetReader<>(ZonedDateTime.class),
    			new JdbcTypePreparedStatementWriter<>(ZonedDateTime.class, JDBCType.TIMESTAMP_WITH_TIMEZONE));

    	/**
    	 * Oracle native support for {@link OffsetDateTime}
    	 */
    	public static final ParameterBinder<OffsetDateTime> OFFSET_DATE_TIME_BINDER = new NullAwareParameterBinder<>(
    			new JdbcTypeResultSetReader<>(OffsetDateTime.class),
    			new JdbcTypePreparedStatementWriter<>(OffsetDateTime.class, JDBCType.TIMESTAMP_WITH_TIMEZONE));

    	/**
    	 * Dedicated writer for Oracle Blobs that handles non Oracle Blob to avoid a ClassCastException meaning that
    	 * Oracle only support incoming oracle.sql.BLOB
    	 *
    	 * @author Guillaume Mary
    	 */
    	private static class BlobWriter implements PreparedStatementWriter<Blob> {

    		@Override
    		public Class<Blob> getType() {
    			return Blob.class;
    		}

    		@Override
    		public void set(PreparedStatement preparedStatement, int valueIndex, Blob blob) throws SQLException {
    			oracle.sql.BLOB oracleBlob;
    			if (blob instanceof oracle.sql.BLOB) {
    				oracleBlob = (oracle.sql.BLOB) blob;
    			} else {
    				oracleBlob = (oracle.sql.BLOB) preparedStatement.getConnection().createBlob();
    				try {
    					// note that setBytes(byte[]) is not supported
    					oracleBlob.setBytes(1, IOs.toByteArray(blob.getBinaryStream()));
    				} catch (IOException e) {
    					throw new RuntimeException(e);
    				}
    			}
    			preparedStatement.setBlob(valueIndex, oracleBlob);
    			// note that we shouldn't free the blob here since transaction is not yet complete
    			// oracleBlob.free();
    		}
    	}

    	private OracleParameterBinders() {
    	}
    }