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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.document.update;
import com.yahoo.document.CollectionDataType;
import com.yahoo.document.DataType;
import com.yahoo.document.datatypes.CollectionFieldValue;
import com.yahoo.document.datatypes.FieldValue;
import com.yahoo.document.datatypes.WeightedSet;
import com.yahoo.document.serialization.DocumentUpdateWriter;
/**
* <p>Value update representing an addition of a value (possibly with an associated weight)
* to a multi-valued data type.</p>
*
* @author <a href="mailto:einarmr@yahoo-inc.com">Einar M R Rosenvinge</a>
*/
public class AddValueUpdate extends ValueUpdate {
protected FieldValue value;
protected Integer weight;
AddValueUpdate(FieldValue value) {
super(ValueUpdateClassID.ADD);
setValue(value, 1);
}
public AddValueUpdate(FieldValue key, int weight) {
super(ValueUpdateClassID.ADD);
setValue(key, weight);
}
private void setValue(FieldValue key, int weight) {
this.value = key;
this.weight = weight;
}
/**
* Returns the value of this value update.
*
* @return the value of this ValueUpdate
* @see com.yahoo.document.DataType
*/
public FieldValue getValue() { return value; }
public void setValue(FieldValue value) { this.value=value; }
/**
* Return the associated weight of this value update.
*
* @return the weight of this value update, or 1 if unset
*/
public int getWeight() {
return weight;
}
@Override
public FieldValue applyTo(FieldValue val) {
if (val instanceof WeightedSet) {
WeightedSet wset = (WeightedSet) val;
wset.put(value, weight);
} else if (val instanceof CollectionFieldValue) {
CollectionFieldValue fval = (CollectionFieldValue) val;
fval.add(value);
} else {
throw new IllegalStateException("Cannot add "+value+" to field of type " + val.getClass().getName());
}
return val;
}
@Override
protected void checkCompatibility(DataType fieldType) {
if (!(fieldType instanceof CollectionDataType)) {
throw new UnsupportedOperationException("Expected collection, got " + fieldType.getName() + ".");
}
fieldType = ((CollectionDataType)fieldType).getNestedType();
if (value != null && !value.getDataType().equals(fieldType)) {
throw new IllegalArgumentException("Expected " + fieldType.getName() + ", got " +
value.getDataType().getName());
}
}
@Override
public void serialize(DocumentUpdateWriter data, DataType superType) {
data.write(this, superType);
}
@Override
public boolean equals(Object o) {
return o instanceof AddValueUpdate && super.equals(o) && value.equals(((AddValueUpdate) o).value) &&
weight.equals(((AddValueUpdate) o).weight);
}
@Override
public int hashCode() {
return super.hashCode() + value.hashCode() + weight;
}
@Override
public String toString() {
return super.toString() + " " + value + " " + weight;
}
}
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