I wrote up a method using LightHL7Lib:
public void assertMessagesEqual(Hl7Record expected, Hl7Record actual) {
List<String> headers = expected.listSegments();
headers.addAll(actual.listSegments());
assertEquals(expected.listSegments(), actual.listSegments());
Set<String> segments = new TreeSet<String>(headers);
for (String segmentName : segments) {
if (segmentName.contains("|")) {
break;
}
int i = 0;
while (true) {
i++;
Hl7Segment expectedSeg = expected.getSegment(segmentName, i);
Hl7Segment actualSeg = actual.getSegment(segmentName, i);
if (expectedSeg == null && actualSeg == null) {
break;
}
if (expectedSeg == null || actualSeg == null) {
assertEquals("Comparing " + segmentName + "[" + i + "].",expectedSeg,
actualSeg);
}
assertNotNull("Comparing " + segmentName + "[" + i + "].", actualSeg);
int j ;
if (segmentName.equals("MSH")) {
j = 2;
} else {
j = 1;
}
int maxFields = expectedSeg.fieldAll().length;
if (maxFields < actualSeg.fieldAll().length) {
maxFields = actualSeg.fieldAll().length;
}
for ( /*Use j as is*/; j <= maxFields ; j++) {
if (expectedSeg.field(j) == null /*||
expectedSeg.field(j).toString().length() == 0*/) {
continue;
}
/* Check if field exists */
assertNotNull("Comparing " + segmentName + "[" + i + "]." + j,
actualSeg.field(j));
if (expectedSeg.field(j).getCompCount() > 1) {
/* Check components */
for (int k = 0; k < expectedSeg.field(j).getCompCount(); k++) {
if (expectedSeg.field(j)
.getComp(k + 1) == null /*||
expectedSeg.field(j).getComp(k+1).toString().length() == 0*/) {
continue;
}
assertNotNull("Comparing " + segmentName + "[" + i + "]." + j +
"." + k,
actualSeg.field(j).getComp(k + 1));
if (expectedSeg.field(j).getComp(k + 1).getSubcompCount() > 1) {
/* Check subcomponents */
for (int l = 0; l < expectedSeg.field(j).getComp(k +
1).getSubcompCount(); l++) {
if (expectedSeg.field(j).getComp(k + 1).getSubcomp(l + 1) ==
null
/*||
expectedSeg.field(j).getComp(k+1).getSubcomp(l+1).toString().length() == 0*/) {
continue;
}
assertNotNull("Comparing " + segmentName + "[" + i + "]." + j
+ "." + k + "." + l,
actualSeg.field(j).getComp(k + 1).getSubcomp(l + 1));
assertEquals("Comparing " + segmentName + "[" + i + "]." + j
+ "." + k + "." + l,
expectedSeg.field(j).getComp(k + 1).getSubcomp(l +
1).toString(),
actualSeg.field(j).getComp(k + 1).getSubcomp(l +
1).toString());
}
} else {
assertEquals("Comparing " + segmentName + "[" + i + "]." + j +
"." + (k + 1),
expectedSeg.field(j).getComp(k + 1).toString().trim(),
actualSeg.field(j).getComp(k + 1).toString().trim());
}
}
} else {
assertEquals("Comparing " + segmentName + "[" + i + "]." + j,
expectedSeg.field(j).toString().trim(),
actualSeg.field(j).toString().trim());
}
}
}
}
}
It gives detailed information on which segment and which field are different.
Better than plain diff, but not using HAPI.
R,
rahul
On Aug 8, 2012, at 8:58 AM, Derek Mahar wrote:
> Is comparing the string representation of a HAPI message the only way to
> compare messages? We noticed that HAPI messages don't redefine method
> equals(), so comparisons using JUnit assertions or Mockito verify() calls
> must use Object.equals() which compares object identity, not contents. Are
> there any plans to implement methods equals() and hashCode() in messages and
> segments?
smime.p7s
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