重建包名

org.hibernate.type.descriptor.sql

重建类BasicBinder 

代码如下

package org.hibernate.type.descriptor.sql;

import java.sql.PreparedStatement;
import java.sql.SQLException;

import org.hibernate.internal.CoreLogging;
import org.hibernate.type.descriptor.JdbcTypeNameMapper;
import org.hibernate.type.descriptor.ValueBinder;
import org.hibernate.type.descriptor.WrapperOptions;
import org.hibernate.type.descriptor.java.JavaTypeDescriptor;
import org.jboss.logging.Logger;

public abstract class BasicBinder<J> implements ValueBinder<J>{

    private static final Logger log = CoreLogging.logger( BasicBinder.class );

    private static final String BIND_MSG_TEMPLATE = "binding parameter [%s] as [%s] - [%s]";
    private static final String NULL_BIND_MSG_TEMPLATE = "binding parameter [%s] as [%s] - [null]";

	private final JavaTypeDescriptor<J> javaDescriptor;
	private final SqlTypeDescriptor sqlDescriptor;

	public JavaTypeDescriptor<J> getJavaDescriptor() {
		return javaDescriptor;
	}

	public SqlTypeDescriptor getSqlDescriptor() {
		return sqlDescriptor;
	}

	public BasicBinder(JavaTypeDescriptor<J> javaDescriptor, SqlTypeDescriptor sqlDescriptor) {
		this.javaDescriptor = javaDescriptor;
		this.sqlDescriptor = sqlDescriptor;
	}

	@Override
	public final void bind(PreparedStatement st, J value, int index, WrapperOptions options) throws SQLException {
        final boolean traceEnabled = log.isTraceEnabled();
      
        if ( value == null ) {
            if ( traceEnabled ) {
                log.trace(
						String.format(
								NULL_BIND_MSG_TEMPLATE,
								index,
								JdbcTypeNameMapper.getTypeName( getSqlDescriptor().getSqlType() )
						)
				);
            }
            st.setNull( index, sqlDescriptor.getSqlType() );
        }
        else {
            if ( traceEnabled ) {
                log.trace(
						String.format(
								BIND_MSG_TEMPLATE,
								index,
								JdbcTypeNameMapper.getTypeName( sqlDescriptor.getSqlType() ),
								getJavaDescriptor().extractLoggableRepresentation( value )
						)
				);
            }
            
            doBind( st, value, index, options );
        }
       
        System.out.println(st.toString());
	}

	/**
	 * Perform the binding.  Safe to assume that value is not null.
	 *
	 * @param st The prepared statement
	 * @param value The value to bind (not null).
	 * @param index The index at which to bind
	 * @param options The binding options
	 *
	 * @throws SQLException Indicates a problem binding to the prepared statement.
	 */
	protected abstract void doBind(PreparedStatement st, J value, int index, WrapperOptions options) throws SQLException;


}

  因为在hibernate机制中,就是用这个类是是执行更新插入sql语句的类,这里重写,把它覆盖

posted on 2015-12-23 08:32  新生团队  阅读(5166)  评论(0编辑  收藏  举报