Implement a Lazy-Loading Table in a Report (on IBM BPM v7.5)

01

/* This is a synchronous version of "callService()" that we can use in our Lazy-Loading Data Grids. */
tw.coach.callSynchronousService = function (service, params, snapshot) {
    if (snapshot == "" || snapshot == null) {
        snapshot = coachSnapshotContext;
    }
    var url = "/portal/jsp/callService.do?serviceName=" + service + "&snapshotId=" + snapshot;
    return callSynchronousServiceImpl(url, params);
};

/* This is a synchronous version of "callServiceImpl()" that we can use in our Lazy-Loading Data Grids.
   The "false" in "http_request.open()" is what makes it synchronous. */
function callSynchronousServiceImpl(url, params) {
    var parameters = "input=" + encodeURIComponent(params);
    var http_request = null;

    if (window.XMLHttpRequest) { // Mozilla, Safari,...
        http_request = new XMLHttpRequest();
        if (http_request.overrideMimeType) {
            http_request.overrideMimeType('text/xml');
        }
    } else if (window.ActiveXObject) { // IE
        try {
            http_request = new ActiveXObject("Msxml2.XMLHTTP");
        } catch (e) {
            try {
                http_request = new ActiveXObject("Microsoft.XMLHTTP");
            } catch (e) {}
        }
    }
    if (!http_request) {
        alert('Cannot create XMLHTTP instance');
        return false;
    }

    http_request.open('POST', url, false);
    http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
    // The browser just complains about these so I have commented them out...
    // http_request.setRequestHeader("Content-length", parameters.length);
    // http_request.setRequestHeader("Connection", "close");
    http_request.send(parameters);

    var ret = new Object();

    if (http_request.status == 200) {
        var result = http_request.responseXML.getElementsByTagName("output");

        if (window.XMLHttpRequest && window.ActiveXObject) { // necessary for IE7
            http_request.responseXML.load(http_request.responseBody);
            result = http_request.responseXML.getElementsByTagName("output");
        }

        for (var i = 0; i < result.length; i++) {
            var output = result[i];
            var name = output.getAttribute("name");
            ret[name] = parseValues(output.firstChild, ret);
        }
    }
    return ret;
}