+++ /dev/null
-package org.apache.lucene.analysis.icu.segmentation;
-
-/**
- * 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.
- */
-
-import com.ibm.icu.lang.UScript;
-import com.ibm.icu.text.BreakIterator;
-
-/**
- * An internal BreakIterator for multilingual text, following recommendations
- * from: UAX #29: Unicode Text Segmentation. (http://unicode.org/reports/tr29/)
- * <p>
- * See http://unicode.org/reports/tr29/#Tailoring for the motivation of this
- * design.
- * <p>
- * Text is first divided into script boundaries. The processing is then
- * delegated to the appropriate break iterator for that specific script.
- * <p>
- * This break iterator also allows you to retrieve the ISO 15924 script code
- * associated with a piece of text.
- * <p>
- * See also UAX #29, UTR #24
- * @lucene.experimental
- */
-final class CompositeBreakIterator {
- private final ICUTokenizerConfig config;
- private final BreakIteratorWrapper wordBreakers[] = new BreakIteratorWrapper[UScript.CODE_LIMIT];
-
- private BreakIteratorWrapper rbbi;
- private final ScriptIterator scriptIterator = new ScriptIterator();
-
- private char text[];
-
- CompositeBreakIterator(ICUTokenizerConfig config) {
- this.config = config;
- }
-
- /**
- * Retrieve the next break position. If the RBBI range is exhausted within the
- * script boundary, examine the next script boundary.
- *
- * @return the next break position or BreakIterator.DONE
- */
- int next() {
- int next = rbbi.next();
- while (next == BreakIterator.DONE && scriptIterator.next()) {
- rbbi = getBreakIterator(scriptIterator.getScriptCode());
- rbbi.setText(text, scriptIterator.getScriptStart(),
- scriptIterator.getScriptLimit() - scriptIterator.getScriptStart());
- next = rbbi.next();
- }
- return (next == BreakIterator.DONE) ? BreakIterator.DONE : next
- + scriptIterator.getScriptStart();
- }
-
- /**
- * Retrieve the current break position.
- *
- * @return the current break position or BreakIterator.DONE
- */
- int current() {
- final int current = rbbi.current();
- return (current == BreakIterator.DONE) ? BreakIterator.DONE : current
- + scriptIterator.getScriptStart();
- }
-
- /**
- * Retrieve the rule status code (token type) from the underlying break
- * iterator
- *
- * @return rule status code (see RuleBasedBreakIterator constants)
- */
- int getRuleStatus() {
- return rbbi.getRuleStatus();
- }
-
- /**
- * Retrieve the UScript script code for the current token. This code can be
- * decoded with UScript into a name or ISO 15924 code.
- *
- * @return UScript script code for the current token.
- */
- int getScriptCode() {
- return scriptIterator.getScriptCode();
- }
-
- /**
- * Set a new region of text to be examined by this iterator
- *
- * @param text buffer of text
- * @param start offset into buffer
- * @param length maximum length to examine
- */
- void setText(final char text[], int start, int length) {
- this.text = text;
- scriptIterator.setText(text, start, length);
- if (scriptIterator.next()) {
- rbbi = getBreakIterator(scriptIterator.getScriptCode());
- rbbi.setText(text, scriptIterator.getScriptStart(),
- scriptIterator.getScriptLimit() - scriptIterator.getScriptStart());
- } else {
- rbbi = getBreakIterator(UScript.COMMON);
- rbbi.setText(text, 0, 0);
- }
- }
-
- private BreakIteratorWrapper getBreakIterator(int scriptCode) {
- if (wordBreakers[scriptCode] == null)
- wordBreakers[scriptCode] = BreakIteratorWrapper.wrap(config.getBreakIterator(scriptCode));
- return wordBreakers[scriptCode];
- }
-}