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This is the master POM file for Oracle's Implementation of the JSF 2.2 Specification.
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package com.sun.faces.el;
import javax.el.ELContext;
import javax.el.ELException;
import javax.el.ELResolver;
import javax.el.PropertyNotFoundException;
import javax.faces.context.FacesContext;
import javax.faces.el.EvaluationException;
import javax.faces.el.VariableResolver;
import java.beans.FeatureDescriptor;
import java.util.*;
import com.sun.faces.util.MessageUtils;
import com.sun.faces.util.RequestStateManager;
public class VariableResolverChainWrapper extends ELResolver {
@SuppressWarnings("deprecation")
private VariableResolver legacyVR = null;
@SuppressWarnings("deprecation")
public VariableResolverChainWrapper(VariableResolver variableResolver) {
this.legacyVR = variableResolver;
}
public void setWrapped(VariableResolver newVR) {
this.legacyVR = newVR;
}
@Override
@SuppressWarnings("deprecation")
public Object getValue(ELContext context, Object base, Object property)
throws ELException {
// Don't call into the chain unless it's been decorated.
if (legacyVR instanceof ChainAwareVariableResolver) {
return null;
}
if (base != null) {
return null;
}
if ( base == null && property == null) {
String message = MessageUtils.getExceptionMessageString
(MessageUtils.NULL_PARAMETERS_ERROR_MESSAGE_ID, "base and property"); // ?????
throw new PropertyNotFoundException(message);
}
context.setPropertyResolved(true);
Object result = null;
FacesContext facesContext = (FacesContext)
context.getContext(FacesContext.class);
String propString = property.toString();
Map stateMap = RequestStateManager.getStateMap(facesContext);
try {
// If we are already in the midst of an expression evaluation
// that touched this resolver...
//noinspection unchecked
List varNames = (List) stateMap.get(RequestStateManager.REENTRANT_GUARD);
if (varNames != null
&& !varNames.isEmpty()
&& varNames.contains(propString)) {
// take no action and return.
context.setPropertyResolved(false);
return null;
}
// Make sure subsequent calls don't take action.
if (varNames == null) {
varNames = new ArrayList();
stateMap.put(RequestStateManager.REENTRANT_GUARD, varNames);
}
varNames.add(propString);
result = legacyVR.resolveVariable(facesContext,
propString);
} catch (EvaluationException ex) {
context.setPropertyResolved(false);
throw new ELException(ex);
} finally {
// Make sure to remove the guard after the call returns
//noinspection unchecked
List varNames = (List) stateMap.get(RequestStateManager.REENTRANT_GUARD);
if (varNames != null && !varNames.isEmpty()) {
varNames.remove(propString);
}
// Make sure that the ELContext "resolved" indicator is set
// in accordance wth the result of the resolution.
context.setPropertyResolved(result != null);
}
return result;
}
@Override
public Class getType(ELContext context, Object base, Object property)
throws ELException {
// Don't call into the chain unless it's been decorated.
if (legacyVR instanceof ChainAwareVariableResolver) {
return null;
}
Object result = getValue(context, base, property);
context.setPropertyResolved(result != null);
if (result != null) {
return result.getClass();
}
return null;
}
@Override
public void setValue(ELContext context, Object base, Object property,
Object val) throws ELException {
// Don't call into the chain unless it's been decorated.
if (legacyVR instanceof ChainAwareVariableResolver) {
return;
}
if (null == base && null == property) {
throw new PropertyNotFoundException();
}
}
@Override
public boolean isReadOnly(ELContext context, Object base, Object property)
throws ELException {
// Don't call into the chain unless it's been decorated.
if (legacyVR instanceof ChainAwareVariableResolver) {
return false;
}
if (null == base && null == property) {
throw new PropertyNotFoundException();
}
return false;
}
@Override
public Iterator getFeatureDescriptors(ELContext context,
Object base) {
return null;
}
@Override
public Class getCommonPropertyType(ELContext context, Object base) {
// Don't call into the chain unless it's been decorated.
if (legacyVR instanceof ChainAwareVariableResolver) {
return null;
}
if ( base == null ) {
return String.class;
}
return null;
}
}