de.brands4friends.daleq.core.EnumeratingTemplateValue.java Source code

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Here is the source code for de.brands4friends.daleq.core.EnumeratingTemplateValue.java

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/*
 * Copyright 2012 brands4friends, Private Sale GmbH
 *
 * 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 de.brands4friends.daleq.core;

import java.math.BigInteger;
import java.util.List;

import com.google.common.collect.ImmutableList;

public class EnumeratingTemplateValue<T> implements TemplateValue {

    private final List<T> values;

    public EnumeratingTemplateValue(final List<T> values) {
        this.values = ImmutableList.copyOf(values);
    }

    @Override
    public Object transform(final long value) {
        final int idx = BigInteger.valueOf(value).abs().mod(BigInteger.valueOf(values.size())).intValue();
        return values.get(idx);
    }
}