eq throws NPE from ConstantImpl

[Vesa Marttila]

With an expression such as id.eq(null) the following exception is thrown:

java.lang.NullPointerException
        at com.mysema.query.types.ConstantImpl.<init>(ConstantImpl.java:124)
        at com.mysema.query.types.expr.SimpleExpression.eq(SimpleExpression.java:130)

This is due to this constructor:

public ConstantImpl(T constant){
    this((Class)constant.getClass(), constant);
}

The problem occurs at least in the Lucene module.

[Timo Westkämper (timo-westkamper)]

Ok, we need a more descriptive Exception for this.

id.eq(null) is not allowed, for "id is null" you need to use id.isNull()

[Timo Westkämper (timo-westkamper)]

The Exception is now : throw new IllegalArgumentException("eq(null) is not allowed. Use isNull() instead");

[Timo Westkämper (timo-westkamper)]

Released in 2.1.2