public class ScriptParam extends OnloadParam
The <o:scriptParam> is a component that extends the standard <f:viewParam>
with support for setting results of client-side evaluated JavaScript code in bean.
It's similar to the <f:viewParam>.
<f:metadata>
<o:scriptParam script="new Date().getTimezoneOffset()" value="#{bean.clientTimeZoneOffset}" />
<o:scriptParam script="window.screen.width" value="#{bean.clientScreenWidth}" />
<o:scriptParam script="someFunctionName()" value="#{bean.resultOfSomeFunctionName}" />
</f:metadata>
You can use the render attribute to declare which components should be updated when a script parameter
has been set.
<f:metadata>
<o:scriptParam script="foo()" value="#{bean.resultOfFoo}" render="fooResult" />
</f:metadata>
...
<h:body>
...
<h:panelGroup id="fooResult">
<ui:fragment rendered="#{not empty bean.resultOfFoo}">
The result of foo() script is: #{bean.resultOfFoo}
</ui:fragment>
</h:panelGroup>
...
</h:body>
Note that as it extends from the standard <f:viewParam>, its built-in conversion and validation
functionality is also supported on this component. So, the following is also possible:
<f:metadata>
<o:scriptParam script="window.navigator" value="#{bean.clientNavigator}" />
</f:metadata>
With a clientNavigator being an instance of javax.json.JsonObject:
private JsonObject clientNavigator;And this converter:
package com.example;
import java.io.StringReader;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.convert.Converter;
import javax.faces.convert.ConverterException;
import javax.faces.convert.FacesConverter;
import javax.json.Json;
import javax.json.JsonObject;
@FacesConverter(forClass = JsonObject.class)
public class JsobObjectConverter implements Converter<JsonObject> {
@Override
public String getAsString(FacesContext context, UIComponent component, JsonObject modelValue) {
if (modelValue == null) {
return "";
}
return modelValue.toString();
}
@Override
public JsonObject getAsObject(FacesContext context, UIComponent component, String submittedValue) {
if (submittedValue == null || submittedValue.isEmpty()) {
return null;
}
try {
return Json.createReader(new StringReader(submittedValue)).readObject();
}
catch (Exception e) {
throw new ConverterException("Not a valid JSON object", e);
}
}
}
When the script params have been set, then any method with the PostScriptParam annotation will be fired:
@PostScriptParam
public void initScriptParams() {
// ...
}
This is useful in case you want to preload the model for whatever is rendered by
<o:scriptParam render>.
OnloadParam,
PostScriptParam,
Faces.getScriptParameters()UIViewParameter.Reference| Modifier and Type | Field and Description |
|---|---|
static String |
COMPONENT_TYPE
The component type, which is "org.omnifaces.component.input.ScriptParam".
|
static String |
EVENT_VALUE
The omnifaces event value, which is "setScriptParamValues".
|
stateCOMPONENT_FAMILYALWAYS_PERFORM_VALIDATION_WHEN_REQUIRED_IS_TRUE, CONVERSION_MESSAGE_ID, EMPTY_STRING_AS_NULL_PARAM_NAME, REQUIRED_MESSAGE_ID, UPDATE_MESSAGE_ID, VALIDATE_EMPTY_FIELDS_PARAM_NAMEATTRS_WITH_DECLARED_DEFAULT_VALUES, BEANINFO_KEY, bindings, COMPOSITE_COMPONENT_TYPE_KEY, COMPOSITE_FACET_NAME, CURRENT_COMPONENT, CURRENT_COMPOSITE_COMPONENT, FACETS_KEY, HONOR_CURRENT_COMPONENT_ATTRIBUTES_PARAM_NAME, VIEW_LOCATION_KEY| Constructor and Description |
|---|
ScriptParam() |
| Modifier and Type | Method and Description |
|---|---|
protected void |
decodeAll(FacesContext context)
Decode all relevant
OnloadParam components at once. |
protected String |
getEventValue(FacesContext context)
Returns the value of the
OmniFaces.OMNIFACES_EVENT_PARAM_NAME associated with the current component. |
protected String |
getInitScript(FacesContext context)
Returns script which should be executed upon initialization of a new view.
|
String |
getScript()
Returns the script to be evaluated.
|
static boolean |
isScriptParamRequest(FacesContext context)
Returns
true if the current request is triggered by a script param request. |
void |
setScript(String script)
Sets the script to be evaluated.
|
decodeImmediately, getRender, getUpdateScript, isOnloadParamRequest, isOnloadParamRequest, processDecodes, processUpdates, processValidators, setRenderdecode, encodeAll, getConvertedValue, getFamily, getName, getStringValue, getStringValueFromModel, getSubmittedValue, isImmediate, setName, setSubmittedValue, updateModeladdValidator, addValueChangeListener, clearInitialState, compareValues, getConverterMessage, getRequiredMessage, getValidator, getValidatorMessage, getValidators, getValue, getValueChangeListener, getValueChangeListeners, isEmpty, isLocalValueSet, isRequired, isValid, markInitialState, removeValidator, removeValueChangeListener, resetValue, restoreState, saveState, setConverterMessage, setImmediate, setLocalValueSet, setRequired, setRequiredMessage, setValid, setValidator, setValidatorMessage, setValue, setValueChangeListener, validate, validateValuegetConverter, getLocalValue, setConverteraddClientBehavior, addFacesListener, broadcast, encodeBegin, encodeChildren, encodeEnd, findComponent, getAttributes, getChildCount, getChildren, getClientBehaviors, getClientId, getDefaultEventName, getEventNames, getFacesContext, getFacesListeners, getFacet, getFacetCount, getFacets, getFacetsAndChildren, getId, getListenersForEventClass, getParent, getPassThroughAttributes, getRenderer, getRendererType, getRendersChildren, getValueBinding, invokeOnComponent, isRendered, isTransient, processRestoreState, processSaveState, queueEvent, removeFacesListener, restoreAttachedState, saveAttachedState, setId, setParent, setRendered, setRendererType, setTransient, setValueBinding, subscribeToEvent, unsubscribeFromEventgetClientId, getCompositeComponentParent, getContainerClientId, getCurrentComponent, getCurrentCompositeComponent, getNamingContainer, getPassThroughAttributes, getResourceBundleMap, getStateHelper, getStateHelper, getTransientStateHelper, getTransientStateHelper, getValueExpression, initialStateMarked, isCompositeComponent, isInView, isVisitable, popComponentFromEL, processEvent, pushComponentToEL, restoreTransientState, saveTransientState, setInView, setValueExpression, visitTreeclone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitgetConverter, getLocalValue, setConverterpublic static final String COMPONENT_TYPE
public static final String EVENT_VALUE
protected String getInitScript(FacesContext context)
OnloadParamgetInitScript in class OnloadParamcontext - The involved faces context.protected String getEventValue(FacesContext context)
OnloadParamOmniFaces.OMNIFACES_EVENT_PARAM_NAME associated with the current component.getEventValue in class OnloadParamcontext - The involved faces context.OmniFaces.OMNIFACES_EVENT_PARAM_NAME associated with the current component.protected void decodeAll(FacesContext context)
OnloadParamOnloadParam components at once.decodeAll in class OnloadParamcontext - The involved faces context.public String getScript()
public void setScript(String script)
script - The script to be evaluated.public static boolean isScriptParamRequest(FacesContext context)
true if the current request is triggered by a script param request.
I.e. if it is initiated by OmniFaces.ScriptParam.setScriptParamValues() script which runs on page load.context - The involved faces context.true if the current request is triggered by a script param request.Copyright © 2012–2020 OmniFaces. All rights reserved.