Examples of org.json.JSONWriter

org.json.JSONWriter
JSONWriter provides a quick and convenient way of producing JSON text. The texts produced strictly conform to JSON syntax rules. No whitespace is added, so the results are ready for transmission or storage. Each instance of JSONWriter can produce one JSON text.
A JSONWriter instance provides a value method for appending values to the text, and a key method for adding keys before values in objects. There are array and endArray methods that make and bound array values, and object and endObject methods which make and bound object values. All of these methods return the JSONWriter instance, permitting a cascade style. For example,
```
 new JSONWriter(myWriter).object().key("JSON").value("Hello, World!") .endObject(); 
```
which writes
```
 {"JSON":"Hello, World!"} 
```
The first method called must be array or object. There are no methods for adding commas or colons. JSONWriter adds them for you. Objects and arrays can be nested up to 20 levels deep.
This can sometimes be easier than using a JSONObject to build a string. @author JSON.org @version 2011-11-24

        final PrintWriter pw = response.getWriter();
        writeJSON(pw);
    }


    private void writeJSON(final PrintWriter pw) {
        final JSONWriter jw = new JSONWriter(pw);
        final Instance[] instances = instanceService.getInstances();
        try {
            jw.object();
            jw.key("status");
            jw.value(getStatusLine());
            jw.key("instances");
            jw.array();
            for (Instance i : instances) {
                instanceInfo(jw, i);
            }
            jw.endArray();
            jw.endObject();
        } catch (JSONException ex) {
            Logger.getLogger(InstancePlugin.class.getName()).log(Level.SEVERE, null, ex);
        } catch (Exception ex) {
            Logger.getLogger(InstancePlugin.class.getName()).log(Level.SEVERE, null, ex);
        }

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        final PrintWriter pw = response.getWriter();
        writeJSON(pw);
    }


    private void writeJSON(final PrintWriter pw) {
        final JSONWriter jw = new JSONWriter(pw);
        final Instance[] instances = adminService.getInstances();
        try {
            jw.object();
            jw.key("status");
            jw.value(getStatusLine());
            jw.key("instances");
            jw.array();
            for (Instance i : instances) {
//                if (!i.isRoot()) {
                    instanceInfo(jw, i);
//                }
            }
            jw.endArray();
            jw.endObject();
        } catch (JSONException ex) {
            Logger.getLogger(AdminPlugin.class.getName()).log(Level.SEVERE, null, ex);
        } catch (Exception ex) {
            Logger.getLogger(AdminPlugin.class.getName()).log(Level.SEVERE, null, ex);
        }

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    }


    private void renderResult(final PrintWriter pw, final Component component)
        throws IOException
    {
        final JSONWriter jw = new JSONWriter(pw);
        try
        {
            jw.object();


            final ScrService scrService = getScrService();
            if (scrService == null)
            {
                jw.key("status"); //$NON-NLS-1$
                jw.value(-1);
            }
            else
            {
                final Component[] components = scrService.getComponents();


                if (components == null || components.length == 0)
                {
                    jw.key("status"); //$NON-NLS-1$
                    jw.value(0);
                }
                else
                {
                    // order components by name
                    sortComponents(components);


                    final StringBuffer buffer = new StringBuffer();
                    buffer.append(components.length);
                    buffer.append(" component"); //$NON-NLS-1$
                    if (components.length != 1)
                    {
                        buffer.append('s');
                    }
                    buffer.append(" installed."); //$NON-NLS-1$
                    jw.key("status"); //$NON-NLS-1$
                    jw.value(components.length);


                    // render components
                    jw.key("data"); //$NON-NLS-1$
                    jw.array();
                    if (component != null)
                    {
                        component(jw, component, true);
                    }
                    else
                    {
                        for (int i = 0; i < components.length; i++)
                        {
                            component(jw, components[i], false);
                        }
                    }
                    jw.endArray();
                }
            }


            jw.endObject();
        }
        catch (JSONException je)
        {
            throw new IOException(je.toString());
        }

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    {


        resp.setContentType("application/json"); //$NON-NLS-1$
        resp.setCharacterEncoding("UTF-8"); //$NON-NLS-1$
        final PrintWriter out = resp.getWriter();
        final JSONWriter jw = new JSONWriter(out);
        final String action = req.getParameter("action"); //$NON-NLS-1$


        final String role = req.getParameter("role"); //$NON-NLS-1$
        final String group = req.getParameter("group"); //$NON-NLS-1$

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        final DeploymentAdmin admin = (DeploymentAdmin) adminTracker.getService();


        StringWriter w = new StringWriter();
        PrintWriter w2 = new PrintWriter(w);
        JSONWriter jw = new JSONWriter(w2);
        try
        {
            jw.object();
            if (null == admin)
            {
                jw.key("error"); //$NON-NLS-1$
                jw.value(true);
            }
            else
            {
                final DeploymentPackage[] packages = admin.listDeploymentPackages();
                jw.key("data"); //$NON-NLS-1$


                jw.array();
                for (int i = 0; i < packages.length; i++)
                {
                    packageInfoJson(jw, packages[i]);
                }
                jw.endArray();


            }
            jw.endObject();


        }
        catch (JSONException je)
        {
            throw new IOException(je.toString());

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        final String statusLine = getStatusLine( allServices );


        final ServiceReference[] services = ( service != null ) ? new ServiceReference[]
            { service } : allServices;


        final JSONWriter jw = new JSONWriter( pw );


        try
        {
            jw.object();


            jw.key( "status" );
            jw.value( statusLine );


            jw.key( "serviceCount" );
            jw.value( allServices.length );


            jw.key( "data" );


            jw.array();


            for ( int i = 0; i < services.length; i++ )
            {
                serviceInfo( jw, services[i], fullDetails || service != null, locale );
            }


            jw.endArray();


            jw.endObject();


        }
        catch ( JSONException je )
        {
            throw new IOException( je.toString() );

View Full Code Here

    }


    private String getScriptConfig0() throws JSONException
    {
        StringWriter sw = new StringWriter();
        JSONWriter jw = new JSONWriter(sw);
        jw.array();


        for (ScriptEngineFactory sef : scriptEngineManager.getEngineFactories())
        {
            jw.object();
            if (sef.getExtensions().isEmpty())
            {
                continue;
            }
            jw.key("langName").value(sef.getLanguageName());
            jw.key("langCode").value(sef.getExtensions().get(0));


            //Language mode as per CodeMirror names
            String mode = determineMode(sef.getExtensions());
            if (mode != null)
            {
                jw.key("mode").value(mode);
            }


            jw.endObject();
        }


        jw.endArray();
        return sw.toString();
    }

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            bundles = allBundles;
        }


        Util.sort( bundles, locale );


        final JSONWriter jw = new JSONWriter( pw );


        try
        {
            jw.object();


            if (null != be)
            {
                final StringWriter s = new StringWriter();
                final Throwable t = be.getNestedException() != null ? be.getNestedException() : be;
                t.printStackTrace( new PrintWriter(s) );
                jw.key( "error" );
                jw.value( s.toString() );
            }


            jw.key( "status" );
            jw.value( statusLine );


            // add raw status
            jw.key( "s" );
            jw.array();
            for ( int i = 0; i < 5; i++ ) jw.value(status[i]);
            jw.endArray();


            jw.key( "data" );


            jw.array();


            for ( int i = 0; i < bundles.length; i++ )
            {
                bundleInfo( jw, bundles[i], fullDetails || bundle != null, pluginRoot, servicesRoot, locale );
            }


            jw.endArray();


            jw.endObject();


        }
        catch ( JSONException je )
        {
            throw new IOException( je.toString() );

View Full Code Here


    void printConfigurationJson( PrintWriter pw, String pid, Configuration config, String pidFilter,
        String locale )
    {


        JSONWriter result = new JSONWriter( pw );


        if ( pid != null )
        {
            try
            {
                result.object();
                this.configForm( result, pid, config, pidFilter, locale );
                result.endObject();
            }
            catch ( Exception e )
            {
                configManager.log( "Error reading configuration PID " + pid, e );
            }

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    {
        // create status line
        final LogReaderService logReaderService = ( LogReaderService ) this.getService( LogReaderService.class
            .getName() );


        JSONWriter jw = new JSONWriter( pw );
        try
        {
            jw.object();


            jw.key( "status" ); //$NON-NLS-1$
            jw.value( logReaderService == null ? Boolean.FALSE : Boolean.TRUE );


            jw.key( "data" ); //$NON-NLS-1$
            jw.array();


            if ( logReaderService != null )
            {
                int index = 0;
                for ( Enumeration logEntries = logReaderService.getLog(); logEntries.hasMoreElements()
                    && index < MAX_LOGS; )
                {
                    LogEntry nextLog = ( LogEntry ) logEntries.nextElement();
                    if ( nextLog.getLevel() <= minLogLevel )
                    {
                        logJson( jw, nextLog, index++, traces );
                    }
                }
            }


            jw.endArray();


            jw.endObject();


        }
        catch ( JSONException je )
        {
            throw new IOException( je.toString() );

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