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


    private void writeJSON(final PrintWriter pw) throws IOException {
        final Set<Group> groups = groupManager.listAllGroups();
        final Set<Node> nodes = clusterManager.listNodes();


        final JSONWriter jw = new JSONWriter(pw);


        try {
            jw.object();
            jw.key("status");
            jw.value(getStatusLine(groups, nodes));
            jw.key("groups");
            jw.array();
            for (Group g : groups) {
                jw.object();
                jw.key("name");
                jw.value(g.getName());


                Set<Node> members = g.getMembers();
                jw.key("members");
                jw.array();
                if (nodes != null) {
                    for (Node n : members) {
                        jw.object();
                        jw.key("id");
                        jw.value(n.getId());
                        jw.endObject();
                    }
                }


                jw.endArray();
                jw.key("actions");
                jw.array();
                boolean enable = true;
                action(jw, enable, "removeNode", "Remove Node", "update");
                action(jw, enable, "deleteGroup", "Delete Group", "delete");
                jw.endArray();
                jw.endObject();
            }
            jw.endArray();
            jw.endObject();
        } catch (JSONException je) {
            throw new IOException(je.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() );

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    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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        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) {
                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 writeJSON(final PrintWriter pw) throws IOException {
        final List<Repository> repositories = this.getRepositories();
        final List<ExtendedFeature> features = this.getFeatures(repositories);
        final String statusLine = this.getStatusLine(features);


        final JSONWriter jw = new JSONWriter(pw);


        try {
            jw.object();


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


            jw.key("repositories");
            jw.array();
            for (Repository r : repositories) {
                jw.object();
                jw.key("name");
                jw.value(r.getName());
                jw.key("url");
                String uri = r.getURI().toString();
                jw.value(uri);
                jw.key("actions");
                jw.array();
                boolean enable = true;
                if (uri.startsWith("bundle")) {
                    enable = false;
                }
                action(jw, enable, "refreshRepository", "Refresh", "refresh");
                action(jw, enable, "removeRepository", "Remove", "delete");
                jw.endArray();
                jw.endObject();
            }
            jw.endArray();


            jw.key("features");
            jw.array();
            for (ExtendedFeature f : features) {
                featureInfo(jw, f);
            }
            jw.endArray();


            jw.endObject();


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

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    {
        final List<Repository> repositories = this.getRepositories();
        final List<ExtendedFeature> features = this.getFeatures( repositories );
        final String statusLine = this.getStatusLine( features );


        final JSONWriter jw = new JSONWriter( pw );


        try
        {
            jw.object();


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


            jw.key( "repositories" );
            jw.array();
            for ( Repository r : repositories )
            {
                jw.object();
                jw.key( "name" );
                jw.value( r.getName() );
                jw.key( "url" );
                String uri = r.getURI().toString();
                jw.value( uri );
                jw.key( "actions" );
                jw.array();
                boolean enable = true;
                if ( uri.startsWith( "bundle" ) ) {
                    enable = false;
                }
                action( jw, enable, "refreshRepository", "Refresh", "refresh" );
                action( jw, enable, "removeRepository", "Remove", "delete" );
                jw.endArray();
                jw.endObject();
            }
            jw.endArray();


            jw.key( "features" );
            jw.array();
            for ( ExtendedFeature f : features )
            {
                featureInfo( jw, f );
            }
            jw.endArray();


            jw.endObject();


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

View Full Code Here

        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);
        }

View Full Code Here

        
        try {
            Project project = getProject(pm, pid);


            Writer w = response.getWriter();
            JSONWriter writer = new JSONWriter(w);
            writer.object();
                writer.key("data"); writer.value(project.data.toString());
                writer.key("transformations"); 
                writer.array();
                    for (Text s : project.transformations) {
                        writer.value(s.toString());
                    }
                writer.endArray();
            writer.endObject();
            w.flush();
            w.close();
        } finally {
            pm.close();
        }

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        try {
            Project project = getProject(pm, pid);


            Writer w = response.getWriter();
            JSONWriter writer = new JSONWriter(w);
            writer.object();
            writer.key("transformations"); 
            writer.array();
                int size = project.transformations.size();
                for (int i = tindex; i < size; i++) {
                    writer.value(project.transformations.get(i).toString());
                }
            writer.endArray();
            writer.endObject();
            w.flush();
            w.close();
        } finally {
            pm.close();
        }

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    @Override
    protected void openProject(HttpServletResponse response, String pid) throws Exception {
        Project project = getProject(pid);


        Writer w = response.getWriter();
        JSONWriter writer = new JSONWriter(w);
        writer.object();
            writer.key("status"); writer.value("ok");
            writer.key("data"); writer.value(project.data);
            writer.key("metadata"); writer.value(new JSONObject(project.metadata));
            writer.key("transformations"); 
            writer.array();
                for (String s : project.transformations) {
                    writer.value(new JSONObject(s));
                }
            writer.endArray();
        writer.endObject();
        w.flush();
        w.close();
    }

View Full Code Here

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