activemq-protobuf/src/main/java/org/apache/activemq/protobuf/compiler/AltJavaGenerator.java [612:641]:
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    private void generateMethodType(MessageDescriptor m, String className) {
        String typeEnum = getOption(m.getOptions(), "java_type_method", null);        
        if( typeEnum!=null ) {
            
            TypeDescriptor typeDescriptor = m.getType(typeEnum);
            if( typeDescriptor == null ) {
                typeDescriptor = m.getProtoDescriptor().getType(typeEnum);
            }
            if( typeDescriptor == null || !typeDescriptor.isEnum() ) {
                errors.add("The java_type_method option on the "+m.getName()+" message does not point to valid enum type");
                return;
            }
            
            
            String constant = constantCase(className);
            EnumDescriptor enumDescriptor = (EnumDescriptor)typeDescriptor;
            if( enumDescriptor.getFields().get(constant) == null ) {
                errors.add("The java_type_method option on the "+m.getName()+" message does not points to the "+typeEnum+" enum but it does not have an entry for "+constant);
            }
            
            String type = javaType(typeDescriptor);
            
            p("public "+type+" type() {");
            indent();
                p("return "+type+"."+constant+";");
            unindent();
            p("}");
            p();
        }
    }
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activemq-protobuf/src/main/java/org/apache/activemq/protobuf/compiler/JavaGenerator.java [399:428]:
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    private void generateMethodType(MessageDescriptor m, String className) {
        String typeEnum = getOption(m.getOptions(), "java_type_method", null);        
        if( typeEnum!=null ) {
            
            TypeDescriptor typeDescriptor = m.getType(typeEnum);
            if( typeDescriptor == null ) {
                typeDescriptor = m.getProtoDescriptor().getType(typeEnum);
            }
            if( typeDescriptor == null || !typeDescriptor.isEnum() ) {
                errors.add("The java_type_method option on the "+m.getName()+" message does not point to valid enum type");
                return;
            }
            
            
            String constant = constantCase(className);
            EnumDescriptor enumDescriptor = (EnumDescriptor)typeDescriptor;
            if( enumDescriptor.getFields().get(constant) == null ) {
                errors.add("The java_type_method option on the "+m.getName()+" message does not points to the "+typeEnum+" enum but it does not have an entry for "+constant);
            }
            
            String type = javaType(typeDescriptor);
            
            p("public "+type+" type() {");
            indent();
                p("return "+type+"."+constant+";");
            unindent();
            p("}");
            p();
        }
    }
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