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  package org.apache.cayenne.dba.oracle;
  
  import org.apache.cayenne.access.DataNode;
  import org.apache.cayenne.access.types.ExtendedType;
  import org.apache.cayenne.access.types.ExtendedTypeFactory;
  import org.apache.cayenne.access.types.ValueObjectTypeRegistry;
  import org.apache.cayenne.configuration.Constants;
  import org.apache.cayenne.configuration.RuntimeProperties;
  import org.apache.cayenne.di.Inject;
  import org.apache.cayenne.query.Query;
  import org.apache.cayenne.query.SQLAction;
  import org.apache.cayenne.resource.ResourceLocator;
  
  import java.lang.reflect.Method;
  import java.net.URL;
  import java.sql.Types;
  import java.util.List;
  
  /**
   * A flavor of OracleAdapter that implements workarounds for some old driver
   * limitations.
   * 
   * @since 1.2
   */
  public class Oracle8Adapter extends OracleAdapter {
  
  	private static Method outputStreamFromBlobMethod;
  	private static Method writerFromClobMethod;
  
  	static {
  		initOracle8DriverInformation();
  	}
  
  	public Oracle8Adapter(@Inject RuntimeProperties runtimeProperties,
  						  @Inject(Constants.DEFAULT_TYPES_LIST) List<ExtendedType> defaultExtendedTypes,
  						  @Inject(Constants.USER_TYPES_LIST) List<ExtendedType> userExtendedTypes,
  						  @Inject(Constants.TYPE_FACTORIES_LIST) List<ExtendedTypeFactory> extendedTypeFactories,
  						  @Inject(Constants.RESOURCE_LOCATOR) ResourceLocator resourceLocator,
  						  @Inject ValueObjectTypeRegistry valueObjectTypeRegistry) {
  		super(runtimeProperties, defaultExtendedTypes, userExtendedTypes, extendedTypeFactories, resourceLocator, valueObjectTypeRegistry);
  	}
  
  	private static void initOracle8DriverInformation() {
  		initDone = true;
  
  		// configure static information
  		try {
  			outputStreamFromBlobMethod = Class.forName("oracle.sql.BLOB").getMethod("getBinaryOutputStream");
  			writerFromClobMethod = Class.forName("oracle.sql.CLOB").getMethod("getCharacterOutputStream");
  		} catch (Throwable th) {
  			// ignoring...
  		}
  	}
  
  	static Method getWriterFromClobMethod() {
  		return writerFromClobMethod;
  	}
  
  	static Method getOutputStreamFromBlobMethod() {
  		return outputStreamFromBlobMethod;
  	}
  
  	/**
  	 * Uses OracleActionBuilder to create the right action.
  	 */
  	@Override
  	public SQLAction getAction(Query query, DataNode node) {
  		return query.createSQLAction(new Oracle8ActionBuilder(node));
  	}
  
  	@Override
  	protected URL findResource(String name) {
  
  		if ("/types.xml".equals(name)) {
  			name = "/types-oracle8.xml";
  		}
  
  		return super.findResource(name);
  	}
  
  	/**
  	 * @since 5.0
  	 */
  	@Override
  	public boolean typeSupportsScale(int type) {
  		return type != Types.TIMESTAMP && super.typeSupportsScale(type);
  	}
  }
  