/*
* JBoss, Home of Professional Open Source.
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership. Some portions may be licensed
* to Red Hat, Inc. under one or more contributor license agreements.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA.
*/
package org.teiid.translator.jdbc;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.teiid.core.util.StringUtil;
/**
* Represents a comparable version
*/
public class Version implements Comparable<Version> {
public static Version DEFAULT_VERSION = new Version(new Integer[] {0});
private static final Pattern NUMBER_PATTERN = Pattern.compile("(\\d+)"); //$NON-NLS-1$
private Integer[] parts;
public static Version getVersion(String version) {
if (version == null) {
return null;
}
String[] parts = version.split("\\."); //$NON-NLS-1$
List<Integer> versionParts = new ArrayList<Integer>();
for (String part : parts) {
Integer val = null;
Matcher m = NUMBER_PATTERN.matcher(part);
if (!m.find()) {
continue;
}
String num = m.group(1);
try {
val = Integer.parseInt(num);
} catch (NumberFormatException e) {
}
versionParts.add(val == null ? 0 : val);
}
if (versionParts.isEmpty()) {
return DEFAULT_VERSION;
}
return new Version(versionParts.toArray(new Integer[versionParts.size()]));
}
Version(Integer[] parts) {
this.parts = parts;
}
@Override
public String toString() {
return StringUtil.toString(this.parts, ".", false); //$NON-NLS-1$
}
public int getMajorVersion() {
return parts[0];
}
@Override
public int compareTo(Version o) {
int length = Math.min(this.parts.length, o.parts.length);
for (int i = 0; i < length; i++) {
int comp = this.parts[i].compareTo(o.parts[i]);
if (comp != 0) {
return comp;
}
}
if (this.parts.length > length) {
return 1;
}
if (o.parts.length > length) {
return -1;
}
return 0;
}
@Override
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
if (!(obj instanceof Version)) {
return false;
}
return this.compareTo((Version)obj) == 0;
}
@Override
public int hashCode() {
return Arrays.hashCode(parts);
}
}