private Expression parseFunction()

in oak-core/src/main/java/org/apache/jackrabbit/oak/query/xpath/XPathToSQL2Converter.java [734:843]
106 lines of code
21 McCabe index (conditional complexity)

    private Expression parseFunction(String functionName) throws ParseException {
        if ("jcr:like".equals(functionName)) {
            Expression.Condition c = new Expression.Condition(parseExpression(),
                    "like", null, Expression.PRECEDENCE_CONDITION);
            read(",");
            c.right = parseExpression();
            read(")");
            return c;
        } else if ("jcr:contains".equals(functionName)) {
            Expression left = parseExpression();
            read(",");
            Expression right = parseExpression();
            read(")");
            Expression.Contains f = new Expression.Contains(left, right);
            return f;
        } else if ("jcr:score".equals(functionName)) {
            Expression.Function f = new Expression.Function("score");
            f.params.add(new Expression.SelectorExpr(currentSelector));
            read(")");
            return f;
        } else if ("xs:dateTime".equals(functionName)) {
            Expression expr = parseExpression();
            Expression.Cast c = new Expression.Cast(expr, "date");
            read(")");
            return c;
        } else if ("fn:coalesce".equals(functionName)) {
            Expression.Function f = new Expression.Function("coalesce");
            f.params.add(parseExpression());
            read(",");
            f.params.add(parseExpression());
            read(")");
            return f;
        } else if ("jcr:first".equals(functionName)) {
            Expression.Function f = new Expression.Function("first");
            f.params.add(parseExpression());
            read(")");
            return f;
        } else if ("fn:lower-case".equals(functionName)) {
            Expression.Function f = new Expression.Function("lower");
            f.params.add(parseExpression());
            read(")");
            return f;
        } else if ("fn:upper-case".equals(functionName)) {
            Expression.Function f = new Expression.Function("upper");
            f.params.add(parseExpression());
            read(")");
            return f;
        } else if ("fn:string-length".equals(functionName)) {
            Expression.Function f = new Expression.Function("length");
            f.params.add(parseExpression());
            read(")");
            return f;
        } else if ("fn:name".equals(functionName)) {
            Expression.Function f = new Expression.Function("name");
            if (!readIf(")")) {
                // only name(.) and name() are currently supported
                read(".");
                read(")");
            }
            f.params.add(new Expression.SelectorExpr(currentSelector));
            return f;
        } else if ("fn:path".equals(functionName)) {
            Expression.Function f = new Expression.Function("path");
            if (!readIf(")")) {
                // only path(.) and path() are currently supported
                read(".");
                read(")");
            }
            f.params.add(new Expression.SelectorExpr(currentSelector));
            return f;
        } else if ("fn:local-name".equals(functionName)) {
            Expression.Function f = new Expression.Function("localname");
            if (!readIf(")")) {
                // only localname(.) and localname() are currently supported
                read(".");
                read(")");
            }
            f.params.add(new Expression.SelectorExpr(currentSelector));
            return f;
        } else if ("jcr:deref".equals(functionName)) {
             // TODO maybe support jcr:deref
             throw getSyntaxError("jcr:deref is not supported");
        } else if ("rep:native".equals(functionName)) {
            String selectorName = currentSelector.name;
            Expression language = parseExpression();
            read(",");
            Expression expr = parseExpression();
            read(")");
            Expression.NativeFunction f = new Expression.NativeFunction(selectorName, language, expr);
            return f;
        } else if ("rep:similar".equals(functionName)) {
            Expression property = parseExpression();
            read(",");
            Expression path = parseExpression();
            read(")");
            Expression.Similar f = new Expression.Similar(property, path);
            return f;
        } else if ("rep:spellcheck".equals(functionName)) {
            Expression term = parseExpression();
            read(")");
            return new Expression.Spellcheck(term);
        } else if ("rep:suggest".equals(functionName)) {
            Expression term = parseExpression();
            read(")");
            return new Expression.Suggest(term);
        } else {
            throw getSyntaxError("jcr:like | jcr:contains | jcr:score | xs:dateTime | " +
                    "fn:lower-case | fn:upper-case | jcr:first | fn:name | fn:local-name | fn:path | rep:similar | rep:spellcheck | rep:suggest");
        }
    }