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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.searchlib.expression;
import java.util.HashMap;
import java.util.Map;
/**
* This class implements a lookup table for result node type conversion.
*
* @author Ulf Lilleengen
*/
public class ArithmeticTypeConversion {
private static final Map<Integer, Map<Integer, Integer>> types = new HashMap<Integer, Map<Integer, Integer>>();
static {
add(IntegerResultNode.classId, IntegerResultNode.classId, IntegerResultNode.classId);
add(IntegerResultNode.classId, FloatResultNode.classId, FloatResultNode.classId);
add(IntegerResultNode.classId, StringResultNode.classId, IntegerResultNode.classId);
add(IntegerResultNode.classId, RawResultNode.classId, IntegerResultNode.classId);
add(FloatResultNode.classId, IntegerResultNode.classId, FloatResultNode.classId);
add(FloatResultNode.classId, FloatResultNode.classId, FloatResultNode.classId);
add(FloatResultNode.classId, StringResultNode.classId, FloatResultNode.classId);
add(FloatResultNode.classId, RawResultNode.classId, FloatResultNode.classId);
add(StringResultNode.classId, IntegerResultNode.classId, IntegerResultNode.classId);
add(StringResultNode.classId, FloatResultNode.classId, FloatResultNode.classId);
add(StringResultNode.classId, StringResultNode.classId, StringResultNode.classId);
add(StringResultNode.classId, RawResultNode.classId, StringResultNode.classId);
add(RawResultNode.classId, IntegerResultNode.classId, IntegerResultNode.classId);
add(RawResultNode.classId, FloatResultNode.classId, FloatResultNode.classId);
add(RawResultNode.classId, StringResultNode.classId, StringResultNode.classId);
add(RawResultNode.classId, RawResultNode.classId, RawResultNode.classId);
}
private static void add(int a, int b, int c) {
Map<Integer, Integer> entry;
if (types.containsKey(a)) {
entry = types.get(a);
} else {
entry = new HashMap<Integer, Integer>();
}
entry.put(b, c);
types.put(a, entry);
}
public static ResultNode getType(ResultNode arg) {
return (ResultNode)ResultNode.createFromId(getBaseType(arg));
}
public static ResultNode getType(ResultNode arg1, ResultNode arg2) {
return (ResultNode)ResultNode.createFromId(types.get(getBaseType(arg1)).get(getBaseType(arg2)));
}
public static int getBaseType(ResultNode arg) {
if (arg instanceof IntegerResultNode) {
return IntegerResultNode.classId;
} else if (arg instanceof FloatResultNode) {
return FloatResultNode.classId;
} else if (arg instanceof StringResultNode) {
return StringResultNode.classId;
} else if (arg instanceof RawResultNode) {
return RawResultNode.classId;
} else {
return ResultNode.classId;
}
}
}
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