Examples of org.antlr.stringtemplate.AutoIndentWriter

org.antlr.stringtemplate.AutoIndentWriter
Essentially a char filter that knows how to auto-indent output by maintaining a stack of indent levels. I set a flag upon newline and then next nonwhitespace char resets flag and spits out indention. The indent stack is a stack of strings so we can repeat original indent not just the same number of columns (don't have to worry about tabs vs spaces then). Anchors are char positions (tabs won't work) that indicate where all future wraps should justify to. The wrap position is actually the larger of either the last anchor or the indentation level. This is a filter on a Writer. \n is the proper way to say newline for options and templates. Templates can mix them but use \n for sure and options like wrap="\n". ST will generate the right thing. Override the default (locale) newline by passing in a string to the constructor.

    
    public static void compileEnumBlockTo(Writer writer, 
            ProtoModule module, EnumGroup eg, 
            StringTemplate enumBlockTemplate) throws IOException
    {
        AutoIndentWriter out = new AutoIndentWriter(writer);
        
        StringTemplate enumBlock = enumBlockTemplate.getInstanceOf();
        enumBlock.setAttribute("eg", eg);
        enumBlock.setAttribute("module", module);
        enumBlock.setAttribute("options", module.getOptions());

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    public static void compileMessageBlockTo(Writer writer, 
            ProtoModule module, Message message, 
            StringTemplate messageBlockTemplate) throws IOException
    {
        AutoIndentWriter out = new AutoIndentWriter(writer);
        
        StringTemplate messageBlock = messageBlockTemplate.getInstanceOf();
        messageBlock.setAttribute("message", message);
        messageBlock.setAttribute("module", module);
        messageBlock.setAttribute("options", module.getOptions());

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            fileName = resolveFileName(name);
        }
        
        Writer writer = CompilerUtil.newWriter(module, packageName, fileName);
        
        AutoIndentWriter out = new AutoIndentWriter(writer);
        
        StringTemplate protoBlock = protoBlockTemplate.getInstanceOf();
        protoBlock.setAttribute("proto", proto);
        protoBlock.setAttribute("module", module);
        protoBlock.setAttribute("options", module.getOptions());

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        // getResourceAsInputStream also considers the content cache
        String text = exchange.getContext().getTypeConverter().mandatoryConvertTo(String.class, getResourceAsInputStream());
        StringTemplate template = new StringTemplate(text);
        template.setAttributes(variableMap);
        log.debug("StringTemplate is writing using attributes: {}", variableMap);
        template.write(new AutoIndentWriter(buffer));


        // now lets output the results to the exchange
        Message out = exchange.getOut();
        out.setBody(buffer.toString());
        out.setHeader(StringTemplateConstants.STRINGTEMPLATE_RESOURCE, getResource());

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        // getResourceAsInputStream also considers the content cache
        String text = exchange.getContext().getTypeConverter().mandatoryConvertTo(String.class, getResourceAsInputStream());
        StringTemplate template = new StringTemplate(text);
        template.setAttributes(variableMap);
        log.debug("StringTemplate is writing using attributes: {}", variableMap);
        template.write(new AutoIndentWriter(buffer));


        // now lets output the results to the exchange
        Message out = exchange.getOut();
        out.setBody(buffer.toString());
        out.setHeader(StringTemplateConstants.STRINGTEMPLATE_RESOURCE_URI, getResourceUri());

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        StringTemplate template = new StringTemplate(text);
        template.setAttributes(variableMap);
        if (log.isDebugEnabled()) {
            log.debug("StringTemplate is writing using attributes: " + variableMap);
        }
        template.write(new AutoIndentWriter(buffer));


        // now lets output the results to the exchange
        Message out = exchange.getOut();
        out.setBody(buffer.toString());
        out.setHeaders(exchange.getIn().getHeaders());

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            for(EnumGroup eg : proto.getEnumGroups())
            {
                String fileName = eg.getName() + fileExtension;
                
                Writer writer = CompilerUtil.newWriter(module, packageName, fileName);
                AutoIndentWriter out = new AutoIndentWriter(writer);
                
                StringTemplate enumBlock = group.getInstanceOf("enum_block");
                enumBlock.setAttribute("eg", eg);
                enumBlock.setAttribute("module", module);
                enumBlock.setAttribute("options", module.getOptions());


                enumBlock.write(out);
                writer.close();
            }
        }


        if(hasMessageBlock)
        {
            for(Message m : proto.getMessages())
            {
                String fileName = m.getName() + fileExtension;
                
                Writer writer = CompilerUtil.newWriter(module, packageName, fileName);
                AutoIndentWriter out = new AutoIndentWriter(writer);
                
                StringTemplate messageBlock = group.getInstanceOf("message_block");
                messageBlock.setAttribute("message", m);
                messageBlock.setAttribute("module", module);
                messageBlock.setAttribute("options", module.getOptions());

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        String fileName = name + fileExtension;
        
        Writer writer = CompilerUtil.newWriter(module, packageName, fileName);
        
        AutoIndentWriter out = new AutoIndentWriter(writer);
        StringTemplate protoOuterBlock = group.getInstanceOf("proto_block");
        
        protoOuterBlock.setAttribute("proto", proto);
        protoOuterBlock.setAttribute("module", module);
        protoOuterBlock.setAttribute("options", module.getOptions());

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        StringTemplate template = new StringTemplate(text);
        template.setAttributes(variableMap);
        if (log.isDebugEnabled()) {
            log.debug("StringTemplate is writing using attributes: " + variableMap);
        }
        template.write(new AutoIndentWriter(buffer));


        // now lets output the results to the exchange
        Message out = exchange.getOut(true);
        out.setBody(buffer.toString());
        out.setHeader(StringTemplateConstants.STRINGTEMPLATE_RESOURCE, getResource());

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            for(EnumGroup eg : proto.getEnumGroups())
            {
                String fileName = eg.getName() + fileExtension;
                
                Writer writer = CompilerUtil.newWriter(module, packageName, fileName);
                AutoIndentWriter out = new AutoIndentWriter(writer);
                
                StringTemplate enumBlock = group.getInstanceOf("enum_block");
                enumBlock.setAttribute("eg", eg);
                enumBlock.setAttribute("module", module);
                enumBlock.setAttribute("options", module.getOptions());


                enumBlock.write(out);
                writer.close();
            }
        }


        if(hasMessageBlock)
        {
            for(Message m : proto.getMessages())
            {
                String fileName = m.getName() + fileExtension;
                
                Writer writer = CompilerUtil.newWriter(module, packageName, fileName);
                AutoIndentWriter out = new AutoIndentWriter(writer);
                
                StringTemplate messageBlock = group.getInstanceOf("message_block");
                messageBlock.setAttribute("message", m);
                messageBlock.setAttribute("module", module);
                messageBlock.setAttribute("options", module.getOptions());

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