Hi, some comments below... Oliver
Am 29.12.2011 11:02, schrieb M M:
Hi, I'm trying to use /_*Commons Configuration*_/ to parse an XML configuration file and I'm having some troubles with the xpath syntax. After a few tries I understood that I need to use the XPathExpressionEngine, and i think that the problems I'm facing are due to the xpath syntax I'm using. Here is the xml file: ------------------------------------------------------------------------ <general-configuration> <permissions> <allowed-projects> <project id="10020" key="TP1">test project 1</project> <project id="10021" key="TP2">test project 2</project> <project id="10022" key="TP3">test project 3</project> </allowed-projects> <allowed-groups> <group id="xyz" name="test group"/> </allowed-groups> <allowed-users> <user id="zxy" name="test user"/> </allowed-users> </permissions> <kpi-definition> <project id="10020" key="DP"> <issue-type id="1" name="Bug"> <kpi id="1" name="t0 - t1" days="0" hours="0" minutes="10"> <transition id="1" name="a">1</transition> <transition id="2" name="b">2</transition> </kpi> <kpi id="2" name="t1 - t2" days="0" hours="1" minutes="0"> <transition id="3" name="c">1</transition> <transition id="4" name="d">2</transition> </kpi> </issue-type> <issue-type id="3" name="Task"> <kpi id="1" name="t0 - t1" days="0" hours="0" minutes="10"> <transition id="5" name="e"></transition> <transition id="6" name="f"></transition> </kpi> <kpi id="2" name="t1 - t2" days="0" hours="1" minutes="0"> <transition id="7" name="g"></transition> <transition id="8" name="h"></transition> </kpi> </issue-type> </project> </kpi-definition> </general-configuration> ------------------------------------------------------------------------ And here is the code I wrote to try to understand how to get what i want using the XPathExpressionEngine ------------------------------------------------------------------------ private XMLConfiguration configurationFile; configurationFile = new XMLConfiguration(/"kpi_configuration.xml"/); configurationFile.setExpressionEngine(new XPathExpressionEngine()); DefaultExpressionEngine defaultEngine = new DefaultExpressionEngine(); defaultEngine.setPropertyDelimiter(/"/"/); configurationFile.setExpressionEngine(defaultEngine); *// using the default expression engine i get what i want, a list of the // "id" attributes of the project tag (10020,10021,10022)* List<String> testList001 = configurationFile.getList(/"permissions/allowed-projects/project[@id]"/); for (Iterator<String> iterator = testList001.iterator(); iterator.hasNext();) { System.out.println(iterator.next()); } configurationFile.setExpressionEngine(new XPathExpressionEngine()); *// using the xpath expression engine, and giving exactly the same path to the getList method // i get a completely different result! the list is made of the text content of the tag // (test project 1, test project 2, test project 3)* List<String> testList002 = configurationFile.getList(/"permissions/allowed-projects/project[@id]"/); for (Iterator<String> iterator = testList002.iterator(); iterator.hasNext();) { System.out.println(iterator.next()); }
Try the key "permissions/allowed-projects/project/@id"; the square brackets are not needed for accessing attributes.
*// here I tried to use the xpath syntax [@attribute=value] to get into a specific branch of the xml tree // the expected result was at least a list of values, instead i get null object* List<String> testList003 = configurationFile.getList(/"kpi-definition/project[@id=10020]/issue-type[@id=1]/transition"/); for (Iterator<String> iterator = testList003.iterator(); iterator.hasNext();) { System.out.println(iterator.next()); }
For this and the following example it may be necessary to quote the values because they are strings, e.g.
"kpi-definition/project[@id='10020']/issue-type[@id='1']/transition"
*// here I tried to use the xpath syntax [@attribute=value] to get into a specific branch of the xml tree // the expected result was a single value instead i got a null object* String testValue001 = configurationFile.getString(/"kpi-definition/project[@id=10020]/issue-type[@id=1]/transition[@name=a]"/); System.out.println(testValue001); Many, many thanks in advance to everyone who can help me! I really can't work it out (... and I have to :) ... ) MM
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