Examples with PathEngineException org.hl7.fhir.exceptions.PathEngineException used on opensource projects

Example 6 with PathEngineException

use of org.hl7.fhir.exceptions.PathEngineException in project org.hl7.fhir.core by hapifhir.

the class FHIRPathEngine method execute.

private List<Base> execute(ExecutionContext context, List<Base> focus, ExpressionNode exp, boolean atEntry) throws PathEngineException {
    // System.out.println("Evaluate {'"+exp.toString()+"'} on "+focus.toString());
    List<Base> work = new ArrayList<Base>();
    switch(exp.getKind()) {
        case Name:
            if (atEntry && exp.getName().equals("$this"))
                work.add(context.getThisItem());
            else
                for (Base item : focus) {
                    List<Base> outcome = execute(context, item, exp, atEntry);
                    for (Base base : outcome) if (base != null)
                        work.add(base);
                }
            break;
        case Function:
            List<Base> work2 = evaluateFunction(context, focus, exp);
            work.addAll(work2);
            break;
        case Constant:
            Base b = processConstant(context, exp.getConstant());
            if (b != null)
                work.add(b);
            break;
        case Group:
            work2 = execute(context, focus, exp.getGroup(), atEntry);
            work.addAll(work2);
    }
    if (exp.getInner() != null)
        work = execute(context, work, exp.getInner(), false);
    if (exp.isProximal() && exp.getOperation() != null) {
        ExpressionNode next = exp.getOpNext();
        ExpressionNode last = exp;
        while (next != null) {
            List<Base> work2 = preOperate(work, last.getOperation());
            if (work2 != null)
                work = work2;
            else if (last.getOperation() == Operation.Is || last.getOperation() == Operation.As) {
                work2 = executeTypeName(context, focus, next, false);
                work = operate(work, last.getOperation(), work2);
            } else {
                work2 = execute(context, focus, next, true);
                work = operate(work, last.getOperation(), work2);
            // System.out.println("Result of {'"+last.toString()+" "+last.getOperation().toCode()+" "+next.toString()+"'}: "+focus.toString());
            }
            last = next;
            next = next.getOpNext();
        }
    }
    // System.out.println("Result of {'"+exp.toString()+"'}: "+work.toString());
    return work;
}

Example 7 with PathEngineException

use of org.hl7.fhir.exceptions.PathEngineException in project org.hl7.fhir.core by hapifhir.

the class FHIRPathEngine method parse.

// --- public API -------------------------------------------------------
/**
 * Parse a path for later use using execute
 *
 * @param path
 * @return
 * @throws PathEngineException
 * @throws Exception
 */
public ExpressionNode parse(String path) throws FHIRLexerException {
    FHIRLexer lexer = new FHIRLexer(path);
    if (lexer.done())
        throw lexer.error("Path cannot be empty");
    ExpressionNode result = parseExpression(lexer, true);
    if (!lexer.done())
        throw lexer.error("Premature ExpressionNode termination at unexpected token \"" + lexer.getCurrent() + "\"");
    result.check();
    return result;
}

Example 8 with PathEngineException

use of org.hl7.fhir.exceptions.PathEngineException in project org.hl7.fhir.core by hapifhir.

the class FHIRPathEngine method funcSelect.

private List<Base> funcSelect(ExecutionContext context, List<Base> focus, ExpressionNode exp) throws PathEngineException {
    List<Base> result = new ArrayList<Base>();
    List<Base> pc = new ArrayList<Base>();
    for (Base item : focus) {
        pc.clear();
        pc.add(item);
        result.addAll(execute(changeThis(context, item), pc, exp.getParameters().get(0), true));
    }
    return result;
}

Example 9 with PathEngineException

use of org.hl7.fhir.exceptions.PathEngineException 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 {
    // System.out.println("Evaluate {'"+exp.toString()+"'} on "+focus.toString());
    TypeDetails result = new TypeDetails(null);
    switch(exp.getKind()) {
        case Name:
            if (atEntry && exp.getName().equals("$this"))
                result.update(context.getThisItem());
            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;
}

Example 10 with PathEngineException

use of org.hl7.fhir.exceptions.PathEngineException in project org.hl7.fhir.core by hapifhir.

the class FHIRPathEngine method opLessOrEqual.

private List<Base> opLessOrEqual(List<Base> left, List<Base> right) throws PathEngineException {
    if (left.size() == 1 && right.size() == 1 && left.get(0).isPrimitive() && right.get(0).isPrimitive()) {
        Base l = left.get(0);
        Base r = right.get(0);
        if (l.hasType("string") && r.hasType("string"))
            return makeBoolean(l.primitiveValue().compareTo(r.primitiveValue()) <= 0);
        else if ((l.hasType("integer", "decimal")) && (r.hasType("integer", "decimal")))
            return makeBoolean(new Double(l.primitiveValue()) <= new Double(r.primitiveValue()));
        else if ((l.hasType("date", "dateTime", "instant")) && (r.hasType("date", "dateTime", "instant")))
            return makeBoolean(l.primitiveValue().compareTo(r.primitiveValue()) <= 0);
        else if ((l.hasType("time")) && (r.hasType("time")))
            return makeBoolean(l.primitiveValue().compareTo(r.primitiveValue()) <= 0);
    } else if (left.size() == 1 && right.size() == 1 && left.get(0).fhirType().equals("Quantity") && right.get(0).fhirType().equals("Quantity")) {
        List<Base> lUnits = left.get(0).listChildrenByName("unit");
        String lunit = lUnits.size() == 1 ? lUnits.get(0).primitiveValue() : null;
        List<Base> rUnits = right.get(0).listChildrenByName("unit");
        String runit = rUnits.size() == 1 ? rUnits.get(0).primitiveValue() : null;
        if ((lunit == null && runit == null) || lunit.equals(runit)) {
            return opLessOrEqual(left.get(0).listChildrenByName("value"), right.get(0).listChildrenByName("value"));
        } else {
            throw new PathEngineException("Canonical Comparison isn't done yet");
        }
    }
    return new ArrayList<Base>();
}