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Implementing Xor operation

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This commit is contained in:
Jesus Castagnetto 2013-02-01 17:59:16 -08:00
parent 29d594ef2f
commit 473e2f367f
1 changed files with 42 additions and 0 deletions
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main/src/com/google/refine/expr/functions/booleans/Xor.java Normal file
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/*
Implementing a naive XOR operation
Copyright 2013, Jesus M. Castagnetto
License: BSD 2-Clause License (http://opensource.org/licenses/BSD-2-Clause)
*/
package com.google.refine.expr.functions.booleans;
import java.util.Properties;
import org.json.JSONException;
import org.json.JSONWriter;
import com.google.refine.expr.EvalError;
import com.google.refine.grel.ControlFunctionRegistry;
import com.google.refine.grel.Function;
public class Xor implements Function {
@Override
public Object call(Properties bindings, Object[] args) {
if (args.length == 2 &&
args[0] != null && args[0] instanceof Boolean &&
args[1] != null && args[0] instanceof Boolean) {
boolean o1 = ((Boolean) args[0]).booleanValue();
boolean o2 = ((Boolean) args[1]).booleanValue();
return o1 != o2;
}
return new EvalError(ControlFunctionRegistry.getFunctionName(this) + " expects 2 booleans");
}
@Override
public void write(JSONWriter writer, Properties options)
throws JSONException {
writer.object();
writer.key("description"); writer.value("XORs two boolean values");
writer.key("params"); writer.value("boolean a, boolean b");
writer.key("returns"); writer.value("boolean");
writer.endObject();
}
}