io.permazen.core.SimpleFieldStorageInfo Maven / Gradle / Ivy
/*
* Copyright (C) 2015 Archie L. Cobbs. All rights reserved.
*/
package io.permazen.core;
import java.util.NavigableSet;
import java.util.Set;
import java.util.function.Predicate;
/**
* Represents an index on a simple field, either a regular simple field or a sub-field of a complex field.
*/
abstract class SimpleFieldStorageInfo extends IndexStorageInfo {
final FieldType fieldType;
SimpleFieldStorageInfo(SimpleField field) {
super(field.storageId);
this.fieldType = field.fieldType.genericizeForIndex();
}
CoreIndex getIndex(Transaction tx) {
return new CoreIndex<>(tx.kvt, new IndexView<>(this.storageId, this.fieldType, FieldTypeRegistry.OBJ_ID));
}
/**
* Remove all references from objects in the specified referrers set to the specified target through
* the reference field associated with this instance. Used to implement {@link DeleteAction#UNREFERENCE}.
*
*
* This method may assume that this instance's {@link FieldType} is reference.
*
* @param tx transaction
* @param target referenced object being deleted
* @param referrers objects that refer to {@code target} via this reference field
*/
abstract void unreferenceAll(Transaction tx, ObjId target, NavigableSet referrers);
/**
* Read this field from the given object and add non-null value(s) to the given set.
*
* @param tx transaction
* @param id object being accessed
* @param values read values
* @param filter optional filter to apply
*/
abstract void readAllNonNull(Transaction tx, ObjId id, Set values, Predicate filter);
// Object
@Override
public boolean equals(Object obj) {
if (obj == this)
return true;
if (!super.equals(obj))
return false;
final SimpleFieldStorageInfo that = (SimpleFieldStorageInfo)obj;
return this.fieldType.equals(that.fieldType);
}
@Override
public int hashCode() {
return super.hashCode() ^ this.fieldType.hashCode();
}
}