Examples with ExpressionNode org.hl7.fhir.dstu2.model.ExpressionNode used on opensource projects

Example 21 with ExpressionNode

use of org.hl7.fhir.dstu2.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);
}

Example 22 with ExpressionNode

use of org.hl7.fhir.dstu2.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;
}

Example 23 with ExpressionNode

use of org.hl7.fhir.dstu2.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;
}

Example 24 with ExpressionNode

use of org.hl7.fhir.dstu2.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;
}

Example 25 with ExpressionNode

use of org.hl7.fhir.dstu2.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;
}