/**
 * The MIT License (MIT)
 *
 * Copyright (c) 2017 Yegor Bugayenko
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package org.cactoos.text;

import java.io.IOException;
import java.util.Base64;
import org.cactoos.Text;

/**
 * Base64 Decode the Text.
 *
 * @author Mehmet Yildirim (memoyil@gmail.com)
 * @version $Id$
 * @since 0.2
 */
public final class Base64DecodedText implements Text {

    /**
     * The text.
     */
    private final Text origin;

    /**
     * Ctor.
     *
     * @param text The text
     */
    public Base64DecodedText(final Text text) {
        this.origin = text;
    }

    @Override
    public String asString() throws IOException {
        final byte[] decoded = Base64.getDecoder().decode(this.origin
            .asString()
        );
        return new String(decoded, "utf-8");
    }
}

/**
 * The MIT License (MIT)
 *
 * Copyright (c) 2017 Yegor Bugayenko
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package org.cactoos.text;

import java.io.IOException;
import java.util.Base64;
import org.cactoos.Text;

/**
 * Base64 Decode the Text.
 *
 * @author Mehmet Yildirim (memoyil@gmail.com)
 * @version $Id$
 * @since 0.2
 */
public final class Base64DecodedText implements Text {

    /**
     * The text.
     */
    private final Text origin;

    /**
     * Ctor.
     *
     * @param text The text
     */
    public Base64DecodedText(final Text text) {
        this.origin = text;
    }

    @Override
    public String asString() throws IOException {
        final BytesAsText bytes = new BytesAsText(
            Base64.getDecoder().decode(
            this.origin.asString()
        ));
        return bytes.asString();
    }
}

Use BytesAsText Class #224