123 lines
3.3 KiB
C++
123 lines
3.3 KiB
C++
#include "JavaVersion.h"
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#include "StringUtils.h"
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#include <QRegularExpression>
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#include <QString>
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JavaVersion & JavaVersion::operator=(const QString & javaVersionString)
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{
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m_string = javaVersionString;
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auto getCapturedInteger = [](const QRegularExpressionMatch & match, const QString &what) -> int
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{
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auto str = match.captured(what);
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if(str.isEmpty())
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{
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return 0;
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}
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return str.toInt();
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};
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QRegularExpression pattern;
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if(javaVersionString.startsWith("1."))
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{
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pattern = QRegularExpression ("1[.](?<major>[0-9]+)([.](?<minor>[0-9]+))?(_(?<security>[0-9]+)?)?(-(?<prerelease>[a-zA-Z0-9]+))?");
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}
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else
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{
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pattern = QRegularExpression("(?<major>[0-9]+)([.](?<minor>[0-9]+))?([.](?<security>[0-9]+))?(-(?<prerelease>[a-zA-Z0-9]+))?");
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}
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auto match = pattern.match(m_string);
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m_parseable = match.hasMatch();
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m_major = getCapturedInteger(match, "major");
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m_minor = getCapturedInteger(match, "minor");
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m_security = getCapturedInteger(match, "security");
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m_prerelease = match.captured("prerelease");
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return *this;
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}
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JavaVersion::JavaVersion(const QString &rhs)
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{
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operator=(rhs);
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}
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QString JavaVersion::toString()
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{
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return m_string;
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}
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bool JavaVersion::requiresPermGen()
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{
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if(m_parseable)
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{
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return m_major < 8;
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}
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return true;
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}
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bool JavaVersion::operator<(const JavaVersion &rhs)
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{
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if(m_parseable && rhs.m_parseable)
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{
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auto major = m_major;
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auto rmajor = rhs.m_major;
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// HACK: discourage using java 9
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if(major > 8)
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major = -major;
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if(rmajor > 8)
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rmajor = -rmajor;
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if(major < rmajor)
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return true;
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if(major > rmajor)
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return false;
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if(m_minor < rhs.m_minor)
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return true;
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if(m_minor > rhs.m_minor)
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return false;
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if(m_security < rhs.m_security)
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return true;
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if(m_security > rhs.m_security)
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return false;
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// everything else being equal, consider prerelease status
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bool thisPre = !m_prerelease.isEmpty();
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bool rhsPre = !rhs.m_prerelease.isEmpty();
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if(thisPre && !rhsPre)
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{
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// this is a prerelease and the other one isn't -> lesser
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return true;
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}
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else if(!thisPre && rhsPre)
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{
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// this isn't a prerelease and the other one is -> greater
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return false;
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}
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else if(thisPre && rhsPre)
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{
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// both are prereleases - use natural compare...
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return StringUtils::naturalCompare(m_prerelease, rhs.m_prerelease, Qt::CaseSensitive) < 0;
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}
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// neither is prerelease, so they are the same -> this cannot be less than rhs
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return false;
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}
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else return StringUtils::naturalCompare(m_string, rhs.m_string, Qt::CaseSensitive) < 0;
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}
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bool JavaVersion::operator==(const JavaVersion &rhs)
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{
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if(m_parseable && rhs.m_parseable)
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{
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return m_major == rhs.m_major && m_minor == rhs.m_minor && m_security == rhs.m_security && m_prerelease == rhs.m_prerelease;
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}
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return m_string == rhs.m_string;
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}
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bool JavaVersion::operator>(const JavaVersion &rhs)
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{
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return (!operator<(rhs)) && (!operator==(rhs));
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}
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