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better error handling loading resources

This commit is contained in:
Grahame Grieve 2023-06-27 22:18:35 +10:00
parent 1a144091c4
commit 3bb5e8d06d
1 changed files with 15 additions and 3 deletions
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16
org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/elementmodel/ParserBase.java
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@ -35,6 +35,7 @@ import java.io.IOException;
import java.io.InputStream; import java.io.InputStream;
import java.io.OutputStream; import java.io.OutputStream;
import java.util.List; import java.util.List;
import java.util.ArrayList;
import org.hl7.fhir.exceptions.DefinitionException; import org.hl7.fhir.exceptions.DefinitionException;
import org.hl7.fhir.exceptions.FHIRException; import org.hl7.fhir.exceptions.FHIRException;
@ -125,11 +126,14 @@ public abstract class ParserBase {
public abstract List<NamedElement> parse(InputStream stream) throws IOException, FHIRFormatError, DefinitionException, FHIRException; public abstract List<NamedElement> parse(InputStream stream) throws IOException, FHIRFormatError, DefinitionException, FHIRException;
public Element parseSingle(InputStream stream) throws IOException, FHIRFormatError, DefinitionException, FHIRException { public Element parseSingle(InputStream stream) throws IOException, FHIRFormatError, DefinitionException, FHIRException {
if (errors == null) {
errors = new ArrayList<>();
}
List<NamedElement> res = parse(stream); List<NamedElement> res = parse(stream);
if (res == null) { if (res == null) {
throw new FHIRException("Parsing FHIR content failed: "+errors.get(0).summary()); throw new FHIRException("Parsing FHIR content failed: "+errorSummary());
} else if (res.size() == 0) { } else if (res.size() == 0) {
throw new FHIRException("Parsing FHIR content returned no elements in a context where one element is required because: "+errors.get(0).summary()); throw new FHIRException("Parsing FHIR content returned no elements in a context where one element is required because: "+errorSummary());
} }
if (res.size() != 1) { if (res.size() != 1) {
throw new FHIRException("Parsing FHIR content returned multiple elements in a context where only one element is allowed"); throw new FHIRException("Parsing FHIR content returned multiple elements in a context where only one element is allowed");
@ -137,6 +141,14 @@ public abstract class ParserBase {
return res.get(0).getElement(); return res.get(0).getElement();
} }
private String errorSummary() {
if (errors == null || errors.size() == 0) {
return "(no error description)";
} else {
return errors.get(0).summary();
}
}
public abstract void compose(Element e, OutputStream destination, OutputStyle style, String base) throws FHIRException, IOException; public abstract void compose(Element e, OutputStream destination, OutputStyle style, String base) throws FHIRException, IOException;
//FIXME: i18n should be done here //FIXME: i18n should be done here