org.simpleflatmapper.map.context.KeyAndPredicate Maven / Gradle / Ivy
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Java library to map flat record - ResultSet, csv - to java object with minimum configuration and low footprint.
package org.simpleflatmapper.map.context;
import org.simpleflatmapper.util.Predicate;
public class KeyAndPredicate implements Predicate {
public final K key;
public final Predicate predicate;
public KeyAndPredicate(K key, Predicate predicate) {
this.key = key;
this.predicate = predicate;
}
@Override
public boolean test(S s) {
return predicate == null ? true : predicate.test(s);
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
KeyAndPredicate that = (KeyAndPredicate) o;
if (!key.equals(that.key)) return false;
return predicate != null ? predicate.equals(that.predicate) : that.predicate == null;
}
@Override
public int hashCode() {
int result = key.hashCode();
result = 31 * result + (predicate != null ? predicate.hashCode() : 0);
return result;
}
public KeyAndPredicate mergeWith(KeyAndPredicate keyAndPredicate) {
if (!this.key.equals(keyAndPredicate.key)) throw new IllegalArgumentException();
if (this.predicate == null || keyAndPredicate.predicate == null) { // null is equivalent to true
return this;
}
if (this.predicate.equals(keyAndPredicate.predicate)) {
return this;
}
return new KeyAndPredicate(key, new OrPredicate(predicate, keyAndPredicate.predicate));
}
private static class OrPredicate implements Predicate {
private final Predicate p1;
private final Predicate p2;
private OrPredicate(Predicate p1, Predicate p2) {
this.p1 = p1;
this.p2 = p2;
}
@Override
public boolean test(S s) {
return p1.test(s) || p2.test(s);
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
OrPredicate that = (OrPredicate) o;
if (p1 != null ? !p1.equals(that.p1) : that.p1 != null) return false;
return p2 != null ? p2.equals(that.p2) : that.p2 == null;
}
@Override
public int hashCode() {
int result = p1 != null ? p1.hashCode() : 0;
result = 31 * result + (p2 != null ? p2.hashCode() : 0);
return result;
}
}
}