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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.derived;
import com.yahoo.document.CollectionDataType;
import com.yahoo.document.DataType;
import com.yahoo.document.NumericDataType;
import com.yahoo.document.datatypes.*;
/**
* A type of an index structure
*
* @author bratseth
*/
public class Index {
/** The index type enumeration */
public static class Type {
public static final Type TEXT = new Type("text");
public static final Type INT64 = new Type("long");
public static final Type BOOLEANTREE = new Type("booleantree");
private final String name;
private Type(String name) {
this.name=name;
}
public int hashCode() {
return name.hashCode();
}
public String getName() { return name; }
public boolean equals(Object other) {
if ( ! (other instanceof Type)) return false;
return this.name.equals(((Type)other).name);
}
public String toString() {
return "type: " + name;
}
}
/** Sets the right index type from a field type */
public static Type convertType(DataType fieldType) {
FieldValue fval = fieldType.createFieldValue();
if (fieldType instanceof NumericDataType) {
return Type.INT64;
} else if (fval instanceof StringFieldValue) {
return Type.TEXT;
} else if (fval instanceof Raw) {
return Type.BOOLEANTREE;
} else if (fval instanceof PredicateFieldValue) {
return Type.BOOLEANTREE;
} else if (fieldType instanceof CollectionDataType) {
return convertType(((CollectionDataType) fieldType).getNestedType());
} else {
throw new IllegalArgumentException("Don't know which index type to " +
"convert " + fieldType + " to");
}
}
}
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