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package eu.dnetlib.validator.service.impls.rules;
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import java.util.List;
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import java.util.Properties;
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import eu.dnetlib.validator.engine.data.Rule;
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import eu.dnetlib.validator.engine.data.RuleException;
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import eu.dnetlib.validator.engine.execution.ValidationObject;
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/**
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* Applies a chain of rules on a single Validation Object.
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* The behavior may be changedusing the {@link ChainRule#TYPE} property.
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* @author manos
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*
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* @param <T>
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*/
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public class ChainRule<T extends Rule> extends Rule {
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private static final long serialVersionUID = -6422953546341833949L;
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protected final List<T> rules;
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/**
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* Permitted values:
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* 'or': true if any of the rules is successful
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* 'and': true if all the rules are successful
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* 'horn': rule[0] => rule[1] /\ rule[2] /\ ... /\ rule[n-1]
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*/
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public static final String TYPE = "type";
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public ChainRule(Properties pros, int id, List<T> rules) {
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super(pros, id);
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this.rules = rules;
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log.debug("Chain Rule. Rules: "+rules);
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}
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@Override
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public boolean apply(ValidationObject obj) throws RuleException {
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if(rules.size() == 0)
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return true;
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String condition = pros.getProperty(TYPE).trim();
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if(condition.equalsIgnoreCase("AND")) {
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for(T rule : rules) {
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if(!rule.apply(obj))
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return false;
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}
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return true;
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} else if(condition.equalsIgnoreCase("OR")) {
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for(T rule : rules) {
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if(rule.apply(obj))
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return true;
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}
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return false;
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} else if(condition.equalsIgnoreCase("HORN")) {
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if(!rules.get(0).apply(obj))
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return true;
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for(int i=1; i<rules.size(); i++) {
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T rule = rules.get(i);
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if(!rule.apply(obj))
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return false;
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}
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return true;
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} else {
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return false;
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}
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}
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}
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