com.sun.faces.taglib.jsf_core.AbstractConverterTag Maven / Gradle / Ivy
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package com.sun.faces.taglib.jsf_core;
import com.sun.faces.util.MessageUtils;
import com.sun.faces.util.FacesLogger;
import javax.faces.webapp.ConverterELTag;
import javax.faces.convert.Converter;
import javax.faces.context.FacesContext;
import javax.faces.FacesException;
import javax.el.ValueExpression;
import javax.el.ELContext;
import javax.servlet.jsp.JspException;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* Base class for all ConverterTags.
*/
public class AbstractConverterTag extends ConverterELTag {
private static final Logger LOGGER = FacesLogger.TAGLIB.getLogger();
/**
* The {@link javax.el.ValueExpression} that evaluates to an object that
* implements {@link javax.faces.convert.Converter}.
*/
protected ValueExpression binding = null;
/**
* The identifier of the {@link javax.faces.convert.Converter}
* instance to be created.
*/
protected ValueExpression converterId = null;
// ---------------------------------------------------------- Public Methods
/**
* Set the expression that will be used to create a
* {@link javax.el.ValueExpression} that references a backing bean property
* of the {@link javax.faces.convert.Converter} instance to be created.
*
* @param binding The new expression
*/
public void setBinding(ValueExpression binding) {
this.binding = binding;
}
/**
* Set the identifer of the {@link javax.faces.convert.Converter}
* instance to be created.
*
* @param converterId The identifier of the converter instance to be
* created.
*/
public void setConverterId(ValueExpression converterId) {
this.converterId = converterId;
}
// --------------------------------------------- Methods from ConverterELTag
protected Converter createConverter() throws JspException {
try {
return createConverter(converterId,
binding,
FacesContext.getCurrentInstance());
} catch (FacesException fe) {
throw new JspException(fe.getCause());
}
}
protected static Converter createConverter(ValueExpression converterId,
ValueExpression binding,
FacesContext facesContext) {
ELContext elContext = facesContext.getELContext();
Converter converter = null;
// If "binding" is set, use it to create a converter instance.
if (binding != null) {
try {
converter = (Converter) binding.getValue(elContext);
if (converter != null) {
return converter;
}
} catch (Exception e) {
throw new FacesException(e);
}
}
// If "converterId" is set, use it to create the converter
// instance. If "converterId" and "binding" are both set, store the
// converter instance in the value of the property represented by
// the ValueExpression 'binding'.
if (converterId != null) {
try {
String converterIdVal = (String)
converterId.getValue(elContext);
converter = facesContext.getApplication()
.createConverter(converterIdVal);
if (converter != null && binding != null) {
binding.setValue(elContext, converter);
}
} catch (Exception e) {
throw new FacesException(e);
}
}
if (converter == null) {
if (LOGGER.isLoggable(Level.WARNING)) {
LOGGER.log(Level.WARNING,
MessageUtils.getExceptionMessageString(
MessageUtils.CANNOT_CONVERT_ID,
converterId != null ? converterId.getExpressionString() : "",
binding != null ? binding.getExpressionString() : ""));
}
}
return converter;
}
}