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package com.sun.xml.ws.transport.tcp.util;

/**
 * @author Alexey Stashok
 */
public final class VersionController {
    
    private static final VersionController instance = new VersionController(
            new Version(1, 0), new Version(1, 0));
    
    private final Version framingVersion;
    private final Version connectionManagementVersion;
    
    private VersionController(final Version framingVersion,
            final Version connectionManagementVersion) {
        this.framingVersion = framingVersion;
        this.connectionManagementVersion = connectionManagementVersion;
    }
    
    public static VersionController getInstance() {
        return instance;
    }
    
    public Version getFramingVersion() {
        return framingVersion;
    }
    
    public Version getConnectionManagementVersion() {
        return connectionManagementVersion;
    }
    
    /**
    *  Method checks compatibility of server and client versions
    */
    public boolean isVersionSupported(final Version framingVersion,
            final Version connectionManagementVersion) {
        
        return this.framingVersion.equals(framingVersion) &&
                this.connectionManagementVersion.equals(connectionManagementVersion);
    }

    /**
    *  Method returns closest to given framing version, which current implementation supports
    */
    public Version getClosestSupportedFramingVersion(Version framingVersion) {
        return this.framingVersion;
    }

    /**
    *  Method returns closest to given connection management version, which current implementation supports
    */
    public Version getClosestSupportedConnectionManagementVersion(Version connectionManagementVersion) {
        return this.connectionManagementVersion;
    }
}