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// HtmlBasicInputRenderer.java
package com.sun.faces.renderkit.html_basic;
import java.util.List;
import java.util.Map;
import java.util.logging.Level;
import javax.el.ValueExpression;
import javax.faces.application.Application;
import javax.faces.component.UIComponent;
import javax.faces.component.UIInput;
import javax.faces.component.ValueHolder;
import javax.faces.component.behavior.ClientBehavior;
import javax.faces.context.FacesContext;
import javax.faces.convert.Converter;
import javax.faces.convert.ConverterException;
import com.sun.faces.util.MessageFactory;
import com.sun.faces.util.MessageUtils;
import com.sun.faces.util.RequestStateManager;
/**
* HtmlBasicInputRenderer is a base class for implementing renderers
* that support UIInput type components
*/
public abstract class HtmlBasicInputRenderer extends HtmlBasicRenderer {
private boolean hasStringConverter = false;
private boolean hasStringConverterSet = false;
// ---------------------------------------------------------- Public Methods
@Override
public Object getConvertedValue(FacesContext context, UIComponent component,
Object submittedValue)
throws ConverterException {
String newValue = (String) submittedValue;
// if we have no local value, try to get the valueExpression.
ValueExpression valueExpression = component.getValueExpression("value");
Converter converter = null;
// If there is a converter attribute, use it to to ask application
// instance for a converter with this identifer.
if (component instanceof ValueHolder) {
converter = ((ValueHolder) component).getConverter();
}
if (null == converter && null != valueExpression) {
Class converterType = valueExpression.getType(context.getELContext());
// if converterType is null, assume the modelType is "String".
if (converterType == null ||
converterType == Object.class) {
if (logger.isLoggable(Level.FINE)) {
logger.log(Level.FINE,
"No conversion necessary for value {0} of component {1}",
new Object[]{
submittedValue,
component.getId() });
}
return newValue;
}
// If the converterType is a String, and we don't have a
// converter-for-class for java.lang.String, assume the type is
// "String".
if (converterType == String.class && !hasStringConverter(context)) {
if (logger.isLoggable(Level.FINE)) {
logger.log(Level.FINE,
"No conversion necessary for value {0} of component {1}",
new Object[]{
submittedValue,
component.getId()});
}
return newValue;
}
// if getType returns a type for which we support a default
// conversion, acquire an appropriate converter instance.
try {
Application application = context.getApplication();
converter = application.createConverter(converterType);
if (logger.isLoggable(Level.FINE)) {
logger.log(Level.FINE,
"Created converter ({0}) for type {1} for component {2}.",
new Object[] {
converter.getClass().getName(),
converterType.getClass().getName(),
component.getId() });
}
} catch (Exception e) {
if (logger.isLoggable(Level.SEVERE)) {
logger.log(Level.SEVERE,
"Could not instantiate converter for type {0}: {1}",
new Object[] {
converterType,
e.toString() });
logger.log(Level.SEVERE, "", e);
}
return (null);
}
} else if (converter == null) {
// if there is no valueExpression and converter attribute set,
// assume the modelType as "String" since we have no way of
// figuring out the type. So for the selectOne and
// selectMany, converter has to be set if there is no
// valueExpression attribute set on the component.
if (logger.isLoggable(Level.FINE)) {
logger.log(Level.FINE,
"No conversion necessary for value {0} of component {1}",
new Object[] {
submittedValue,
component.getId() });
logger.fine(" since there is no explicitly registered converter "
+ "and the component value is not bound to a model property");
}
return newValue;
}
if (converter != null) {
// If the conversion eventually falls to needing to use EL type coercion,
// make sure our special ConverterPropertyEditor knows about this value.
RequestStateManager.set(context,
RequestStateManager.TARGET_COMPONENT_ATTRIBUTE_NAME,
component);
return converter.getAsObject(context, component, newValue);
} else {
// throw converter exception.
Object[] params = {
newValue,
"null Converter"
};
throw new ConverterException(MessageFactory.getMessage(
context, MessageUtils.CONVERSION_ERROR_MESSAGE_ID, params));
}
}
@Override
public void setSubmittedValue(UIComponent component, Object value) {
if (component instanceof UIInput) {
((UIInput) component).setSubmittedValue(value);
if (logger.isLoggable(Level.FINE)) {
logger.fine("Set submitted value " + value + " on component ");
}
}
}
// ------------------------------------------------------- Protected Methods
@Override
protected Object getValue(UIComponent component) {
if (component instanceof ValueHolder) {
Object value = ((ValueHolder) component).getValue();
if (logger.isLoggable(Level.FINE)) {
logger.fine("component.getValue() returned " + value);
}
return value;
}
return null;
}
// Returns the Behaviors map, but only if it contains some entry other
// than those handled by renderOnchange(). This helps us optimize
// renderPassThruAttributes() in the very common case where the
// button only contains an "valueChange" (or "change") Behavior. In that
// we pass a null Behaviors map into renderPassThruAttributes(),
// which allows us to take a more optimized code path.
protected static Map> getNonOnChangeBehaviors(UIComponent component) {
return getPassThruBehaviors(component, "change", "valueChange");
}
// Returns the Behaviors map, but only if it contains some entry other
// than those handled by renderOnchange(). This helps us optimize
// renderPassThruAttributes() in the very common case where the
// button only contains an "valueChange" (or "change") Behavior. In that
// we pass a null Behaviors map into renderPassThruAttributes(),
// which allows us to take a more optimized code path.
protected static Map> getNonOnClickSelectBehaviors(UIComponent component) {
return getPassThruBehaviors(component, "click", "valueChange");
}
// --------------------------------------------------------- Private Methods
private boolean hasStringConverter(FacesContext context) {
if (!hasStringConverterSet) {
hasStringConverter = (null !=
context.getApplication()
.createConverter(String.class));
hasStringConverterSet = true;
}
return hasStringConverter;
}
} // end of class HtmlBasicInputRenderer
