001: /*
002: * $Id: PatternCacheRandom.java,v 1.7 2003/11/07 20:16:24 dfs Exp $
003: *
004: * ====================================================================
005: * The Apache Software License, Version 1.1
006: *
007: * Copyright (c) 2000 The Apache Software Foundation. All rights
008: * reserved.
009: *
010: * Redistribution and use in source and binary forms, with or without
011: * modification, are permitted provided that the following conditions
012: * are met:
013: *
014: * 1. Redistributions of source code must retain the above copyright
015: * notice, this list of conditions and the following disclaimer.
016: *
017: * 2. Redistributions in binary form must reproduce the above copyright
018: * notice, this list of conditions and the following disclaimer in
019: * the documentation and/or other materials provided with the
020: * distribution.
021: *
022: * 3. The end-user documentation included with the redistribution,
023: * if any, must include the following acknowledgment:
024: * "This product includes software developed by the
025: * Apache Software Foundation (http://www.apache.org/)."
026: * Alternately, this acknowledgment may appear in the software itself,
027: * if and wherever such third-party acknowledgments normally appear.
028: *
029: * 4. The names "Apache" and "Apache Software Foundation", "Jakarta-Oro"
030: * must not be used to endorse or promote products derived from this
031: * software without prior written permission. For written
032: * permission, please contact apache@apache.org.
033: *
034: * 5. Products derived from this software may not be called "Apache"
035: * or "Jakarta-Oro", nor may "Apache" or "Jakarta-Oro" appear in their
036: * name, without prior written permission of the Apache Software Foundation.
037: *
038: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
039: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
040: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
041: * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
042: * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
043: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
044: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
045: * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
046: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
047: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
048: * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
049: * SUCH DAMAGE.
050: * ====================================================================
051: *
052: * This software consists of voluntary contributions made by many
053: * individuals on behalf of the Apache Software Foundation. For more
054: * information on the Apache Software Foundation, please see
055: * <http://www.apache.org/>.
056: */
057:
058: package org.apache.oro.text;
059:
060: import java.util.*;
061:
062: import org.apache.oro.text.regex.*;
063: import org.apache.oro.util.*;
064:
065: /**
066: * This class is a GenericPatternCache subclass implementing a random
067: * cache replacement policy. In other words,
068: * patterns are added to the cache until it becomes full. Once the
069: * cache is full, when a new pattern is added to the cache, it replaces
070: * a randomly selected pattern in the cache.
071: *
072: * @version @version@
073: * @since 1.0
074: * @see GenericPatternCache
075: */
076: public final class PatternCacheRandom extends GenericPatternCache {
077:
078: /**
079: * Creates a PatternCacheRandom instance with a given cache capacity
080: * and initialized to use a given PatternCompiler instance as a pattern
081: * compiler.
082: * <p>
083: * @param capacity The capacity of the cache.
084: * @param compiler The PatternCompiler to use to compile patterns.
085: */
086: public PatternCacheRandom(int capacity, PatternCompiler compiler) {
087: super (new CacheRandom(capacity), compiler);
088: }
089:
090: /**
091: * Same as:
092: * <blockquote><pre>
093: * PatternCacheRandom(GenericPatternCache.DEFAULT_CAPACITY, compiler);
094: * </pre></blockquote>
095: */
096: public PatternCacheRandom(PatternCompiler compiler) {
097: this (GenericPatternCache.DEFAULT_CAPACITY, compiler);
098: }
099:
100: /**
101: * Same as:
102: * <blockquote><pre>
103: * PatternCacheRandom(capacity, new Perl5Compiler());
104: * </pre></blockquote>
105: */
106: public PatternCacheRandom(int capacity) {
107: this (capacity, new Perl5Compiler());
108: }
109:
110: /**
111: * Same as:
112: * <blockquote><pre>
113: * PatternCacheRandom(GenericPatternCache.DEFAULT_CAPACITY);
114: * </pre></blockquote>
115: */
116: public PatternCacheRandom() {
117: this(GenericPatternCache.DEFAULT_CAPACITY);
118: }
119:
120: }
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