Revision 10627 trunk/libraries/libGDBMS/src/main/java/com/hardcode/gdbms/engine/data/driver/ReadAccess.java
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package com.hardcode.gdbms.engine.data.driver; |
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import com.hardcode.gdbms.driver.exceptions.ReadDriverException; |
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import com.hardcode.gdbms.engine.values.Value; |
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* |
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* @return subclase de Value con el valor del origen de datos. Never null (use |
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* ValueFactory.createNullValue() instead) |
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* |
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* @throws DriverException Si se produce un error accediendo al DataSource |
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* @throws ReadDriverException TODO |
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*/ |
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public abstract Value getFieldValue(long rowIndex, int fieldId) |
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throws DriverException; |
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throws ReadDriverException;
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/** |
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* Obtiene el n?mero de campos del DataSource |
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* |
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* @return |
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* |
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* @throws DriverException Si se produce alg?n error accediendo al |
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* DataSource |
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* @throws ReadDriverException TODO |
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*/ |
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public abstract int getFieldCount() throws DriverException; |
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public abstract int getFieldCount() throws ReadDriverException;
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/** |
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* Devuelve el nombre del campo fieldId-?simo |
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* @param fieldId ?ndice del campo cuyo nombre se quiere obtener |
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* |
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* @return |
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* |
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* @throws DriverException Si se produce alg?n error accediendo al |
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* DataSource |
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* @throws ReadDriverException TODO |
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*/ |
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public abstract String getFieldName(int fieldId) throws DriverException; |
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public abstract String getFieldName(int fieldId) throws ReadDriverException;
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/** |
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* Obtiene el n?mero de registros del DataSource |
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* |
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* @return |
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* |
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* @throws DriverException Si se produce alg?n error accediendo al |
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* DataSource |
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* @throws ReadDriverException TODO |
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*/ |
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public abstract long getRowCount() throws DriverException; |
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public abstract long getRowCount() throws ReadDriverException;
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/** |
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* Devuelve el tipo del campo i?simo. Devuelve una constante de la clase |
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* @param i ?ndice del campo cuyo tipo se quiere conocer |
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* |
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* @return Class |
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* |
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* @throws DriverException Si se produce un error accediendo a los tipos de |
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* datos |
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* @throws ReadDriverException TODO |
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*/ |
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public abstract int getFieldType(int i) throws DriverException; |
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public abstract int getFieldType(int i) throws ReadDriverException;
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/** |
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* Devuelve el ancho del campo i?simo. |
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* @param i ?ndice del campo cuyo ancho se quiere conocer |
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* |
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* @return int |
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* |
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* @throws DriverException Si se produce un error accediendo a los tipos de |
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* datos |
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* @throws ReadDriverException TODO |
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*/ |
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public abstract int getFieldWidth(int i) throws DriverException; |
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public abstract int getFieldWidth(int i) throws ReadDriverException;
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} |
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