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15 package ch.qos.logback.core.model.processor.conditional;
16
17 import ch.qos.logback.core.Context;
18 import ch.qos.logback.core.boolex.PropertyCondition;
19 import ch.qos.logback.core.model.Model;
20 import ch.qos.logback.core.model.conditional.IfModel;
21 import ch.qos.logback.core.model.conditional.ByPropertiesConditionModel;
22 import ch.qos.logback.core.model.processor.ModelHandlerBase;
23 import ch.qos.logback.core.model.processor.ModelHandlerException;
24 import ch.qos.logback.core.model.processor.ModelInterpretationContext;
25 import ch.qos.logback.core.util.OptionHelper;
26
27 import static ch.qos.logback.core.model.conditional.IfModel.BranchState.ELSE_BRANCH;
28 import static ch.qos.logback.core.model.conditional.IfModel.BranchState.IF_BRANCH;
29
30 public class ByPropertiesConditionModelHandler extends ModelHandlerBase {
31
32 private boolean inError = false;
33 PropertyCondition propertyEvaluator;
34
35 public ByPropertiesConditionModelHandler(Context context) {
36 super(context);
37 }
38
39 @Override
40 protected Class<ByPropertiesConditionModel> getSupportedModelClass() {
41 return ByPropertiesConditionModel.class;
42 }
43
44 static public ModelHandlerBase makeInstance(Context context, ModelInterpretationContext mic) {
45 return new ByPropertiesConditionModelHandler(context);
46 }
47
48
49 @Override
50 public void handle(ModelInterpretationContext mic, Model model) throws ModelHandlerException {
51
52 ByPropertiesConditionModel byPropertiesConditionModel = (ByPropertiesConditionModel) model;
53 String className = byPropertiesConditionModel.getClassName();
54 if (OptionHelper.isNullOrEmptyOrAllSpaces(className)) {
55 addWarn("Missing className. This should have been caught earlier.");
56 inError = true;
57 return;
58 } else {
59 className = mic.getImport(className);
60 }
61 try {
62 addInfo("About to instantiate PropertyEvaluator of type [" + className + "]");
63
64 propertyEvaluator = (PropertyCondition) OptionHelper.instantiateByClassName(className,
65 PropertyCondition.class, context);
66 propertyEvaluator.setContext(context);
67 propertyEvaluator.setLocalPropertyContainer(mic);
68 mic.pushObject(propertyEvaluator);
69 } catch (Exception e) {
70 inError = true;
71 mic.pushObject(IfModel.BranchState.IN_ERROR);
72 addError("Could not create a SequenceNumberGenerator of type [" + className + "].", e);
73 throw new ModelHandlerException(e);
74 }
75 }
76
77 public void postHandle(ModelInterpretationContext mic, Model model) throws ModelHandlerException {
78 if (inError) {
79 return;
80 }
81 Object o = mic.peekObject();
82 if (o != propertyEvaluator) {
83 addWarn("The object at the of the stack is not the propertyEvaluator instance pushed earlier.");
84 } else {
85 mic.popObject();
86 }
87
88 propertyEvaluator.start();
89 if(!propertyEvaluator.isStarted()) {
90 addError("PropertyEvaluator of type ["+propertyEvaluator.getClass().getName()+"] did not start successfully.");
91 mic.pushObject(IfModel.BranchState.IN_ERROR);
92 return;
93 }
94 boolean evaluationResult = propertyEvaluator.evaluate();
95 IfModel.BranchState branchState = evaluationResult ? IF_BRANCH : ELSE_BRANCH;
96 mic.pushObject(branchState);
97
98 }
99 }