Examples with InfixExpression org.jboss.forge.roaster._shade.org.eclipse.jdt.core.dom.InfixExpression used on opensource projects

Example 1 with InfixExpression

use of org.jboss.forge.roaster._shade.org.eclipse.jdt.core.dom.InfixExpression in project camel by apache.

the class CamelJavaParserHelper method getLiteralValue.

public static String getLiteralValue(JavaClassSource clazz, Block block, Expression expression) {
    // unwrap parenthesis
    if (expression instanceof ParenthesizedExpression) {
        expression = ((ParenthesizedExpression) expression).getExpression();
    }
    if (expression instanceof StringLiteral) {
        return ((StringLiteral) expression).getLiteralValue();
    } else if (expression instanceof BooleanLiteral) {
        return "" + ((BooleanLiteral) expression).booleanValue();
    } else if (expression instanceof NumberLiteral) {
        return ((NumberLiteral) expression).getToken();
    }
    // if it a method invocation then add a dummy value assuming the method invocation will return a valid response
    if (expression instanceof MethodInvocation) {
        String name = ((MethodInvocation) expression).getName().getIdentifier();
        return "{{" + name + "}}";
    }
    // source code we have access to
    if (expression instanceof QualifiedName) {
        QualifiedName qn = (QualifiedName) expression;
        String name = qn.getFullyQualifiedName();
        return "{{" + name + "}}";
    }
    if (expression instanceof SimpleName) {
        FieldSource<JavaClassSource> field = getField(clazz, block, (SimpleName) expression);
        if (field != null) {
            // is the field annotated with a Camel endpoint
            if (field.getAnnotations() != null) {
                for (Annotation ann : field.getAnnotations()) {
                    boolean valid = "org.apache.camel.EndpointInject".equals(ann.getQualifiedName()) || "org.apache.camel.cdi.Uri".equals(ann.getQualifiedName());
                    if (valid) {
                        Expression exp = (Expression) ann.getInternal();
                        if (exp instanceof SingleMemberAnnotation) {
                            exp = ((SingleMemberAnnotation) exp).getValue();
                        } else if (exp instanceof NormalAnnotation) {
                            List values = ((NormalAnnotation) exp).values();
                            for (Object value : values) {
                                MemberValuePair pair = (MemberValuePair) value;
                                if ("uri".equals(pair.getName().toString())) {
                                    exp = pair.getValue();
                                    break;
                                }
                            }
                        }
                        if (exp != null) {
                            return getLiteralValue(clazz, block, exp);
                        }
                    }
                }
            }
            // is the field an org.apache.camel.Endpoint type?
            if ("Endpoint".equals(field.getType().getSimpleName())) {
                // then grab the uri from the first argument
                VariableDeclarationFragment vdf = (VariableDeclarationFragment) field.getInternal();
                expression = vdf.getInitializer();
                if (expression instanceof MethodInvocation) {
                    MethodInvocation mi = (MethodInvocation) expression;
                    List args = mi.arguments();
                    if (args != null && args.size() > 0) {
                        // the first argument has the endpoint uri
                        expression = (Expression) args.get(0);
                        return getLiteralValue(clazz, block, expression);
                    }
                }
            } else {
                // no annotations so try its initializer
                VariableDeclarationFragment vdf = (VariableDeclarationFragment) field.getInternal();
                expression = vdf.getInitializer();
                if (expression == null) {
                    // its a field which has no initializer, then add a dummy value assuming the field will be initialized at runtime
                    return "{{" + field.getName() + "}}";
                } else {
                    return getLiteralValue(clazz, block, expression);
                }
            }
        } else {
            // we could not find the field in this class/method, so its maybe from some other super class, so insert a dummy value
            final String fieldName = ((SimpleName) expression).getIdentifier();
            return "{{" + fieldName + "}}";
        }
    } else if (expression instanceof InfixExpression) {
        String answer = null;
        // is it a string that is concat together?
        InfixExpression ie = (InfixExpression) expression;
        if (InfixExpression.Operator.PLUS.equals(ie.getOperator())) {
            String val1 = getLiteralValue(clazz, block, ie.getLeftOperand());
            String val2 = getLiteralValue(clazz, block, ie.getRightOperand());
            // if numeric then we plus the values, otherwise we string concat
            boolean numeric = isNumericOperator(clazz, block, ie.getLeftOperand()) && isNumericOperator(clazz, block, ie.getRightOperand());
            if (numeric) {
                Long num1 = val1 != null ? Long.valueOf(val1) : 0;
                Long num2 = val2 != null ? Long.valueOf(val2) : 0;
                answer = "" + (num1 + num2);
            } else {
                answer = (val1 != null ? val1 : "") + (val2 != null ? val2 : "");
            }
            if (!answer.isEmpty()) {
                // include extended when we concat on 2 or more lines
                List extended = ie.extendedOperands();
                if (extended != null) {
                    for (Object ext : extended) {
                        String val3 = getLiteralValue(clazz, block, (Expression) ext);
                        if (numeric) {
                            Long num3 = val3 != null ? Long.valueOf(val3) : 0;
                            Long num = Long.valueOf(answer);
                            answer = "" + (num + num3);
                        } else {
                            answer += val3 != null ? val3 : "";
                        }
                    }
                }
            }
        }
        return answer;
    }
    return null;
}