org.trimou.engine.interpolation.DotKeySplitter.java Source code

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Here is the source code for org.trimou.engine.interpolation.DotKeySplitter.java

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/*
 * Copyright 2013 Martin Kouba
 *
 * 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 org.trimou.engine.interpolation;

import java.util.Iterator;

import org.trimou.engine.config.AbstractConfigurationAware;
import org.trimou.util.Strings;

import com.google.common.base.Splitter;
import com.google.common.collect.Iterators;

/**
 * The default {@link KeySplitter} implementation which follows the dot notation.
 *
 * @author Martin Kouba
 */
public class DotKeySplitter extends AbstractConfigurationAware implements KeySplitter {

    private final Splitter splitter;

    public DotKeySplitter() {
        splitter = Splitter.on(Strings.DOT).omitEmptyStrings();
    }

    @Override
    public Iterator<String> split(final String key) {
        if (key.equals(Strings.DOT)) {
            return Iterators.singletonIterator(Strings.DOT);
        }
        if (key.equals(Strings.THIS)) {
            return Iterators.singletonIterator(Strings.THIS);
        }
        if (!key.contains(Strings.DOT)) {
            return Iterators.singletonIterator(key);
        }
        return splitter.split(key).iterator();
    }

}