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Viewing changes to core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/parser/util/ContentAssistMatcherFactory.java

  • Committer: Package Import Robot
  • Author(s): Jakub Adam
  • Date: 2011-10-06 21:15:04 UTC
  • mfrom: (1.1.4)
  • Revision ID: package-import@ubuntu.com-20111006211504-8dutmljjih0zikfv
Tags: 8.0.1-1
* New upstream release.
* Split the JNI packages into a separate architecture dependent
  package and made eclipse-cdt architecture independent.
* Install JNI libraries into multiarch aware location
* Bumped Standards-Version to 3.9.2.

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core/org.eclipse.cdt.core/parser/org/eclipse/cdt/internal/core/parser/util/ContentAssistMatcherFactory.java
 
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/*******************************************************************************
 
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 * Copyright (c) 2011 Jens Elmenthaler and others
 
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 * All rights reserved. This program and the accompanying materials
 
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 * are made available under the terms of the Eclipse Public License v1.0
 
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 * which accompanies this distribution, and is available at
 
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 * http://www.eclipse.org/legal/epl-v10.html
 
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 *
 
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 * Contributors:
 
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 *     Jens Elmenthaler - http://bugs.eclipse.org/173458 (camel case completion)
 
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 *     IBM Corporation
 
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 *******************************************************************************/
 
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package org.eclipse.cdt.internal.core.parser.util;
 
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import org.eclipse.cdt.core.parser.util.CharArrayUtils;
 
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import org.eclipse.cdt.core.parser.util.IContentAssistMatcher;
 
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import org.eclipse.cdt.core.parser.util.SegmentMatcher;
 
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/**
 
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 * The facade to the pattern matching algorithms of content assist.
 
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 *  
 
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 * @author Jens Elmenthaler
 
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 * 
 
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 * @noextend This class is not intended to be subclassed by clients.
 
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 * @since 5.3
 
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 */
 
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public class ContentAssistMatcherFactory {
 
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        private static ContentAssistMatcherFactory instance = null;
 
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        private boolean showCamelCaseMatches = true;
 
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        private static class CamelCaseMatcher implements IContentAssistMatcher {
 
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                private final SegmentMatcher matcher;
 
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                public CamelCaseMatcher(char[] pattern) {
 
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                        matcher = new SegmentMatcher(pattern);
 
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                }
 
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                public char[] getPrefixForBinarySearch() {
 
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                        return matcher.getPrefixForBinarySearch();
 
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                }
 
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                public boolean matchRequiredAfterBinarySearch() {
 
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                        return matcher.matchRequiredAfterBinarySearch();
 
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                }
 
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                public boolean match(char[] name) {
 
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                        return matcher.match(name);
 
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                }
 
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        }
 
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        private static class PrefixMatcher implements IContentAssistMatcher {
 
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                private final char[] prefix;
 
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                public PrefixMatcher(char[] prefix) {
 
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                        this.prefix = prefix;
 
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                }
 
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                public char[] getPrefixForBinarySearch() {
 
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                        return prefix;
 
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                }
 
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                public boolean matchRequiredAfterBinarySearch() {
 
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                        return false;
 
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                }
 
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                public boolean match(char[] name) {
 
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                        return CharArrayUtils.equals(name, 0, prefix.length, prefix, true);
 
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                }
 
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        }
 
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        private ContentAssistMatcherFactory() {
 
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        }
 
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        public static synchronized ContentAssistMatcherFactory getInstance() {
 
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                if (instance == null) {
 
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                        instance = new ContentAssistMatcherFactory();
 
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                }
 
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                return instance;
 
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        }
 
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        /**
 
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     * This function is not supposed to be called from any functions except
 
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     * for ContentAssistMatcherPreference.updateOnPreferences.
 
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     *  
 
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     * @param showCamelCaseMatches
 
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     */
 
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        public synchronized  void setShowCamelCaseMatches(boolean showCamelCaseMatches) {
 
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                this.showCamelCaseMatches = showCamelCaseMatches;
 
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        }
 
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        /**
 
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         * 
 
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         * @return <code>true</code> if showCamelCaseMatches is set from the content assist preference page.
 
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         */
 
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        public boolean getShowCamelCaseMatches() {
 
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                return showCamelCaseMatches;
 
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        }
 
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        /**
 
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         * @param pattern The pattern for which to create a matcher.
 
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         * @return A suitable matcher.
 
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         */
 
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        public synchronized IContentAssistMatcher createMatcher(char[] pattern) {
 
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                return showCamelCaseMatches ? new CamelCaseMatcher(pattern) : new PrefixMatcher(pattern);
 
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        }
 
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        /**
 
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         * @param pattern The pattern for which to create a matcher.
 
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         * @return A suitable matcher.
 
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         */
 
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        public IContentAssistMatcher createMatcher(String pattern) {
 
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                return createMatcher(pattern.toCharArray());
 
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        }
 
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        /**
 
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         * A helper method to match a name against the pattern typed by the user.
 
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         * If you need to match many names at once against the same pattern, use
 
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         * {@link #createMatcher(char[])} and re-use the returned matcher instead.  
 
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         * 
 
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         * @param pattern The user provided pattern.
 
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         * @param name The name to match against the pattern.
 
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         * 
 
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         * @return <code>true</code> if the name matches the given pattern.
 
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         */
 
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        public boolean match(char[] pattern, char[] name) {
 
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                return createMatcher(pattern).match(name);
 
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        }
 
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}