/**
* Copyright (C) 2009-2013 FoundationDB, LLC
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.foundationdb.server.types.common.funcs;
import com.foundationdb.server.types.*;
import com.foundationdb.server.types.value.ValueSource;
import com.foundationdb.server.types.value.ValueTarget;
import com.foundationdb.server.types.texpressions.TInputSetBuilder;
import com.foundationdb.server.types.texpressions.TScalarBase;
public class Chr extends TScalarBase
{
private final TClass charType, intType;
public Chr(TClass charType, TClass intType){
this.charType = charType;
this.intType = intType;
}
@Override
protected void buildInputSets(TInputSetBuilder builder)
{
builder.covers(intType, 0);
}
@Override
protected void doEvaluate(TExecutionContext context, LazyList<? extends ValueSource> inputs, ValueTarget output) {
int inp = inputs.get(0).getInt32();
output.putString(new String(Character.toChars(inp)), null);
}
@Override
public String displayName()
{
return "CHR";
}
@Override
public TOverloadResult resultType()
{
return TOverloadResult.fixed(charType, 1);
}
}