use of org.hl7.fhir.r5.model.ExpressionNode in project org.hl7.fhir.core by hapifhir.
the class FHIRPathEngine method evaluate.
/**
* evaluate a path and return the matching elements
*
* @param base - the object against which the path is being evaluated
* @param path - the FHIR Path statement to use
* @return
* @throws PathEngineException
* @throws FHIRLexerException
* @
* @
*/
public List<Base> evaluate(Object appContext, Resource resource, Base base, String path) throws PathEngineException, FHIRLexerException {
ExpressionNode exp = parse(path);
List<Base> list = new ArrayList<Base>();
if (base != null)
list.add(base);
log = new StringBuilder();
return execute(new ExecutionContext(appContext, resource, base, base), list, exp, true);
}
use of org.hl7.fhir.r5.model.ExpressionNode in project org.hl7.fhir.core by hapifhir.
the class FHIRPathEngine method funcSupersetOf.
private List<Base> funcSupersetOf(ExecutionContext context, List<Base> focus, ExpressionNode exp) throws FHIRException {
List<Base> target = execute(context, focus, exp.getParameters().get(0), true);
boolean valid = true;
for (Base item : target) {
boolean found = false;
for (Base t : focus) {
if (Base.compareDeep(item, t, false)) {
found = true;
break;
}
}
if (!found) {
valid = false;
break;
}
}
List<Base> result = new ArrayList<Base>();
result.add(new BooleanType(valid));
return result;
}
use of org.hl7.fhir.r5.model.ExpressionNode in project org.hl7.fhir.core by hapifhir.
the class FHIRPathEngine method funcIs.
private List<Base> funcIs(ExecutionContext context, List<Base> focus, ExpressionNode exp) throws PathEngineException {
List<Base> result = new ArrayList<Base>();
if (focus.size() == 0 || focus.size() > 1)
result.add(new BooleanType(false));
else {
String tn = exp.getParameters().get(0).getName();
result.add(new BooleanType(focus.get(0).hasType(tn)));
}
return result;
}
use of org.hl7.fhir.r5.model.ExpressionNode in project org.hl7.fhir.core by hapifhir.
the class FHIRPathEngine method funcExists.
private List<Base> funcExists(ExecutionContext context, List<Base> focus, ExpressionNode exp) {
List<Base> result = new ArrayList<Base>();
result.add(new BooleanType(!focus.isEmpty()));
return result;
}
use of org.hl7.fhir.r5.model.ExpressionNode in project org.hl7.fhir.core by hapifhir.
the class FHIRPathEngine method executeType.
private TypeDetails executeType(ExecutionTypeContext context, TypeDetails focus, ExpressionNode exp, boolean atEntry) throws PathEngineException, DefinitionException {
TypeDetails result = new TypeDetails(null);
switch(exp.getKind()) {
case Name:
if (atEntry && exp.getName().equals("$this"))
result.update(context.getContext());
else {
for (String s : focus.getTypes()) {
result.update(executeType(s, exp, atEntry));
}
if (result.hasNoTypes())
throw new PathEngineException("The name " + exp.getName() + " is not valid for any of the possible types: " + focus.describe());
}
break;
case Function:
result.update(evaluateFunctionType(context, focus, exp));
break;
case Constant:
result.addType(readConstantType(context, exp.getConstant()));
break;
case Group:
result.update(executeType(context, focus, exp.getGroup(), atEntry));
}
exp.setTypes(result);
if (exp.getInner() != null) {
result = executeType(context, result, exp.getInner(), false);
}
if (exp.isProximal() && exp.getOperation() != null) {
ExpressionNode next = exp.getOpNext();
ExpressionNode last = exp;
while (next != null) {
TypeDetails work;
if (last.getOperation() == Operation.Is || last.getOperation() == Operation.As)
work = executeTypeName(context, focus, next, atEntry);
else
work = executeType(context, focus, next, atEntry);
result = operateTypes(result, last.getOperation(), work);
last = next;
next = next.getOpNext();
}
exp.setOpTypes(result);
}
return result;
}
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