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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.document.datatypes;
import com.yahoo.document.CollectionDataType;
import java.util.Collection;
import java.util.Iterator;
/**
* Superclass of multivalue field values
*
* @author Håkon Humberset
*/
public abstract class CollectionFieldValue<T extends FieldValue> extends CompositeFieldValue {
CollectionFieldValue(CollectionDataType type) {
super(type);
}
@Override
public CollectionDataType getDataType() {
return (CollectionDataType) super.getDataType();
}
/**
* Utility function to wrap primitives.
*
* @see Array.ListWrapper
*/
protected FieldValue createFieldValue(Object o) {
if (o instanceof FieldValue) {
if (!getDataType().getNestedType().isValueCompatible((FieldValue) o)) {
throw new IllegalArgumentException(
"Incompatible data types. Got "
+ ((FieldValue)o).getDataType() + ", expected "
+ getDataType().getNestedType());
}
return (FieldValue) o;
} else {
FieldValue fval = getDataType().getNestedType().createFieldValue();
fval.assign(o);
return fval;
}
}
public void verifyElementCompatibility(T o) {
if (!getDataType().getNestedType().isValueCompatible(o)) {
throw new IllegalArgumentException(
"Incompatible data types. Got "
+ o.getDataType() + ", expected "
+ getDataType().getNestedType());
}
}
public abstract Iterator<T> fieldValueIterator();
// Collection implementation
public abstract boolean add(T value);
public abstract boolean contains(Object o);
public abstract boolean isEmpty();
protected boolean isEmpty(Collection collection) {
return collection.isEmpty();
}
public abstract Iterator<T> iterator();
public abstract boolean removeValue(FieldValue o);
protected boolean removeValue(FieldValue o, Collection collection) {
int removedCount = 0;
while (collection.remove(o)) {
++removedCount;
}
return (removedCount > 0);
}
public abstract int size();
}
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