oracle.toplink.essentials.querykeys.DirectQueryKey Maven / Gradle / Ivy
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package oracle.toplink.essentials.querykeys;
import oracle.toplink.essentials.internal.helper.DatabaseField;
import oracle.toplink.essentials.descriptors.ClassDescriptor;
/**
*
* Purpose: Define an alias to a database field.
*
* Responsibilities:
*
* - Define the field that is being aliased.
*
*/
public class DirectQueryKey extends QueryKey {
DatabaseField field;
/**
* INTERNAL:
* Return the field for the query key.
*/
public DatabaseField getField() {
return field;
}
/**
* PUBLIC:
* Return the field name for the query key.
*/
public String getFieldName() {
return getField().getName();
}
/**
* PUBLIC:
* Return the qualified field name for the query key.
*/
public String getQualifiedFieldName() {
return getField().getQualifiedName();
}
/**
* INTERNAL:
* Initialize any information in the receiver that requires its descriptor.
* Set the receiver's descriptor back reference.
* @param descriptor is the owner descriptor of the receiver.
*/
public void initialize(ClassDescriptor descriptor) {
super.initialize(descriptor);
if (!getField().hasTableName()) {
getField().setTable(descriptor.getDefaultTable());
}
}
/**
* INTERNAL:
* override the isDirectQueryKey() method in the superclass to return true.
* @return boolean
*/
public boolean isDirectQueryKey() {
return true;
}
/**
* INTERNAL:
* Set the field for the query key.
*/
public void setField(DatabaseField field) {
this.field = field;
}
/**
* PUBLIC:
* Set the field name for the query key.
*/
public void setFieldName(String fieldName) {
setField(new DatabaseField(fieldName));
}
}