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package org.apache.lucene.analysis.tokenattributes;
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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import org.apache.lucene.util.Attribute;
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* The term text of a Token.
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public interface CharTermAttribute extends Attribute, CharSequence, Appendable {
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/** Copies the contents of buffer, starting at offset for
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* length characters, into the termBuffer array.
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* @param buffer the buffer to copy
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* @param offset the index in the buffer of the first character to copy
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* @param length the number of characters to copy
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public void copyBuffer(char[] buffer, int offset, int length);
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/** Returns the internal termBuffer character array which
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* you can then directly alter. If the array is too
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* small for your token, use {@link
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* #resizeBuffer(int)} to increase it. After
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* altering the buffer be sure to call {@link
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* #setLength} to record the number of valid
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* characters that were placed into the termBuffer. */
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public char[] buffer();
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/** Grows the termBuffer to at least size newSize, preserving the
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* @param newSize minimum size of the new termBuffer
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* @return newly created termBuffer with length >= newSize
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public char[] resizeBuffer(int newSize);
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/** Set number of valid characters (length of the term) in
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* the termBuffer array. Use this to truncate the termBuffer
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* or to synchronize with external manipulation of the termBuffer.
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* Note: to grow the size of the array,
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* use {@link #resizeBuffer(int)} first.
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* @param length the truncated length
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public CharTermAttribute setLength(int length);
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/** Sets the length of the termBuffer to zero.
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* Use this method before appending contents
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* using the {@link Appendable} interface.
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public CharTermAttribute setEmpty();
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// the following methods are redefined to get rid of IOException declaration:
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public CharTermAttribute append(CharSequence csq);
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public CharTermAttribute append(CharSequence csq, int start, int end);
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public CharTermAttribute append(char c);
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/** Appends the specified {@code String} to this character sequence.
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* <p>The characters of the {@code String} argument are appended, in order, increasing the length of
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* this sequence by the length of the argument. If argument is {@code null}, then the four
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* characters {@code "null"} are appended.
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public CharTermAttribute append(String s);
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/** Appends the specified {@code StringBuilder} to this character sequence.
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* <p>The characters of the {@code StringBuilder} argument are appended, in order, increasing the length of
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* this sequence by the length of the argument. If argument is {@code null}, then the four
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* characters {@code "null"} are appended.
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public CharTermAttribute append(StringBuilder sb);
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/** Appends the contents of the other {@code CharTermAttribute} to this character sequence.
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* <p>The characters of the {@code CharTermAttribute} argument are appended, in order, increasing the length of
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* this sequence by the length of the argument. If argument is {@code null}, then the four
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* characters {@code "null"} are appended.
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public CharTermAttribute append(CharTermAttribute termAtt);