taverna-xpath-activity/src/main/java/org/apache/taverna/activities/xpath/XPathActivityConfigurationBean.java [76:90]:
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	public static int validateXPath(String xpathExpressionToValidate) {
		// no XPath expression
		if (xpathExpressionToValidate == null
				|| xpathExpressionToValidate.trim().isEmpty()) {
			return XPATH_EMPTY;
		}

		try {
			// try to parse the XPath expression...
			createXPath(xpathExpressionToValidate.trim());
			// ...success
			return XPATH_VALID;
		} catch (InvalidXPathException e) {
			// ...failed to parse the XPath expression: notify of the error
			return XPATH_INVALID;
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taverna-xpath-activity/src/main/java/org/apache/taverna/activities/xpath/XPathUtils.java [49:63]:
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	public static int validateXPath(String xpathExpressionToValidate) {
		// no XPath expression
		if (xpathExpressionToValidate == null
				|| xpathExpressionToValidate.trim().isEmpty()) {
			return XPATH_EMPTY;
		}

		try {
			// try to parse the XPath expression...
			createXPath(xpathExpressionToValidate.trim());
			// ...success
			return XPATH_VALID;
		} catch (InvalidXPathException e) {
			// ...failed to parse the XPath expression: notify of the error
			return XPATH_INVALID;
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