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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;
import com.yahoo.document.datatypes.WeightedSet;
import com.yahoo.vespa.objects.Ids;
import com.yahoo.vespa.objects.ObjectVisitor;
/**
* @author Einar M R Rosenvinge
*/
public class WeightedSetDataType extends CollectionDataType {
// The global class identifier shared with C++.
public static int classId = registerClass(Ids.document + 55, WeightedSetDataType.class);
/** Should an operation to a non-existent member of a weightedset cause the member to be created */
private boolean createIfNonExistent = false;
/** Should a member of a weightedset with weight 0 be removed */
private boolean removeIfZero = false;
/** The tag type is ambiguous, this flag is true if the user explicitly set a field to tag */
private boolean tag = false;
public WeightedSetDataType(DataType nestedType, boolean createIfNonExistent, boolean removeIfZero) {
this(nestedType, createIfNonExistent, removeIfZero, 0);
}
public WeightedSetDataType(DataType nestedType, boolean createIfNonExistent, boolean removeIfZero, int id) {
super(createName(nestedType, createIfNonExistent, removeIfZero), id, nestedType);
this.createIfNonExistent = createIfNonExistent;
this.removeIfZero = removeIfZero;
if (id == 0) {
if ((nestedType == STRING) && createIfNonExistent && removeIfZero) { // the tag type definition
setId(TAG_ID);
} else {
setId(getName().toLowerCase().hashCode());
}
}
int code = getId();
if ((code >= 0) && (code <= DataType.lastPredefinedDataTypeId()) && (code != TAG_ID)) {
throw new IllegalArgumentException("Cannot create a weighted set datatype with code " + code);
}
}
@Override
public WeightedSetDataType clone() {
return (WeightedSetDataType) super.clone();
}
/**
* Called by SD parser if a data type is explicitly tag.
*
* @param tag true if this is a tag set.
*/
public void setTag(boolean tag) {
this.tag = tag;
}
/**
* Returns whether or not this is a <em>tag</em> type weighted set.
*
* @return true if this is a tag set.
*/
public boolean isTag() {
return tag;
}
static private String createName(DataType nested, boolean createIfNonExistent, boolean removeIfZero) {
if (nested == DataType.STRING && createIfNonExistent && removeIfZero) {
return "tag";
} else {
String name = "WeightedSet<" + nested.getName() + ">";
if (createIfNonExistent) name += ";Add";
if (removeIfZero) name += ";Remove";
return name;
}
}
@Override
public WeightedSet createFieldValue() {
return new WeightedSet(this);
}
@Override
public Class getValueClass() {
return WeightedSet.class;
}
/**
* Returns true if this has the property createIfNonExistent (only relevant for weighted sets)
*
* @return createIfNonExistent property
*/
public boolean createIfNonExistent() {
return createIfNonExistent;
}
/**
* Returns true if this has the property removeIfZero (only relevant for weighted sets)
*
* @return removeIfZero property
*/
public boolean removeIfZero() {
return removeIfZero;
}
@Override
public void visitMembers(ObjectVisitor visitor) {
super.visitMembers(visitor);
visitor.visit("removeIfZero", removeIfZero);
visitor.visit("createIfNonExistent", createIfNonExistent);
}
@Override
public FieldPath buildFieldPath(String remainFieldName) {
return MapDataType.buildFieldPath(remainFieldName, getNestedType(), DataType.INT);
}
}
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