dev 契约锁

P15GEN2\59518

2024-05-29 d4210c7c4b04abde20037ea8aa0f54ef8a2649aa

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package foundation.data.meta.field;
 
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
 
import foundation.persist.IMetaDataLoader;
import foundation.persist.NamedSQL;
import foundation.persist.SQLRunner;
import foundation.persist.source.NamedDataSource;
 
public class TableFieldLoader implements IMetaDataLoader {
    
    private NamedDataSource dataSource;
    private String tableName;
    private FieldsRuntime fieldsRuntime;
 
    public TableFieldLoader(NamedDataSource dataSource, String tableName) {
        this.dataSource = dataSource;
        this.tableName = tableName;
    }
    
    public FieldsRuntime getFieldsByTableResult() throws Exception {
        String sql = "select * from " + tableName + " where 1 <> 1";
        NamedSQL namedSQL = new NamedSQL("getMeta", sql);
        
        SQLRunner.getFieldsBySQL(dataSource, this, namedSQL);
        return this.fieldsRuntime;
    }
    
    public FieldsRuntime getFieldsByTableMeta() throws Exception {
        SQLRunner.getFieldsByMeta(dataSource, this, tableName);
        return this.fieldsRuntime;
    }    
 
    public FieldsRuntime getMetaByNamedSQL(NamedSQL namedSQL) throws Exception {
        this.tableName = namedSQL.getName();
        SQLRunner.getTableMetaData(dataSource, this, namedSQL);
        return this.fieldsRuntime;
    }
 
    public void load(ResultSetMetaData metaData) throws Exception {
        ResultMetaFieldReader fieldReader = new ResultMetaFieldReader(metaData);
        this.fieldsRuntime = FieldRuntimeCreator.create(fieldReader);
    }
    
    public void load(ResultSet resultSet) throws Exception {
        ResultSetFieldReader fieldReader = new ResultSetFieldReader(resultSet);
        this.fieldsRuntime = FieldRuntimeCreator.create(fieldReader);
    }
}