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package oracle.toplink.essentials.internal.ejb.cmp3.metadata.columns;
import java.lang.reflect.AnnotatedElement;
import javax.persistence.Column;
import javax.persistence.AttributeOverride;
import oracle.toplink.essentials.internal.ejb.cmp3.metadata.accessors.MetadataAccessor;
import oracle.toplink.essentials.internal.helper.DatabaseField;
/**
* Object to hold onto column metadata in a TopLink database field.
*
* @author Guy Pelletier
* @since TopLink EJB 3.0 Reference Implementation
*/
public class MetadataColumn {
protected String m_attributeName;
protected DatabaseField m_databaseField;
protected AnnotatedElement m_annotatedElement;
public static final int DEFAULT_SCALE = 0;
public static final int DEFAULT_LENGTH = 255;
public static final int DEFAULT_PRECISION = 0;
public static final String DEFAULT_NAME = "";
public static final String DEFAULT_TABLE = "";
public static final String DEFAULT_COLUMN_DEFINITION = "";
public static final boolean DEFAULT_UNIQUE = false;
public static final boolean DEFAULT_NULLABLE = true;
public static final boolean DEFAULT_UPDATABLE = true;
public static final boolean DEFAULT_INSERTABLE = true;
/**
* INTERNAL:
* Called for attribute overrides.
*/
public MetadataColumn(AttributeOverride attributeOverride, AnnotatedElement annotatedElement) {
this(attributeOverride.column(), attributeOverride.name(), annotatedElement);
}
/**
* INTERNAL:
* Called for basic mappings.
*/
public MetadataColumn(Column column, MetadataAccessor accessor) {
this(column, accessor.getAttributeName(), accessor.getAnnotatedElement());
}
/**
* INTERNAL:
*/
public MetadataColumn(Column column, String attributeName, AnnotatedElement annotatedElement) {
this(attributeName, annotatedElement);
if (column != null) {
// Apply the values from the column annotation.
m_databaseField.setUnique(column.unique());
m_databaseField.setNullable(column.nullable());
m_databaseField.setUpdatable(column.updatable());
m_databaseField.setInsertable(column.insertable());
m_databaseField.setScale(column.scale());
m_databaseField.setLength(column.length());
m_databaseField.setPrecision(column.precision());
m_databaseField.setName(column.name());
m_databaseField.setTableName(column.table());
m_databaseField.setColumnDefinition(column.columnDefinition());
}
}
/**
* INTERNAL:
* Initialize the database field with the default values.
*/
public MetadataColumn(String attributeName, AnnotatedElement annotatedElement) {
m_attributeName = attributeName;
m_annotatedElement = annotatedElement;
m_databaseField = new DatabaseField();
// Apply default values.
m_databaseField.setUnique(DEFAULT_UNIQUE);
m_databaseField.setNullable(DEFAULT_NULLABLE);
m_databaseField.setUpdatable(DEFAULT_UPDATABLE);
m_databaseField.setInsertable(DEFAULT_INSERTABLE);
m_databaseField.setScale(DEFAULT_SCALE);
m_databaseField.setLength(DEFAULT_LENGTH);
m_databaseField.setPrecision(DEFAULT_PRECISION);
m_databaseField.setName(DEFAULT_NAME);
m_databaseField.setTableName(DEFAULT_TABLE);
m_databaseField.setColumnDefinition(DEFAULT_COLUMN_DEFINITION);
}
/**
* INTERNAL:
*/
public AnnotatedElement getAnnotatedElement() {
return m_annotatedElement;
}
/**
* INTERNAL:
*/
public String getAttributeName() {
return m_attributeName;
}
/**
* INTERNAL:
*/
public DatabaseField getDatabaseField() {
return m_databaseField;
}
/**
* INTERNAL:
*/
public String getUpperCaseAttributeName() {
return m_attributeName.toUpperCase();
}
/**
* INTERNAL:
*/
public boolean loadedFromXML() {
return false;
}
/**
* INTERNAL:
*
* This method will get called if we have an attribute override that
* overrides another attribute override. See EmbeddedAccessor.
*/
public void setDatabaseField(DatabaseField databaseField) {
m_databaseField = databaseField;
}
}