If you just add the validation-api-version-sources.jar, you'll get
more errors. You need validation-api-version.jar too
[java] Compiling module
com.google.gwt.gadgets.sample.hellogadgets.HelloGadgets
[java]Resolving
com.google.gwt.validation.client.constraints.AbstractDecimalMaxValidator
[java] Found type
'com.google.gwt.validation.client.constraints.AbstractDecimalMaxValidator'
[java] Found type
'javax.validation.constraints.DecimalMax'
[java] [WARN] Ignoring unresolvable annotation type
javax.validation.Constraint
[java]Resolving
com.google.gwt.validation.client.constraints.AbstractDecimalMinValidator
[java] Found type
'com.google.gwt.validation.client.constraints.AbstractDecimalMinValidator'
[java] Found type
'javax.validation.constraints.DecimalMin'
[java] [WARN] Ignoring unresolvable annotation type
javax.validation.Constraint
[java]Resolving
com.google.gwt.validation.client.constraints.AbstractDigitsValidator
[java] Found type
'com.google.gwt.validation.client.constraints.AbstractDigitsValidator'
[java] Found type 'javax.validation.constraints.Digits'
[java] [WARN] Ignoring unresolvable annotation type
javax.validation.Constraint
[java]Resolving
com.google.gwt.validation.client.constraints.AbstractMaxValidator
[java] Found type
'com.google.gwt.validation.client.constraints.AbstractMaxValidator'
[java] Found type 'javax.validation.constraints.Max'
[java] [WARN] Ignoring unresolvable annotation type
javax.validation.Constraint
[java]Resolving
com.google.gwt.validation.client.constraints.AbstractMinValidator
[java] Found type
'com.google.gwt.validation.client.constraints.AbstractMinValidator'
[java] Found type 'javax.validation.constraints.Min'
[java] [WARN] Ignoring unresolvable annotation type
javax.validation.Constraint
[java]Resolving
com.google.gwt.validation.client.constraints.AbstractSizeValidator
[java] Found type
'com.google.gwt.validation.client.constraints.AbstractSizeValidator'
[java] Found type 'javax.validation.constraints.Size'
[java] [WARN] Ignoring unresolvable annotation type
javax.validation.Constraint
[java]Resolving
com.google.gwt.validation.client.constraints.AssertFalseValidator
[java] Found type
'com.google.gwt.validation.client.constraints.AssertFalseValidator'
[java] Found type
'javax.validation.constraints.AssertFalse'
[java] [WARN] Ignoring unresolvable annotation type
javax.validation.Constraint
[java]Resolving
com.google.gwt.validation.client.constraints.AssertTrueValidator
[java] Found type
'com.google.gwt.validation.client.constraints.AssertTrueValidator'
[java] Found type
'javax.validation.constraints.AssertTrue'
[java] [WARN] Ignoring unresolvable annotation type
javax.validation.Constraint
[java]Resolving
com.google.gwt.validation.client.constraints.FutureValidatorForDate
[java] Found type
'com.google.gwt.validation.client.constraints.FutureValidatorForDate'
[java] Found type 'javax.validation.constraints.Future'
[java] [WARN] Ignoring unresolvable annotation type
javax.validation.Constraint
[java]Resolving
com.google.gwt.validation.client.constraints.NotNullValidator
[java] Found type
'com.google.gwt.validation.client.constraints.NotNullValidator'
[java] Found type 'javax.validation.constraints.NotNull'
[java] [WARN] Ignoring unresolvable annotation type
javax.validation.Constraint
[java]Resolving
com.google.gwt.validation.client.constraints.NullValidator
[java] Found type
'com.google.gwt.validation.client.constraints.NullValidator'
[java] Found type 'javax.validation.constraints.Null'
[java] [WARN] Ignoring unresolvable annotation type
javax.validation.Constraint
[java]Resolving
com.google.gwt.validation.client.constraints.PastValidatorForDate
[java] Found type
'com.google.gwt.validation.client.constraints.PastValidatorForDate'
[java] Found type 'javax.validation.constraints.Past'
[java] [WARN] Ignoring unresolvable annotation type
javax.validation.Constraint
[java]Resolving
com.google.gwt.validation.client.constraints.PatternValidator
[java] Found type
'com.google.gwt.validation.client.constraints.PatternValidator'
[java] Found type 'javax.validation.constraints.Pattern'
[java] [WARN] Ignoring unresolvable annotation type
javax.validation.Constraint
http://gwt-code-reviews.appspot.com/1422804/
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