/**
* 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 java.util.List;
import com.foundationdb.server.error.InvalidParameterValueException;
import com.foundationdb.server.types.LazyList;
import com.foundationdb.server.types.TClass;
import com.foundationdb.server.types.TCustomOverloadResult;
import com.foundationdb.server.types.TExecutionContext;
import com.foundationdb.server.types.TInstance;
import com.foundationdb.server.types.TOverloadResult;
import com.foundationdb.server.types.TPreptimeContext;
import com.foundationdb.server.types.TPreptimeValue;
import com.foundationdb.server.types.TScalar;
import com.foundationdb.server.types.common.types.StringAttribute;
import com.foundationdb.server.types.texpressions.TInputSetBuilder;
import com.foundationdb.server.types.texpressions.TScalarBase;
import com.foundationdb.server.types.value.ValueSource;
import com.foundationdb.server.types.value.ValueTarget;
import com.foundationdb.util.Strings;
public class QuoteIdent extends TScalarBase
{
public static TScalar[] create(TClass varchar, TClass tbool) {
return new TScalar[] {
new QuoteIdent(varchar, tbool, varchar, 0), // ('string')
new QuoteIdent(varchar, tbool, varchar, 0, 1), // ('string', 'quote')
new QuoteIdent(varchar, tbool, varchar, 0, 1, 2), // ('string', 'quote', 'force')
};
}
protected final TClass inputTypeString;
protected final TClass inputTypeBool;
protected final TClass outputType;
protected final int[] covering;
private QuoteIdent(TClass inputTypeString, TClass inputTypeBool, TClass outputType, int... covering) {
this.inputTypeString = inputTypeString;
this.inputTypeBool = inputTypeBool;
this.outputType = outputType;
this.covering = covering;
}
@Override
public String displayName() {
return "QUOTE_IDENT";
}
@Override
public TOverloadResult resultType() {
// actual return type is exactly the same as input type
return TOverloadResult.custom(new TCustomOverloadResult()
{
@Override
public TInstance resultInstance(List<TPreptimeValue> inputs, TPreptimeContext context)
{
TInstance source = inputs.get(0).type();
return inputTypeString.instance(source.attribute(StringAttribute.MAX_LENGTH) + 2,
source.attribute(StringAttribute.CHARSET),
source.attribute(StringAttribute.COLLATION),
anyContaminatingNulls(inputs));
}
});
}
@Override
protected void buildInputSets(TInputSetBuilder builder) {
if (covering.length == 1) {
builder.covers(inputTypeString, covering);
}
else if (covering.length == 2) {
builder.covers(inputTypeString, 0).covers(inputTypeString, 1);
}
else {
builder.covers(inputTypeString, 0).covers(inputTypeString, 1);
builder.covers(inputTypeBool, 2);
}
}
@Override
protected boolean nullContaminates(int inputIndex) {
return true;
}
@Override
protected boolean neverConstant() {
return false;
}
@Override
protected void doEvaluate(TExecutionContext context,
LazyList<? extends ValueSource> inputs,
ValueTarget output) {
// defaults:
String s = inputs.get(0).getString();
char c = '\"';
boolean b = false;
if( s.isEmpty() )
{
throw new InvalidParameterValueException("Empty identifier");
}
if( covering.length >= 2) {
String arg2 = inputs.get(1).getString();
if (arg2.length() == 1) {
c = arg2.charAt(0);
}
else {
throw new InvalidParameterValueException(("one character as quote allowed"));
}
}
if ( covering.length == 3) {
b = inputs.get(2).getBoolean();
}
output.putString( Strings.quotedIdent(s, c, b), null );
}
}