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POString javax.xml.xpath.XPathExpression.evaluate(Object item) guarantees it never returns null in all implementations?
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1985234
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1985274
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2
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2009-12-31T12:30:17.350
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2012-07-19T05:30:15.963
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239168
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text
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<p>From the <a href="http://java.sun.com/j2se/1.5.0/docs/api/javax/xml/xpath/XPathExpression.html#evaluate(java.lang.Object)" rel="nofollow noreferrer">JavaDoc</a>: returns: The String that is the result of evaluating the expression and converting the result to a String.</p> <pre><code>/** * ... * ... * @return The <code>String</code> that is the result of evaluating the expression and converting the result to a * <code>String</code>. * ... * ... */ String javax.xml.xpath.XPathExpression.evaluate(Object item) </code></pre> <p>The question is, it is a bit vauge what is the contract here in case the expression finds nothing. Is null an valid / invalid return in all implementations? where is the return API defined? in the JSR?</p>
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<java><java-api><xpath-api>
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String javax.xml.xpath.XPathExpression.evaluate(Object item) guarantees it never returns null in all implementations?
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1. USEran Medan
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