ca.uhn.hl7v2.util.DeepCopy Maven / Gradle / Ivy
package ca.uhn.hl7v2.util;
import ca.uhn.hl7v2.model.DataTypeException;
import ca.uhn.hl7v2.HL7Exception;
import ca.uhn.hl7v2.model.*;
/**
* Tools for copying data recurvisely from one message element into another. Currently only Types are
* supported.
* @author Bryan Tripp
*/
public class DeepCopy {
/**
* Copies data from the "from" Type into the "to" Type. Either Type may be
* a Primitive, Composite, or Varies. If a Varies is provided, the operation is
* performed on the result of calling its getData() method. A Primitive may be
* copied into a Composite, in which case the value is copied into the first
* component of the Composite. A Composite may be copied into a Primitive,
* in which case the first component is copied. Given Composites with different
* numbers of components, the first components are copied, up to the length
* of the smaller one.
*
* @param from type to copy from
* @param to type to copy to
* @throws DataTypeException if the types are not compatible
*/
public static void copy(Type from, Type to) throws DataTypeException {
for (int i = 1; i <= Terser.numComponents(from); i++) {
for (int j = 1; j <= Terser.numSubComponents(from, i); j++) {
String val = Terser.getPrimitive(from, i, j).getValue();
Terser.getPrimitive(to, i, j).setValue(val);
}
}
}
/**
* Copies contents from the source segment to the destination segment. This
* method calls copy(Type, Type) on each repetition of each field (see additional
* behavioural description there). An attempt is made to copy each repetition of
* each field in the source segment, regardless of whether the corresponding
* destination field is repeating or even exists.
*
* @param from the segment from which data are copied
* @param to the segment into which data are copied
* @throws HL7Exception if an error occurred while copying
*/
public static void copy(Segment from, Segment to) throws HL7Exception {
int n = from.numFields();
for (int i = 1; i <= n; i++) {
Type[] reps = from.getField(i);
for (int j = 0; j < reps.length; j++) {
copy(reps[j], to.getField(i, j));
}
}
}
}