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/*
* Copyright 2004-2011 H2 Group.
* Copyright 2011 James Moger.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.iciql.bytecode;
import com.iciql.Query;
import com.iciql.SQLStatement;
import com.iciql.Token;
/**
* A NOT condition.
*/
public class Not implements Token {
private Token expr;
private Not(Token expr) {
this.expr = expr;
}
static Token get(Token expr) {
if (expr instanceof Not) {
return ((Not) expr).expr;
} else if (expr instanceof Operation) {
return ((Operation) expr).reverse();
}
return new Not(expr);
}
Token not() {
return expr;
}
public <T> void appendSQL(SQLStatement stat, Query<T> query) {
// untested
stat.appendSQL("NOT(");
expr.appendSQL(stat, query);
stat.appendSQL(")");
}
}
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