com.oschrenk.flatfiles.util.PrefixRemoverLineTransformer.java Source code

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Here is the source code for com.oschrenk.flatfiles.util.PrefixRemoverLineTransformer.java

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/*
 * Copyright 2011 Oliver Schrenk
 *
 * 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.oschrenk.flatfiles.util;

import java.util.Set;

import com.google.common.base.Function;
import com.google.common.collect.Sets;

/**
 * The Class PrefixRemoverLineTransformer.
 *
 * @author Oliver Schrenk <oliver.schrenk@gmail.com>
 */
public class PrefixRemoverLineTransformer implements Function<String, String> {

    /** The prefixes. */
    private final Set<String> prefixes;

    /**
     * Instantiates a new prefix remover line transformer.
     *
     * @param prefix
     *            the prefix
     */
    public PrefixRemoverLineTransformer(final String prefix) {
        this(Sets.newHashSet(prefix));
    }

    /**
     * Instantiates a new prefix remover line transformer.
     *
     * @param prefixes
     *            the prefixes
     */
    public PrefixRemoverLineTransformer(final String... prefixes) {
        this(Sets.newHashSet(prefixes));
    }

    /**
     * Instantiates a new prefix remover line transformer.
     *
     * @param prefixes
     *            the prefixes
     */
    public PrefixRemoverLineTransformer(final Set<String> prefixes) {
        this.prefixes = prefixes;
    }

    /*
     * (non-Javadoc)
     *
     * @see com.google.common.base.Function#apply(java.lang.Object)
     */
    @Override
    public String apply(final String line) {
        for (final String prefix : prefixes) {
            if (line.startsWith(prefix)) {
                return line.substring(prefix.length());
            }
        }
        return line;
    }

}