public int compare(Object o1, Object o2) {
PropertyDescriptor p1 = (PropertyDescriptor) o1;
PropertyDescriptor p2 = (PropertyDescriptor) o2;
Integer i1 = (Integer) p1.getValue(SORT_ORDER);
Integer i2 = (Integer) p2.getValue(SORT_ORDER);
if (i1 == null && i2 == null) {
return p1.getName().compareTo(p2.getName());
} else if (i1 != null) {
return i1.compareTo(i2);
} else {
return i2.compareTo(i1) * -1;
}
}
@Override
public Class getPropertyType(String name) {
PropertyDescriptor compDescriptor = findDescriptor(name);
if (compDescriptor != null) {
// composite:attribute declaration...
ValueExpression typeVE = (ValueExpression) compDescriptor.getValue("type");
if (typeVE == null) {
return Object.class;
} else {
String className =
(String) typeVE.getValue(FacesContext.getCurrentInstance().getELContext());
if (className != null) {
className = prefix(className);
try {
return ReflectionUtil.forName(className);
} catch (ClassNotFoundException cnfe) {
throw new FacesException(cnfe);
}
} else {
return Object.class;
}
}
} else {
// defer to the default processing which will inspect the
// PropertyDescriptor of the UIComponent type
return super.getPropertyType(name);
}
}
public static void main(String[] args) throws Exception {
BeanInfo i = Introspector.getBeanInfo(C.class, Object.class);
Checker.checkEq("description", i.getBeanDescriptor().getShortDescription(), "CHILD");
PropertyDescriptor[] pds = i.getPropertyDescriptors();
Checker.checkEq("number of properties", pds.length, 1);
PropertyDescriptor p = pds[0];
Checker.checkEq("property description", p.getShortDescription(), "CHILDPROPERTY");
Checker.checkEq("isBound", p.isBound(), childFlag);
Checker.checkEq("isExpert", p.isExpert(), childFlag);
Checker.checkEq("isHidden", p.isHidden(), childFlag);
Checker.checkEq("isPreferred", p.isPreferred(), childFlag);
Checker.checkEq("required", p.getValue("required"), childFlag);
Checker.checkEq("visualUpdate", p.getValue("visualUpdate"), childFlag);
Checker.checkEnumEq(
"enumerationValues",
p.getValue("enumerationValues"),
new Object[] {"BOTTOM", 3, "javax.swing.SwingConstants.BOTTOM"});
}
/*
* see java.beans.FeatureDescriptor#FeatureDescriptor(FeatureDescriptor)
*/
public static void copyNonMethodProperties(PropertyDescriptor source, PropertyDescriptor target)
throws IntrospectionException {
target.setExpert(source.isExpert());
target.setHidden(source.isHidden());
target.setPreferred(source.isPreferred());
target.setName(source.getName());
target.setShortDescription(source.getShortDescription());
target.setDisplayName(source.getDisplayName());
// copy all attributes (emulating behavior of private FeatureDescriptor#addTable)
Enumeration<String> keys = source.attributeNames();
while (keys.hasMoreElements()) {
String key = keys.nextElement();
target.setValue(key, source.getValue(key));
}
// see java.beans.PropertyDescriptor#PropertyDescriptor(PropertyDescriptor)
target.setPropertyEditorClass(source.getPropertyEditorClass());
target.setBound(source.isBound());
target.setConstrained(source.isConstrained());
}
/**
* @see ViewHandler#retargetMethodExpressions(javax.faces.context.FacesContext,
* javax.faces.component.UIComponent)
*/
@Override
public void retargetMethodExpressions(FacesContext context, UIComponent topLevelComponent) {
BeanInfo componentBeanInfo =
(BeanInfo) topLevelComponent.getAttributes().get(UIComponent.BEANINFO_KEY);
// PENDING(edburns): log error message if componentBeanInfo is null;
if (null == componentBeanInfo) {
return;
}
PropertyDescriptor attributes[] = componentBeanInfo.getPropertyDescriptors();
String targets = null, attrName = null, strValue = null, methodSignature = null;
UIComponent target = null;
ExpressionFactory expressionFactory = null;
ValueExpression valueExpression = null;
MethodExpression toApply = null;
Class expectedReturnType = null;
Class expectedParameters[] = null;
for (PropertyDescriptor cur : attributes) {
// If the current attribute represents a ValueExpression
if (null != (valueExpression = (ValueExpression) cur.getValue("type"))) {
// take no action on this attribute.
continue;
}
// If the current attribute representes a MethodExpression
if (null != (valueExpression = (ValueExpression) cur.getValue("method-signature"))) {
methodSignature = (String) valueExpression.getValue(context.getELContext());
if (null != methodSignature) {
// This is the name of the attribute on the top level component,
// and on the inner component.
if (null != (valueExpression = (ValueExpression) cur.getValue("targets"))) {
targets = (String) valueExpression.getValue(context.getELContext());
}
if (null == targets) {
targets = cur.getName();
}
if (null == targets || 0 == targets.length()) {
// PENDING error message in page?
logger.severe("Unable to retarget MethodExpression: " + methodSignature);
continue;
}
String[] targetIds = targets.split(" ");
for (String curTarget : targetIds) {
attrName = cur.getName();
// Find the attribute on the top level component
valueExpression = (ValueExpression) topLevelComponent.getAttributes().get(attrName);
if (null == valueExpression) {
// PENDING error message in page?
logger.severe(
"Unable to find attribute with name \""
+ attrName
+ "\" in top level component in consuming page. "
+ "Page author error.");
continue;
}
// lazily initialize this local variable
if (null == expressionFactory) {
expressionFactory = context.getApplication().getExpressionFactory();
}
// If the attribute is one of the pre-defined
// MethodExpression attributes
boolean isAction = false,
isActionListener = false,
isValidator = false,
isValueChangeListener = false;
if ((isAction = attrName.equals("action"))
|| (isActionListener = attrName.equals("actionListener"))
|| (isValidator = attrName.equals("validator"))
|| (isValueChangeListener = attrName.equals("valueChangeListener"))) {
// This is the inner component to which the attribute should
// be applied
target = topLevelComponent.findComponent(curTarget);
if (null == targets) {
// PENDING error message in page?
logger.severe(
"Unable to retarget MethodExpression. "
+ "Unable to find inner component with id "
+ targets
+ ".");
continue;
}
if (isAction) {
expectedReturnType = Object.class;
expectedParameters = new Class[] {};
toApply =
expressionFactory.createMethodExpression(
context.getELContext(),
valueExpression.getExpressionString(),
expectedReturnType,
expectedParameters);
((ActionSource2) target).setActionExpression(toApply);
} else if (isActionListener) {
expectedReturnType = Void.TYPE;
expectedParameters = new Class[] {ActionEvent.class};
toApply =
expressionFactory.createMethodExpression(
context.getELContext(),
valueExpression.getExpressionString(),
expectedReturnType,
expectedParameters);
((ActionSource2) target)
.addActionListener(new MethodExpressionActionListener(toApply));
} else if (isValidator) {
expectedReturnType = Void.TYPE;
expectedParameters =
new Class[] {FacesContext.class, UIComponent.class, Object.class};
toApply =
expressionFactory.createMethodExpression(
context.getELContext(),
valueExpression.getExpressionString(),
expectedReturnType,
expectedParameters);
((EditableValueHolder) target).addValidator(new MethodExpressionValidator(toApply));
} else if (isValueChangeListener) {
expectedReturnType = Void.TYPE;
expectedParameters = new Class[] {ValueChangeEvent.class};
toApply =
expressionFactory.createMethodExpression(
context.getELContext(),
valueExpression.getExpressionString(),
expectedReturnType,
expectedParameters);
((EditableValueHolder) target)
.addValueChangeListener(new MethodExpressionValueChangeListener(toApply));
}
} else {
// There is no explicit methodExpression property on
// an inner component to which this MethodExpression
// should be retargeted. In this case, replace the
// ValueExpression with a method expresson.
// Pull apart the methodSignature to derive the
// expectedReturnType and expectedParameters
// PENDING(rlubke,jimdriscoll) bulletproof this
assert (null != methodSignature);
methodSignature = methodSignature.trim();
// Get expectedReturnType
int j, i = methodSignature.indexOf(" ");
if (-1 != i) {
strValue = methodSignature.substring(0, i);
try {
expectedReturnType = Util.getTypeFromString(strValue);
} catch (ClassNotFoundException cnfe) {
logger.log(
Level.SEVERE,
"Unable to determine expected return type for " + methodSignature,
cnfe);
continue;
}
} else {
logger.severe("Unable to determine expected return type for " + methodSignature);
continue;
}
// derive the arguments
i = methodSignature.indexOf("(");
if (-1 != i) {
j = methodSignature.indexOf(")", i + 1);
if (-1 != j) {
strValue = methodSignature.substring(i + 1, j);
if (0 < strValue.length()) {
String[] params = strValue.split(",");
expectedParameters = new Class[params.length];
boolean exceptionThrown = false;
for (i = 0; i < params.length; i++) {
try {
expectedParameters[i] = Util.getTypeFromString(params[i]);
} catch (ClassNotFoundException cnfe) {
logger.log(
Level.SEVERE,
"Unable to determine expected return type for " + methodSignature,
cnfe);
exceptionThrown = true;
break;
}
}
if (exceptionThrown) {
continue;
}
} else {
expectedParameters = new Class[] {};
}
}
}
assert (null != expectedReturnType);
assert (null != expectedParameters);
toApply =
expressionFactory.createMethodExpression(
context.getELContext(),
valueExpression.getExpressionString(),
expectedReturnType,
expectedParameters);
topLevelComponent.getAttributes().put(attrName, toApply);
}
}
}
}
}
}
