ObjectPopulator.java

package jef.database.wrapper.populator;

import java.sql.SQLException;
import java.util.Map;

import jef.database.DataObject;
import jef.database.DebugUtil;
import jef.database.IQueryableEntity;
import jef.database.LazyLoadProcessor;
import jef.database.dialect.type.ColumnMappings;
import jef.database.innerpool.InstancePopulator;
import jef.database.jdbc.result.IResultSet;
import jef.database.meta.ITableMetadata;
import jef.tools.reflect.BeanWrapper;

public final class ObjectPopulator implements InstancePopulator{
	ITableMetadata meta;
	Map<String,ColumnDescription> data;
	int bindRowidForColumn;
	LazyLoadProcessor processor;

	public ObjectPopulator(ITableMetadata meta,Map<String,ColumnDescription> data){
		this.meta=meta;
		this.data=data;
	}
	/**
	 * @param wrapper
	 * @param rs
	 * @return true if there is any valid field for thie object.
	 * @throws SQLException
	 */
	public boolean processOrNull(BeanWrapper wrapper, IResultSet rs) throws SQLException {
		boolean flag=false;
		for(Map.Entry<String,ColumnDescription> entry:data.entrySet()){
			String fieldName=entry.getKey();
			ColumnDescription c=entry.getValue();
			// Note: 使用getObject方法时，在Oracle 2008-2-2 10.2.4.0驱动下会变为getDate()，从而丢失时分秒。
			Object obj=c.getAccessor().jdbcGet(rs, c.getN());
			if(!flag && obj!=null){
				flag=true;
			}
			if(obj!=null){
				wrapper.setPropertyValue(fieldName, obj);
			}
		}
		
		if(bindRowidForColumn>0){
			String rowid=(String)ColumnMappings.ROWID.jdbcGet(rs, bindRowidForColumn);
			((IQueryableEntity) wrapper.getWrapped()).bindRowid(rowid);
		}
		if(processor!=null){
			DataObject da = (DataObject) wrapper.getWrapped();
			DebugUtil.addLazy(da, processor);
		}
		return flag;
	}
	
	public void process(BeanWrapper wrapper, IResultSet rs) throws SQLException {
		for(Map.Entry<String,ColumnDescription> entry:data.entrySet()){
			String fieldName=entry.getKey();
			ColumnDescription c=entry.getValue();
			// Note: 使用getObject方法时，在Oracle 2008-2-2 10.2.4.0驱动下会变为getDate()，从而丢失时分秒。
			Object obj=c.getAccessor().jdbcGet(rs, c.getN());
			wrapper.setPropertyValue(fieldName, obj);
		}
		if(bindRowidForColumn>0){
			String rowid=(String)ColumnMappings.ROWID.jdbcGet(rs, bindRowidForColumn);
			((IQueryableEntity) wrapper.getWrapped()).bindRowid(rowid);
		}
		if(processor!=null){
			DataObject da = (DataObject) wrapper.getWrapped();
			DebugUtil.addLazy(da, processor);
		}
	}
	
	
	public void setProcessor(LazyLoadProcessor processor) {
		this.processor = processor;
	}
	

	public IQueryableEntity instance() {
		IQueryableEntity entity=meta.newInstance();
		entity.stopUpdate();
		return entity;
	}
	
	public Class<?> getObjectType(){
		return meta.getContainerType();
	}
}