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Apache Commons Lang, a package of Java utility classes for the classes that are in java.lang's hierarchy, or are considered to be so standard as to justify existence in java.lang. The code is tested using the latest revision of the JDK for supported LTS releases: 8, 11, 17 and 21 currently. See https://github.com/apache/commons-lang/blob/master/.github/workflows/maven.yml Please ensure your build environment is up-to-date and kindly report any build issues.

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.commons.lang3.text;

import java.text.FieldPosition;
import java.text.Format;
import java.text.ParseException;
import java.text.ParsePosition;

/**
 * Formats using one formatter and parses using a different formatter. An
 * example of use for this would be a webapp where data is taken in one way and
 * stored in a database another way.
 * @deprecated As of 3.6, use Apache Commons Text
 * 
 * CompositeFormat instead
 */
@Deprecated
public class CompositeFormat extends Format {

    /**
     * Required for serialization support.
     *
     * @see java.io.Serializable
     */
    private static final long serialVersionUID = -4329119827877627683L;

    /** The parser to use. */
    private final Format parser;
    /** The formatter to use. */
    private final Format formatter;

    /**
     * Create a format that points its parseObject method to one implementation
     * and its format method to another.
     *
     * @param parser implementation
     * @param formatter implementation
     */
    public CompositeFormat(final Format parser, final Format formatter) {
        this.parser = parser;
        this.formatter = formatter;
    }

    /**
     * Uses the formatter Format instance.
     *
     * @param obj the object to format
     * @param toAppendTo the {@link StringBuffer} to append to
     * @param pos the FieldPosition to use (or ignore).
     * @return {@code toAppendTo}
     * @see Format#format(Object, StringBuffer, FieldPosition)
     */
    @Override // Therefore has to use StringBuffer
    public StringBuffer format(final Object obj, final StringBuffer toAppendTo,
            final FieldPosition pos) {
        return formatter.format(obj, toAppendTo, pos);
    }

    /**
     * Provides access to the parser Format implementation.
     *
     * @return formatter Format implementation
     */
    public Format getFormatter() {
        return this.formatter;
    }

    /**
     * Provides access to the parser Format implementation.
     *
     * @return parser Format implementation
     */
    public Format getParser() {
        return this.parser;
    }

    /**
     * Uses the parser Format instance.
     *
     * @param source the String source
     * @param pos the ParsePosition containing the position to parse from, will
     *            be updated according to parsing success (index) or failure
     *            (error index)
     * @return the parsed Object
     * @see Format#parseObject(String, ParsePosition)
     */
    @Override
    public Object parseObject(final String source, final ParsePosition pos) {
        return parser.parseObject(source, pos);
    }

    /**
     * Utility method to parse and then reformat a String.
     *
     * @param input String to reformat
     * @return A reformatted String
     * @throws ParseException thrown by parseObject(String) call
     */
    public String reformat(final String input) throws ParseException {
        return format(parseObject(input));
    }

}