Examples with IDelegateCommandHandler org.eclipse.jdt.ls.core.internal.IDelegateCommandHandler used on opensource projects

Example 1 with IDelegateCommandHandler

use of org.eclipse.jdt.ls.core.internal.IDelegateCommandHandler in project eclipse.jdt.ls by eclipse.

the class WorkspaceExecuteCommandHandler method executeCommand.

/**
 * Execute workspace command and invoke language server delegate command
 * handler for matching command
 *
 * @param params
 *            parameter from the protocol
 * @param monitor
 * @return execution result
 */
public Object executeCommand(ExecuteCommandParams params, IProgressMonitor monitor) {
    if (params == null || params.getCommand() == null) {
        String errorMessage = "The workspace/executeCommand has empty params or command";
        JavaLanguageServerPlugin.logError(errorMessage);
        throw new ResponseErrorException(new ResponseError(ResponseErrorCode.InvalidParams, errorMessage, null));
    }
    Set<DelegateCommandHandlerDescriptor> handlers = getDelegateCommandHandlerDescriptors();
    // no cancellation here but it's super fast so it's ok.
    Collection<DelegateCommandHandlerDescriptor> candidates = handlers.stream().filter(desc -> desc.getCommands().contains(params.getCommand())).collect(Collectors.toSet());
    if (candidates.size() > 1) {
        Exception ex = new IllegalStateException(String.format("Found multiple delegateCommandHandlers (%s) matching command %s", candidates, params.getCommand()));
        throw new ResponseErrorException(new ResponseError(ResponseErrorCode.InternalError, ex.getMessage(), ex));
    }
    if (monitor.isCanceled()) {
        return "";
    }
    if (candidates.isEmpty()) {
        throw new ResponseErrorException(new ResponseError(ResponseErrorCode.MethodNotFound, String.format("No delegateCommandHandler for %s", params.getCommand()), null));
    }
    final Object[] resultValues = new Object[1];
    SafeRunner.run(new ISafeRunnable() {

        @Override
        public void run() throws Exception {
            final IDelegateCommandHandler delegateCommandHandler = candidates.iterator().next().getDelegateCommandHandler();
            if (delegateCommandHandler != null) {
                // Convert args to java objects before sending to extensions
                List<Object> args = Collections.emptyList();
                if (params.getArguments() != null) {
                    args = params.getArguments().stream().map((element) -> {
                        return JSONUtility.toModel(element, Object.class);
                    }).collect(Collectors.toList());
                }
                resultValues[0] = delegateCommandHandler.executeCommand(params.getCommand(), args, monitor);
            }
        }

        @Override
        public void handleException(Throwable ex) {
            IStatus status = new Status(IStatus.ERROR, JavaLanguageServerPlugin.PLUGIN_ID, IStatus.OK, "Error in calling delegate command handler", ex);
            JavaLanguageServerPlugin.log(status);
            if (ex instanceof ResponseErrorException) {
                throw (ResponseErrorException) ex;
            }
            throw new ResponseErrorException(new ResponseError(ResponseErrorCode.UnknownErrorCode, ex.getMessage(), ex));
        }
    });
    return resultValues[0];
}