org.unitils.dbunit.dataset.Column Maven / Gradle / Ivy
package org.unitils.dbunit.dataset;
import static org.dbunit.dataset.ITable.NO_VALUE;
import org.dbunit.dataset.datatype.DataType;
import org.dbunit.dataset.datatype.TypeCastException;
import org.unitils.core.UnitilsException;
import org.unitils.dbunit.dataset.comparison.ColumnDifference;
/**
* A column in a data set row
*
* @author Tim Ducheyne
* @author Filip Neven
*/
public class Column {
/* The name of the data set column */
private String name;
/* The type of the data set column, e.g. varchar */
private DataType type;
/* The actual value with a type corresponding the column type, e.g. String for varchar */
private Object value;
/**
* Creates a value
*
* @param name The name of the data set column, not null
* @param type The type of the data set column, e.g. varchar, not null
* @param value The actual value with a type corresponding the column type, e.g. String for varchar, can be null
*/
public Column(String name, DataType type, Object value) {
this.name = name;
this.type = type;
this.value = value;
}
/**
* @return The name of the data set column, not null
*/
public String getName() {
return name;
}
/**
* @return The type of the data set column, e.g. varchar, not null
*/
public DataType getType() {
return type;
}
/**
* @return The actual value with a type corresponding the column type, e.g. String for varchar, can be null
*/
public Object getValue() {
return value;
}
/**
* Gets the value casted to the given type.
*
* @param castType The type to cast the value to, not null
* @return The casted value
* @throws UnitilsException When the value cannot be cast
*/
public Object getCastedValue(DataType castType) {
try {
return castType.typeCast(value);
} catch (TypeCastException e) {
throw new UnitilsException("Unable to convert \"" + value + "\" to " + castType.toString() + ". Column name: " + name + ", current type: " + type.toString(), e);
}
}
/**
* Compares the column with the given actual column. If the actual column has a different type, the value
* will be casted to this type.
*
* @param actualColumn The column to compare with, not null
* @return The difference, null if none found
*/
public ColumnDifference compare(Column actualColumn) {
if (value == null || value.equals(NO_VALUE)) {
return null;
}
if (value == actualColumn.getValue()) {
return null;
}
if (value == null && actualColumn.getValue() != null) {
return new ColumnDifference(this, actualColumn);
}
Object castedValue = getCastedValue(actualColumn.getType());
if (castedValue == null && actualColumn.getValue() == null) {
return null;
} else if (castedValue == null && actualColumn.getValue() != null) {
return new ColumnDifference(this, actualColumn);
}
if (!castedValue.equals(actualColumn.getValue())) {
return new ColumnDifference(this, actualColumn);
}
return null;
}
}