java/text/Annotation.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
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 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 *
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package java.text;

/**
* An Annotation object is used as a wrapper for a text attribute value if
* the attribute has annotation characteristics. These characteristics are:
* <ul>
* <li>The text range that the attribute is applied to is critical to the
* semantics of the range. That means, the attribute cannot be applied to subranges
* of the text range that it applies to, and, if two adjacent text ranges have
* the same value for this attribute, the attribute still cannot be applied to
* the combined range as a whole with this value.
* <li>The attribute or its value usually do no longer apply if the underlying text is
* changed.
* </ul>
*
* An example is grammatical information attached to a sentence:
* For the previous sentence, you can say that "an example"
* is the subject, but you cannot say the same about "an", "example", or "exam".
* When the text is changed, the grammatical information typically becomes invalid.
* Another example is Japanese reading information (yomi).
*
* <p>
* Wrapping the attribute value into an Annotation object guarantees that
* adjacent text runs don't get merged even if the attribute values are equal,
* and indicates to text containers that the attribute should be discarded if
* the underlying text is modified.
*
* @see AttributedCharacterIterator
* @since 1.2
*/

public class Annotation {

    /**
     * Constructs an annotation record with the given value, which
     * may be null.
     *
     * @param value the value of the attribute
     */
    public Annotation(Object value) {
        this.value = value;
    }

    /**
     * Returns the value of the attribute, which may be null.
     *
     * @return the value of the attribute
     */
    public Object getValue() {
        return value;
    }

    /**
     * Returns the String representation of this Annotation.
     *
     * @return the {@code String} representation of this {@code Annotation}
     */
    public String toString() {
        return getClass().getName() + "[value=" + value + "]";
    }

    private Object value;

};