// Evaluates the specified Criteria on the specified flowfile. Clones the
// specified flow file for each rule that is applied.
private boolean evaluateCriteria(
final ProcessSession session,
final ProcessContext context,
final Criteria criteria,
final FlowFile flowfile,
final Map<FlowFile, List<Rule>> matchedRules) {
final ComponentLog logger = getLogger();
final List<Rule> rules = criteria.getRules();
// consider each rule and hold a copy of the flowfile for each matched rule
for (final Rule rule : rules) {
// evaluate the rule
if (evaluateRule(context, rule, flowfile)) {
final FlowFile flowfileToUse;
// determine if we should use the original flow file or clone
if (FlowFilePolicy.USE_ORIGINAL.equals(criteria.getFlowFilePolicy())
|| matchedRules.isEmpty()) {
flowfileToUse = flowfile;
} else {
// clone the original for this rule
flowfileToUse = session.clone(flowfile);
}
// store the flow file to use when executing this rule
List<Rule> rulesForFlowFile = matchedRules.get(flowfileToUse);
if (rulesForFlowFile == null) {
rulesForFlowFile = new ArrayList<>();
matchedRules.put(flowfileToUse, rulesForFlowFile);
}
rulesForFlowFile.add(rule);
// log if appropriate
if (logger.isDebugEnabled()) {
logger.debug(
this
+ " all conditions met for rule '"
+ rule.getName()
+ "'. Using flow file - "
+ flowfileToUse);
}
}
}
return !matchedRules.isEmpty();
}
@Override
public Collection<SearchResult> search(final SearchContext context) {
final String term = context.getSearchTerm();
final Collection<SearchResult> results = new ArrayList<>();
if (StringUtils.isBlank(context.getAnnotationData())) {
return results;
}
try {
// parse the annotation data
final Criteria criteria = CriteriaSerDe.deserialize(context.getAnnotationData());
// ensure there are some rules
if (criteria.getRules() != null) {
final FlowFilePolicy flowFilePolicy = criteria.getFlowFilePolicy();
if (flowFilePolicy != null && StringUtils.containsIgnoreCase(flowFilePolicy.name(), term)) {
results.add(
new SearchResult.Builder()
.label("FlowFile policy")
.match(flowFilePolicy.name())
.build());
}
for (final Rule rule : criteria.getRules()) {
if (StringUtils.containsIgnoreCase(rule.getName(), term)) {
results.add(
new SearchResult.Builder().label("Rule name").match(rule.getName()).build());
}
// ensure there are some conditions
if (rule.getConditions() != null) {
for (final Condition condition : rule.getConditions()) {
if (StringUtils.containsIgnoreCase(condition.getExpression(), term)) {
results.add(
new SearchResult.Builder()
.label(String.format("Condition in rule '%s'", rule.getName()))
.match(condition.getExpression())
.build());
}
}
}
// ensure there are some actions
if (rule.getActions() != null) {
for (final Action action : rule.getActions()) {
if (StringUtils.containsIgnoreCase(action.getAttribute(), term)) {
results.add(
new SearchResult.Builder()
.label(String.format("Action in rule '%s'", rule.getName()))
.match(action.getAttribute())
.build());
}
if (StringUtils.containsIgnoreCase(action.getValue(), term)) {
results.add(
new SearchResult.Builder()
.label(String.format("Action in rule '%s'", rule.getName()))
.match(action.getValue())
.build());
}
}
}
}
}
return results;
} catch (Exception e) {
return results;
}
}
@Override
protected Collection<ValidationResult> customValidate(final ValidationContext context) {
final List<ValidationResult> reasons = new ArrayList<>(super.customValidate(context));
Criteria criteria = null;
try {
criteria = CriteriaSerDe.deserialize(context.getAnnotationData());
} catch (IllegalArgumentException iae) {
reasons.add(
new ValidationResult.Builder()
.valid(false)
.explanation("Unable to deserialize the update criteria." + iae.getMessage())
.build());
}
// if there is criteria, validate it
if (criteria != null) {
final List<Rule> rules = criteria.getRules();
if (rules == null) {
reasons.add(
new ValidationResult.Builder()
.valid(false)
.explanation("Update criteria has been specified by no rules were found.")
.build());
} else {
// validate the each rule
for (final Rule rule : rules) {
if (rule.getName() == null || rule.getName().trim().isEmpty()) {
reasons.add(
new ValidationResult.Builder()
.valid(false)
.explanation("A rule name was not specified.")
.build());
}
// validate each condition
final Set<Condition> conditions = rule.getConditions();
if (conditions == null) {
reasons.add(
new ValidationResult.Builder()
.valid(false)
.explanation(
String.format("No conditions for rule '%s' found.", rule.getName()))
.build());
} else {
for (final Condition condition : conditions) {
if (condition.getExpression() == null) {
reasons.add(
new ValidationResult.Builder()
.valid(false)
.explanation(
String.format(
"No expression for a condition in rule '%s' was found.",
rule.getName()))
.build());
} else {
final String expression = condition.getExpression().trim();
reasons.add(
StandardValidators.createAttributeExpressionLanguageValidator(
AttributeExpression.ResultType.BOOLEAN, false)
.validate(
String.format("Condition for rule '%s'.", rule.getName()),
expression,
context));
}
}
}
// validate each action
final Set<Action> actions = rule.getActions();
if (actions == null) {
reasons.add(
new ValidationResult.Builder()
.valid(false)
.explanation(String.format("No actions for rule '%s' found.", rule.getName()))
.build());
} else {
for (final Action action : actions) {
if (action.getAttribute() == null) {
reasons.add(
new ValidationResult.Builder()
.valid(false)
.explanation(
String.format(
"An action in rule '%s' is missing the attribute name.",
rule.getName()))
.build());
} else if (action.getValue() == null) {
reasons.add(
new ValidationResult.Builder()
.valid(false)
.explanation(
String.format(
"No value for attribute '%s' in rule '%s' was found.",
action.getAttribute(), rule.getName()))
.build());
} else {
reasons.add(
StandardValidators.createAttributeExpressionLanguageValidator(
AttributeExpression.ResultType.STRING, true)
.validate(
String.format("Action for rule '%s'.", rule.getName()),
action.getValue(),
context));
}
}
}
}
}
}
return reasons;
}
