public static void collectInfo(ExpressionInfo info, MExpression exp) {
if (!(exp instanceof MCoreExpression)) {
return;
}
MCoreExpression expr = (MCoreExpression) exp;
Expression ref = null;
if (expr.getCoreExpression() instanceof Expression) {
ref = (Expression) expr.getCoreExpression();
} else {
ref = new ReferenceExpression(expr.getCoreExpressionId());
expr.setCoreExpression(ref);
}
ref.collectExpressionInfo(info);
}
public boolean isEnabled() {
try {
Expression enablementExpression = getEnablementExpression();
if (enablementExpression == null) {
return true;
}
EvaluationContext context = new EvaluationContext(null, this);
EvaluationResult evaluationResult = enablementExpression.evaluate(context);
return evaluationResult != EvaluationResult.FALSE;
} catch (CoreException e) {
ConsolePlugin.log(e);
return false;
}
}
public static boolean isVisible(MCoreExpression exp, ExpressionContext eContext) {
Expression ref = null;
if (exp.getCoreExpression() instanceof Expression) {
ref = (Expression) exp.getCoreExpression();
} else {
ref = new ReferenceExpression(exp.getCoreExpressionId());
exp.setCoreExpression(ref);
}
try {
// Creates dependency on a predefined value that can be "poked" by the evaluation
// service
ExpressionInfo info = ref.computeExpressionInfo();
String[] names = info.getAccessedPropertyNames();
for (String name : names) {
eContext.getVariable(name + ".evaluationServiceLink"); // $NON-NLS-1$
}
return ref.evaluate(eContext) != EvaluationResult.FALSE;
} catch (CoreException e) {
trace("isVisible exception", e); // $NON-NLS-1$
}
return false;
}
@Override
protected boolean isPreservedFilter(ViewerFilter filter) {
if (filter instanceof CoreExpressionFilter) {
CoreExpressionFilter expressionFilter = (CoreExpressionFilter) filter;
Set<String> preservedIds =
ContextUiPlugin.getDefault().getPreservedFilterIds(viewPart.getSite().getId());
if (!preservedIds.isEmpty()) {
try {
Expression expression2 = (Expression) filterExpressionField1.get(expressionFilter);
for (CommonFilterDescriptor commonFilterDescriptor : filterDescriptors) {
if (preservedIds.contains(commonFilterDescriptor.getId())) {
Expression expression1 =
(Expression) filterExpressionField2.get(commonFilterDescriptor);
if (expression1 != null && expression1.equals(expression2)) {
return true;
}
}
}
} catch (IllegalArgumentException e) {
StatusHandler.log(
new Status(
IStatus.ERROR,
ResourcesUiBridgePlugin.ID_PLUGIN,
"Could not determine filter",
e)); //$NON-NLS-1$
} catch (IllegalAccessException e) {
StatusHandler.log(
new Status(
IStatus.ERROR,
ResourcesUiBridgePlugin.ID_PLUGIN,
"Could not determine filter",
e)); //$NON-NLS-1$
}
}
}
return false;
}
public boolean matches(IJavaProject javaProject) {
if (fStatus != null) {
return fStatus.booleanValue();
}
IConfigurationElement[] children =
fConfigurationElement.getChildren(ExpressionTagNames.ENABLEMENT);
if (children.length == 1) {
try {
ExpressionConverter parser = ExpressionConverter.getDefault();
Expression expression = parser.perform(children[0]);
EvaluationContext evalContext = new EvaluationContext(null, javaProject);
evalContext.addVariable("project", javaProject); // $NON-NLS-1$
evalContext.addVariable(
"sourceLevel", javaProject.getOption(JavaCore.COMPILER_SOURCE, true)); // $NON-NLS-1$
return expression.evaluate(evalContext) == EvaluationResult.TRUE;
} catch (CoreException e) {
JavaPlugin.log(e);
}
return false;
}
fStatus = Boolean.FALSE;
return false;
}