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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.update;
import com.yahoo.document.DataType;
import com.yahoo.document.datatypes.FieldValue;
import com.yahoo.document.serialization.DocumentUpdateWriter;
/**
* <p>Value update that represents assigning a new value.</p>
*
* @author Einar M R Rosenvinge
*/
public class AssignValueUpdate extends ValueUpdate {
protected FieldValue value;
public AssignValueUpdate(FieldValue value) {
super(ValueUpdateClassID.ASSIGN);
this.value = value;
}
/**
* <p>Returns the value of this value update.</p>
*
* <p>The type of the value is defined by the type of this field
* in this documents DocumentType - a java.lang primitive wrapper for single value types,
* java.util.List for arrays and {@link com.yahoo.document.datatypes.WeightedSet WeightedSet}
* for weighted sets.</p>
*
* @return the value of this ValueUpdate
* @see com.yahoo.document.DataType
*/
public FieldValue getValue() { return value; }
/**
* <p>Sets the value to assign.</p>
*
* <p>The type of the value must match the type of this field
* in this documents DocumentType - a java.lang primitive wrapper for single value types,
* java.util.List for arrays and {@link com.yahoo.document.datatypes.WeightedSet WeightedSet}
* for weighted sets.</p>
*/
public void setValue(FieldValue value) { this.value=value; }
@Override
public FieldValue applyTo(FieldValue fval) {
if (value == null) return null;
fval.assign(value);
return fval;
}
@Override
protected void checkCompatibility(DataType fieldType) {
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) {
boolean baseEquals = o instanceof AssignValueUpdate && super.equals(o);
if (!baseEquals) return false;
if (value == null && ((AssignValueUpdate) o).value == null) {
return true;
} else if (value != null && value.equals(((AssignValueUpdate) o).value)) {
return true;
}
return false;
}
@Override
public int hashCode() {
return super.hashCode() + (value == null ? 0 : value.hashCode());
}
@Override
public String toString() {
return super.toString() + " " + value;
}
}
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