/*
* Copyright (c) 2011-2015 EPFL DATA Laboratory
* Copyright (c) 2014-2015 The Squall Collaboration (see NOTICE)
*
* All rights reserved.
*
* 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 ch.epfl.data.squall.expressions;
import java.util.List;
import ch.epfl.data.squall.types.IntegerType;
import ch.epfl.data.squall.types.Type;
import ch.epfl.data.squall.visitors.ValueExpressionVisitor;
//translates double 123.45 to 12345
public class DoubleToInt implements ValueExpression<Integer> {
private static final long serialVersionUID = 1L;
private final Type<Integer> _wrapper = new IntegerType();
private int _columnIndex;
public DoubleToInt(int columnIndex) {
_columnIndex = columnIndex;
}
@Override
public void accept(ValueExpressionVisitor vev) {
throw new RuntimeException("Not implemented for a moment!");
// vev.visit(this);
}
// unused
@Override
public void changeValues(int i, ValueExpression<Integer> newExpr) {
// nothing
}
@Override
public Integer eval(List<String> tuple) {
String value = tuple.get(_columnIndex);
value = value.replace(".", "");
return _wrapper.fromString(value);
}
@Override
public String evalString(List<String> tuple) {
final int result = eval(tuple);
return _wrapper.toString(result);
}
@Override
public List<ValueExpression> getInnerExpressions() {
return null;
}
@Override
public Type getType() {
return _wrapper;
}
@Override
public void inverseNumber() {
// nothing
}
@Override
public boolean isNegative() {
return false;
}
@Override
public String toString() {
final StringBuilder sb = new StringBuilder();
sb.append("DoubleToInt ").append(_columnIndex);
return sb.toString();
}
}