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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.schema.document;
import com.yahoo.document.ArrayDataType;
import com.yahoo.document.DataType;
import com.yahoo.document.MapDataType;
import com.yahoo.document.StructDataType;
/**
* Utils used to check whether a complex field supports being represented as struct field attributes.
*
* Currently we support:
* - array of simple struct
* - map of primitive type to simple struct
* - map of primitive type to primitive type
*
* A simple struct can contain fields of any type, but only fields of primitive type can be defined as
* struct field attributes in the complex field using the simple struct.
*
* @author geirst
*/
public class ComplexAttributeFieldUtils {
public static boolean isSupportedComplexField(ImmutableSDField field) {
return (isArrayOfSimpleStruct(field) ||
isMapOfSimpleStruct(field) ||
isMapOfPrimitiveType(field));
}
public static boolean isArrayOfSimpleStruct(ImmutableSDField field) {
if (field.getDataType() instanceof ArrayDataType) {
ArrayDataType arrayType = (ArrayDataType)field.getDataType();
return isStructWithPrimitiveStructFieldAttributes(arrayType.getNestedType(), field);
} else {
return false;
}
}
public static boolean isMapOfSimpleStruct(ImmutableSDField field) {
if (field.getDataType() instanceof MapDataType) {
MapDataType mapType = (MapDataType)field.getDataType();
return isPrimitiveType(mapType.getKeyType()) &&
isStructWithPrimitiveStructFieldAttributes(mapType.getValueType(),
field.getStructField("value"));
} else {
return false;
}
}
public static boolean isMapOfPrimitiveType(ImmutableSDField field) {
if (field.getDataType() instanceof MapDataType) {
MapDataType mapType = (MapDataType)field.getDataType();
return isPrimitiveType(mapType.getKeyType()) &&
isPrimitiveType(mapType.getValueType());
} else {
return false;
}
}
private static boolean isStructWithPrimitiveStructFieldAttributes(DataType type, ImmutableSDField field) {
if (type instanceof StructDataType && ! GeoPos.isPos(type)) {
for (ImmutableSDField structField : field.getStructFields()) {
Attribute attribute = structField.getAttributes().get(structField.getName());
if (attribute != null) {
if (!isPrimitiveType(attribute)) {
return false;
}
} else if (structField.wasConfiguredToDoAttributing()) {
if (!isPrimitiveType(structField.getDataType())) {
return false;
}
}
}
return true;
} else {
return false;
}
}
public static boolean isPrimitiveType(Attribute attribute) {
return attribute.getCollectionType().equals(Attribute.CollectionType.SINGLE) &&
isPrimitiveType(attribute.getDataType());
}
public static boolean isPrimitiveType(DataType dataType) {
return dataType.equals(DataType.BYTE) ||
dataType.equals(DataType.INT) ||
dataType.equals(DataType.LONG) ||
dataType.equals(DataType.FLOAT) ||
dataType.equals(DataType.DOUBLE) ||
dataType.equals(DataType.STRING);
}
public static boolean isComplexFieldWithOnlyStructFieldAttributes(ImmutableSDField field) {
if (isArrayOfSimpleStruct(field)) {
return hasOnlyStructFieldAttributes(field);
} else if (isMapOfSimpleStruct(field)) {
return (field.getStructField("key").hasSingleAttribute()) &&
hasOnlyStructFieldAttributes(field.getStructField("value"));
} else if (isMapOfPrimitiveType(field)) {
return (field.getStructField("key").hasSingleAttribute() &&
field.getStructField("value").hasSingleAttribute());
}
return false;
}
private static boolean hasOnlyStructFieldAttributes(ImmutableSDField field) {
for (ImmutableSDField structField : field.getStructFields()) {
if (!structField.hasSingleAttribute()) {
return false;
}
}
return true;
}
}
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