I was able to fix this by initializing the 'invalidValues' field to a zero
length array inside Validators.ValidatingResolver's constructor. I added it
to my application, overriding the existing Seam component:
| package com.foo.seam;
|
| import org.hibernate.validator.ClassValidator;
| import org.hibernate.validator.InvalidValue;
| import org.jboss.seam.Component;
| import org.jboss.seam.Instance;
| import org.jboss.seam.ScopeType;
| import org.jboss.seam.core.SeamResourceBundle;
| import org.jboss.seam.annotations.Name;
| import org.jboss.seam.annotations.Scope;
| import org.jboss.seam.annotations.intercept.BypassInterceptors;
| import org.jboss.seam.contexts.Contexts;
| import org.jboss.seam.el.EL;
|
| import javax.el.ELContext;
| import javax.el.ELException;
| import javax.el.ELResolver;
| import javax.el.PropertyNotFoundException;
| import javax.el.PropertyNotWritableException;
| import javax.el.ValueExpression;
| import java.beans.FeatureDescriptor;
| import java.util.Iterator;
| import java.util.Locale;
| import java.util.Map;
| import java.util.concurrent.ConcurrentHashMap;
|
| /**
| * Caches instances of Hibernate Validator ClassValidator
| *
| * @author Gavin King
| * @author Josh - patched up the inner class.
| */
| @Name("org.jboss.seam.core.validators")
| @BypassInterceptors
| @Scope(ScopeType.APPLICATION)
| public class Validators extends org.jboss.seam.core.Validators
| {
|
| /**
| * Validate that the given value can be assigned to the property given
by the value
| * expression.
| *
| * @param valueExpression a value expression, referring to a property
| * @param elContext the ELContext in which to evaluate the expression
| * @param value a value to be assigned to the property
| * @return a set of potential InvalidValues, from Hibernate Validator
| */
| public InvalidValue[] validate(ValueExpression valueExpression,
ELContext elContext, Object value)
| {
| ValidatingResolver validatingResolver = new ValidatingResolver(
elContext.getELResolver() );
| ELContext decoratedContext = EL.createELContext(elContext,
validatingResolver);
| valueExpression.setValue(decoratedContext, value);
| return validatingResolver.getInvalidValues();
| }
|
| class ValidatingResolver extends ELResolver
| {
| private ELResolver delegate;
| private InvalidValue[] invalidValues;
|
| public ValidatingResolver(ELResolver delegate)
| {
| this.delegate = delegate;
| invalidValues = new InvalidValue[0]; // <== Initialize array.
| }
|
| public InvalidValue[] getInvalidValues()
| {
| return invalidValues;
| }
|
| @Override
| public Class<?> getCommonPropertyType(ELContext context, Object value)
| {
| return delegate.getCommonPropertyType(context, value);
| }
|
| @Override
| public Iterator<FeatureDescriptor> getFeatureDescriptors(ELContext
context, Object value)
| {
| return delegate.getFeatureDescriptors(context, value);
| }
|
| @Override
| public Class<?> getType(ELContext context, Object x, Object y)
| throws NullPointerException, PropertyNotFoundException,
ELException
| {
| return delegate.getType(context, x, y);
| }
|
| @Override
| public Object getValue(ELContext context, Object base, Object
property)
| throws NullPointerException, PropertyNotFoundException,
ELException
| {
| return delegate.getValue(context, base, property);
| }
|
| @Override
| public boolean isReadOnly(ELContext context, Object base, Object
property)
| throws NullPointerException, PropertyNotFoundException,
ELException
| {
| return delegate.isReadOnly(context, base, property);
| }
|
| @Override
| public void setValue(ELContext context, Object base, Object property,
Object value)
| throws NullPointerException, PropertyNotFoundException,
PropertyNotWritableException, ELException
| {
| if (base!=null && property!=null )
| {
| context.setPropertyResolved(true);
| invalidValues = getValidator(base).getPotentialInvalidValues(
property.toString(), value );
| }
| }
| }
| }
|
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