/**
* Ask whether this query uses the context item
*
* @return true if the context item is referenced either in the query body or in the initializer
* of any global variable
*/
public boolean usesContextItem() {
if ((expression.getDependencies() & StaticProperty.DEPENDS_ON_FOCUS) != 0) {
return true;
}
HashMap map = executable.getCompiledGlobalVariables();
if (map != null) {
Iterator iter = map.values().iterator();
while (iter.hasNext()) {
GlobalVariable var = (GlobalVariable) iter.next();
Expression select = var.getSelectExpression();
if (select != null && (select.getDependencies() & StaticProperty.DEPENDS_ON_FOCUS) != 0) {
return true;
}
}
}
return false;
}
private static List<String> analyzeExpression(Expression expression, String xpathString) {
if (expression instanceof ComputedExpression) {
try {
final PathMap pathmap = new PathMap((ComputedExpression) expression, new Configuration());
logger.info("TEST XPATH PATHS - path for expression: " + xpathString);
pathmap.diagnosticDump(System.out);
final int dependencies = expression.getDependencies();
if ((dependencies & StaticProperty.DEPENDS_ON_CONTEXT_ITEM) != 0) {
System.out.println(" xxx DEPENDS_ON_CONTEXT_ITEM");
return null;
}
if ((dependencies & StaticProperty.DEPENDS_ON_CURRENT_ITEM) != 0) {
System.out.println(" xxx DEPENDS_ON_CURRENT_ITEM");
return null;
}
if ((dependencies & StaticProperty.DEPENDS_ON_CONTEXT_DOCUMENT) != 0) {
System.out.println(" xxx DEPENDS_ON_CONTEXT_DOCUMENT");
return null;
}
if ((dependencies & StaticProperty.DEPENDS_ON_LOCAL_VARIABLES) != 0) {
System.out.println(" xxx DEPENDS_ON_LOCAL_VARIABLES");
// Some day we'll have variables
return null;
}
if ((dependencies & StaticProperty.NON_CREATIVE) != 0) {
System.out.println(" xxx NON_CREATIVE");
}
final List<String> instancesList = new ArrayList<String>();
final PathMap.PathMapRoot[] roots = pathmap.getPathMapRoots();
for (final PathMap.PathMapRoot root : roots) {
final Expression rootExpression = root.getRootExpression();
if (rootExpression instanceof Instance || rootExpression instanceof XXFormsInstance) {
final FunctionCall functionCall = (FunctionCall) rootExpression;
// TODO: Saxon 9.0 expressions should test "instanceof StringValue" to "instanceof
// StringLiteral"
if (functionCall.getArguments()[0] instanceof StringValue) {
final String instanceName =
((StringValue) functionCall.getArguments()[0]).getStringValue();
instancesList.add(instanceName);
} else {
// Instance name is not known at compile time
return null;
}
} else if (rootExpression
instanceof Doc) { // don't need document() function as that is XSLT
final FunctionCall functionCall = (FunctionCall) rootExpression;
// TODO: Saxon 9.0 expressions should test "instanceof StringValue" to "instanceof
// StringLiteral"
if (functionCall.getArguments()[0] instanceof StringValue) {
// final String literalURI = ((StringValue)
// functionCall.getArguments()[0]).getStringValue();
return null;
} else {
// Document name is not known at compile time
return null;
}
} else if (rootExpression instanceof ContextItemExpression) {
return null;
} else if (rootExpression instanceof RootExpression) {
// We depend on the current XForms model.
return null;
}
// final PathMap.PathMapArc[] rootArcs = root.getArcs();
//
// for (int j = 0; j < rootArcs.length; j++) {
// final PathMapArc currentArc = rootArcs[j];
// final AxisExpression getStep
// }
}
return instancesList;
} catch (Exception e) {
logger.error("EXCEPTION WHILE ANALYZING PATHS: " + xpathString);
return null;
}
} else {
logger.info("TEST XPATH PATHS - expression not a ComputedExpression: " + xpathString);
return Collections.emptyList();
}
}