org.eolang.maven.hash.ChPattern Maven / Gradle / Ivy
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/*
* The MIT License (MIT)
*
* Copyright (c) 2016-2024 Objectionary.com
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package org.eolang.maven.hash;
import java.util.Comparator;
import java.util.LinkedList;
import java.util.List;
import java.util.SortedMap;
import java.util.TreeMap;
import java.util.stream.Stream;
import org.cactoos.iterable.IterableOf;
import org.cactoos.iterable.Mapped;
/**
* Commit Hash pattern.
*
* Returns hash values by particular pattern:
* -DofflineHash=0.*.*:abc2sd3
* -DofflineHash=0.2.7:abc2sd3,0.2.8:s4se2fe
*
* @since 0.28.11
*/
public final class ChPattern implements CommitHash {
/**
* Pattern like *.*.* or 'master'.
*/
private final String pattern;
/**
* Particular tag to match.
*/
private final String tag;
/**
* The main constructor.
*
* @param pattern Pattern like *.*.* or 'master'.
* @param tag Particular tag to match.
*/
public ChPattern(
final String pattern,
final String tag
) {
this.pattern = pattern;
this.tag = tag;
}
@Override
public String value() {
final SortedMap matches = new TreeMap<>(Comparator.reverseOrder());
final Iterable all = new Mapped<>(
Pattern::new,
new IterableOf<>(this.pattern.split(","))
);
for (final Pattern pat : all) {
final int weight = pat.weight(this.tag);
if (weight > 0) {
matches.put(weight, pat.hash);
}
}
final String hash;
if (matches.isEmpty()) {
hash = "";
} else {
hash = matches.get(matches.firstKey());
}
return hash;
}
/**
* The pattern class to check tag.
*
* @since 0.28.11
*/
private static final class Pattern {
/**
* Pattern. e.g. '*.*.*'
*/
private final String template;
/**
* Hash. e.g. 'abcdefg'
*/
private final String hash;
/**
* The main constructor.
*
* @param raw Raw pattern like *.*.*:abcdefg.
*/
private Pattern(final String raw) {
this(raw.split(":"));
}
/**
* The cascade constructor.
*
* @param raw Split pattern like ['*.*.*', 'abcdefg']
*/
private Pattern(final String... raw) {
this(raw[0], raw[1]);
}
/**
* The default constructor.
*
* @param template Pattern like '*.*.*'
* @param hash Hash like 'abcdefg'
*/
private Pattern(final String template, final String hash) {
this.template = template;
this.hash = hash;
}
/**
* How much the tag matches the pattern.
*
* @param tag Tag to compare with.
* @return Weigh - How much the tag matches the pattern.
*/
private int weight(final String tag) {
final int weight;
if (tag.matches(this.regex())) {
weight = 1 + this.numberOfConstants();
} else {
weight = 0;
}
return weight;
}
/**
* Number of constant parts in pattern.
* *.*.* = 0
* 1.*.* = 1
* 1.2.* = 2
* 1.2.3 = 3
*
* @return Number of constant parts in pattern.
*/
private int numberOfConstants() {
return (int) Stream.of(this.template.split("\\."))
.filter(s -> !"*".equals(s)).count();
}
/**
* Creates regex from pattern.
*
* @return Java regex.
*/
private String regex() {
final List keys = new LinkedList<>();
for (final String key : this.template.split("\\.")) {
if ("*".equals(key)) {
keys.add("\\w+");
} else {
keys.add(key);
}
}
return String.join("\\.", keys);
}
}
}