public class XJSONDataSource extends DataSource
"scriptInclude" transport
for cross-domain calls to JSON services, such as those provided by Yahoo!.
To use this DataSource, provide the URL of the service as dataURL, and
provide fields that describe the structure of the data you want to
extract from the service's response.
recordXPath and valueXPath can be used to extract
data from the JSON structure returned by the service. See
Client-Side Data Integration for an overview of how to
control what parts of the JSON structure are included in the DSResponse object, and
hence provided to DataBoundComponents that are bound to this DataSource.
This XJSONDataSource is really a subclass of DataSource with just a few property settings:
dataFormat : "json",
dataTransport : "scriptInclude"
callbackParam : "callback"
If you are also writing the server side code to respond to requests from this DataSource, see the tutorial provided by Yahoo! for a good overview of how this transport mechanism works. Note, as indicated in the tutorial above, the server is responsible for writing out not just the data, but also a JavaScript function call that tells the client that the response has arrived. The client passes the name of the function to call as the "callback" URL parameter.
NOTE: if you use this DataSource to contact Yahoo web services, remember to include output=json in the dataURL, as well as a Yahoo developer ID.
config, id, scClassName| Constructor and Description |
|---|
XJSONDataSource() |
XJSONDataSource(com.google.gwt.core.client.JavaScriptObject jsObj) |
| Modifier and Type | Method and Description |
|---|---|
com.google.gwt.core.client.JavaScriptObject |
create() |
static XJSONDataSource |
getOrCreateRef(com.google.gwt.core.client.JavaScriptObject jsObj) |
void |
setJavaScriptObject(com.google.gwt.core.client.JavaScriptObject jsObj) |
addData, addData, addData, addField, addHandleErrorHandler, applyFilter, applyFilter, combineCriteria, combineCriteria, combineCriteria, compareCriteria, compareCriteria, compareCriteria, compareDates, convertCriteria, convertCriteria, convertRelativeDates, convertRelativeDates, convertRelativeDates, copyCriteria, copyRecord, copyRecords, downloadFile, downloadFile, downloadFile, evaluateCriterion, exportClientData, exportClientDataStatic, exportData, exportData, exportData, exportData, fetchData, fetchData, fetchData, fetchData, fetchRecord, fetchRecord, fetchRecord, fieldMatchesFilter, fieldMatchesFilter, filterData, filterData, filterData, filterData, get, get, getAddGlobalId, getAllowAdvancedCriteria, getAutoCacheAllData, getAutoConvertRelativeDates, getAutoDeriveTitles, getAutoTitle, getCacheAcrossOperationIds, getCacheAllData, getCacheAllOperationId, getCacheData, getCacheMaxAge, getCallbackParam, getCanMultiSort, getChildrenField, getClientOnly, getClientOnlyDataSource, getClientOnlyDataSource, getClientOnlyDataSource, getClientOnlyResponse, getCriteriaPolicy, getDataField, getDataFormat, getDataProtocol, getDataSource, getDataSource, getDataTransport, getDataURL, getDefaultParams, getDescriptionField, getDisplayValue, getDropExtraFields, getDropUnknownCriteria, getFetchDataURL, getFetchDataURL, getField, getFieldAutoTitle, getFieldCriterion, getFieldForDataPath, getFieldNames, getFieldNames, getFieldOperators, getFieldOperators, getFields, getFieldValue, getFieldValue, getFieldValue, getFieldValue, getFileURL, getFileURL, getFileURL, getGlobalNamespaces, getIconField, getInfoField, getInheritsFrom, getJsObj, getJsonPrefix, getJsonSuffix, getLegalChildTags, getOperationBindings, getPluralTitle, getPreventHTTPCaching, getPrimaryKeyField, getPrimaryKeyFieldName, getPrimaryKeyFieldNames, getPrimaryKeyFields, getProgressiveLoading, getQualifyColumnNames, getRecordXPath, getRequestProperties, getRequiredMessage, getResultBatchSize, getResultSetClass, getSchemaNamespace, getSendExtraFields, getSendParentNode, getServiceNamespace, getShowLocalFieldsOnly, getShowPrompt, getSortBy, getSortSpecifiers, getStrictSQLFiltering, getTagName, getTestData, getTitle, getTitleField, getTypeOperators, getUseFlatFields, getUseHttpProxy, getUseLocalValidators, getUseOfflineStorage, getUseParentFieldOrder, getUseStrictJSON, getUseTestDataFetch, getValidateRelatedRecords, hasAllData, invalidateCache, isCreated, load, load, loadWithParents, loadWithParents, onInit, performCustomOperation, performCustomOperation, performCustomOperation, performCustomOperation, processResponse, recordsAsText, recordsAsText, recordsFromText, recordsFromText, recordsFromXML, registerID, removeData, removeData, removeData, setAddGlobalId, setAllowAdvancedCriteria, setAutoCacheAllData, setAutoConvertRelativeDates, setAutoDeriveTitles, setCacheAcrossOperationIds, setCacheAllData, setCacheAllOperationId, setCacheData, setCacheMaxAge, setCallbackParam, setCanMultiSort, setChildrenField, setClientOnly, setCriteriaPolicy, setDataField, setDataFormat, setDataProtocol, setDataTransport, setDataURL, setDefaultParams, setDescriptionField, setDropExtraFields, setDropUnknownCriteria, setEnumConstantProperty, setEnumOrdinalProperty, setEnumTranslateStrategy, setFields, setGlobalNamespaces, setHandleErrorCallback, setIconField, setID, setInfoField, setInheritsFrom, setInheritsFrom, setJsonPrefix, setJsonSuffix, setOperationBindings, setPluralTitle, setPreventHTTPCaching, setProgressiveLoading, setQualifyColumnNames, setRecordName, setRecordXPath, setRequestProperties, setRequiredMessage, setResultBatchSize, setResultSetClass, setSendExtraFields, setSendParentNode, setServiceNamespace, setShowLocalFieldsOnly, setShowPrompt, setStrictSQLFiltering, setTagName, setTestData, setTitle, setTitleField, setTypeOperators, setUseFlatFields, setUseHttpProxy, setUseLocalValidators, setUseOfflineStorage, setUseParentFieldOrder, setUseStrictJSON, setUseTestDataFetch, setValidateRelatedRecords, setXmlNamespaces, splitCriteria, supportsAdvancedCriteria, supportsTextMatchStyle, transformRequest, transformResponse, updateCaches, updateCaches, updateData, updateData, updateData, useOfflineResponse, validateData, validateData, validateData, viewFile, viewFile, viewFile, xmlSerialize, xmlSerialize, xmlSerialize, xmlSerialize, xmlSerializeasSGWTComponent, destroy, doAddHandler, doInit, error, error, errorIfNotCreated, fireEvent, getAttribute, getAttributeAsBoolean, getAttributeAsDate, getAttributeAsDouble, getAttributeAsElement, getAttributeAsFloat, getAttributeAsInt, getAttributeAsJavaScriptObject, getAttributeAsMap, getAttributeAsString, getAttributeAsStringArray, getClassName, getConfig, getHandlerCount, getID, getOrCreateJsObj, getRef, getScClassName, internalSetID, internalSetID, onBind, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setAttribute, setProperty, setProperty, setProperty, setProperty, setScClassNamepublic XJSONDataSource()
public XJSONDataSource(com.google.gwt.core.client.JavaScriptObject jsObj)
public static XJSONDataSource getOrCreateRef(com.google.gwt.core.client.JavaScriptObject jsObj)
public void setJavaScriptObject(com.google.gwt.core.client.JavaScriptObject jsObj)
setJavaScriptObject in class DataSourcepublic com.google.gwt.core.client.JavaScriptObject create()
create in class DataSource