Examples of org.eclipse.persistence.internal.databaseaccess.DatasourcePlatform

Package org.eclipse.persistence.internal.databaseaccess

Examples of org.eclipse.persistence.internal.databaseaccess.DatasourcePlatform

org.eclipse.persistence.internal.databaseaccess.DatasourcePlatform
DatasourcePlatform is private to TopLink. It encapsulates behavior specific to a datasource platform (eg. Oracle, Sybase, DB2, Attunity, MQSeries), and provides protocol for TopLink to access this behavior. @see DatabasePlatform @see org.eclipse.persistence.eis.EISPlatform @since OracleAS TopLink 10g (10.0.3)

    /**
     * PUBLIC:
     * Create a new login.
     */
    public DatasourceLogin() {
        this(new DatasourcePlatform());
    }

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     * Return the datasource platform specific information.
     * This allows EclipseLink to configure certain advanced features for the datasource desired.
     */
    public Platform getDatasourcePlatform() {
        if (this.platform == null) {
            this.platform = new DatasourcePlatform();
        }
        return platform;
    }

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        }
        Class platformClass = null;
        try {
            //First try loading with the Login's class loader
            platformClass = this.getClass().getClassLoader().loadClass(platformClassName);
            DatasourcePlatform platform = null;
            if (PrivilegedAccessHelper.shouldUsePrivilegedAccess()){
                try {
                    platform = (DatasourcePlatform)AccessController.doPrivileged(new PrivilegedNewInstanceFromClass(platformClass));
                } catch (PrivilegedActionException exception) {
                    throw exception.getException();

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    /**
     * Adds descriptors plus sequencing info found on the project to the session.
     */
    protected void addProjectToSession(ServerSession session, Project project) {
        DatasourcePlatform sessionPlatform = (DatasourcePlatform)session.getDatasourceLogin().getDatasourcePlatform();
        DatasourcePlatform projectPlatform = (DatasourcePlatform)project.getDatasourceLogin().getDatasourcePlatform();
        if (!sessionPlatform.hasDefaultSequence() && projectPlatform.hasDefaultSequence()) {
            sessionPlatform.setDefaultSequence(projectPlatform.getDefaultSequence());
        }
        if ((sessionPlatform.getSequences() == null) || sessionPlatform.getSequences().isEmpty()) {
            if ((projectPlatform.getSequences() != null) && !projectPlatform.getSequences().isEmpty()) {
                sessionPlatform.setSequences(projectPlatform.getSequences());
            }
        } else {
            if ((projectPlatform.getSequences() != null) && !projectPlatform.getSequences().isEmpty()) {
                Iterator itProjectSequences = projectPlatform.getSequences().values().iterator();
                while (itProjectSequences.hasNext()) {
                    Sequence sequence = (Sequence)itProjectSequences.next();
                    if (!sessionPlatform.getSequences().containsKey(sequence.getName())) {
                        sessionPlatform.addSequence(sequence);
                    }

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    /**
     * Adds descriptors plus sequencing info found on the project to the session.
     */
    protected void addProjectToSession(ServerSession session, Project project) {
        DatasourcePlatform sessionPlatform = (DatasourcePlatform)session.getDatasourceLogin().getDatasourcePlatform();
        DatasourcePlatform projectPlatform = (DatasourcePlatform)project.getDatasourceLogin().getDatasourcePlatform();
        if (!sessionPlatform.hasDefaultSequence() && projectPlatform.hasDefaultSequence()) {
            sessionPlatform.setDefaultSequence(projectPlatform.getDefaultSequence());
        }
        if ((sessionPlatform.getSequences() == null) || sessionPlatform.getSequences().isEmpty()) {
            if ((projectPlatform.getSequences() != null) && !projectPlatform.getSequences().isEmpty()) {
                sessionPlatform.setSequences(projectPlatform.getSequences());
            }
        } else {
            if ((projectPlatform.getSequences() != null) && !projectPlatform.getSequences().isEmpty()) {
                Iterator itProjectSequences = projectPlatform.getSequences().values().iterator();
                while (itProjectSequences.hasNext()) {
                    Sequence sequence = (Sequence)itProjectSequences.next();
                    if (!sessionPlatform.getSequences().containsKey(sequence.getName())) {
                        sessionPlatform.addSequence(sequence);
                    }

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    /**
     * INTERNAL:
     */
    @Override
    public void onConnect() {
        DatasourcePlatform platform = (DatasourcePlatform)getDatasourcePlatform();
        // Set shouldAcquireValueAfterInsert flag: identity -> true; sequence objects -> false.
        if (platform.supportsIdentity() && shouldUseIdentityIfPlatformSupports()) {
            // identity is both supported by platform and desired by the NativeSequence
            setShouldAcquireValueAfterInsert(true);
        } else if (platform.supportsSequenceObjects() && !shouldUseIdentityIfPlatformSupports()) {
            // sequence objects is both supported by platform and desired by the NativeSequence
            setShouldAcquireValueAfterInsert(false);
        } else {
            if (platform.getDefaultNativeSequenceToTable() || !platform.supportsNativeSequenceNumbers()) {
                // If native sequencing is not supported, or IDENTITY not desire, use TABLE.
                this.delegateSequence = new TableSequence();
                this.delegateSequence.setName(getName());
                this.delegateSequence.onConnect(platform);
                setShouldUseTransaction(this.delegateSequence.shouldUseTransaction());
                setShouldAcquireValueAfterInsert(this.delegateSequence.shouldAcquireValueAfterInsert());
                setShouldSkipUpdate(this.delegateSequence.shouldSkipUpdate());
                setShouldSelectBeforeUpdate(this.delegateSequence.shouldSelectBeforeUpdate());
                setUpdateQuery(this.delegateSequence.getUpdateQuery());
                super.onConnect();
                return;
            } else {
                // platform support contradicts to NativeSequence setting - go with platform supported choice.
                // platform must support either identity or sequence objects (otherwise ValidationException would've been thrown earlier),
                // therefore here dbPlatform.supportsIdentity() == !dbPlatform.supportsSequenceObjects().
                setShouldAcquireValueAfterInsert(platform.supportsIdentity());
            }
        }
        setShouldUseTransaction(platform.shouldNativeSequenceUseTransaction());
        super.onConnect();
    }

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    /**
     * Adds descriptors plus sequencing info found on the project to the session.
     */
    protected void addProjectToSession(ServerSession session, Project project) {
        DatasourcePlatform sessionPlatform = (DatasourcePlatform)session.getDatasourceLogin().getDatasourcePlatform();
        DatasourcePlatform projectPlatform = (DatasourcePlatform)project.getDatasourceLogin().getDatasourcePlatform();
        if (!sessionPlatform.hasDefaultSequence() && projectPlatform.hasDefaultSequence()) {
            sessionPlatform.setDefaultSequence(projectPlatform.getDefaultSequence());
        }
        if ((sessionPlatform.getSequences() == null) || sessionPlatform.getSequences().isEmpty()) {
            if ((projectPlatform.getSequences() != null) && !projectPlatform.getSequences().isEmpty()) {
                sessionPlatform.setSequences(projectPlatform.getSequences());
            }
        } else {
            if ((projectPlatform.getSequences() != null) && !projectPlatform.getSequences().isEmpty()) {
                Iterator itProjectSequences = projectPlatform.getSequences().values().iterator();
                while (itProjectSequences.hasNext()) {
                    Sequence sequence = (Sequence)itProjectSequences.next();
                    if (!sessionPlatform.getSequences().containsKey(sequence.getName())) {
                        sessionPlatform.addSequence(sequence);
                    }

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    /**
     * PUBLIC:
     * Create a new login.
     */
    public DatasourceLogin() {
        this(new DatasourcePlatform());
    }

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     * Return the datasource platform specific information.
     * This allows EclipseLink to configure certain advanced features for the datasource desired.
     */
    public Platform getDatasourcePlatform() {
        if (this.platform == null) {
            this.platform = new DatasourcePlatform();
        }
        return platform;
    }

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        }
        Class platformClass = null;
        try {
            //First try loading with the Login's class loader
            platformClass = this.getClass().getClassLoader().loadClass(platformClassName);
            DatasourcePlatform platform = null;
            if (PrivilegedAccessHelper.shouldUsePrivilegedAccess()){
                try {
                    platform = (DatasourcePlatform)AccessController.doPrivileged(new PrivilegedNewInstanceFromClass(platformClass));
                } catch (PrivilegedActionException exception) {
                    throw exception.getException();

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Related Classes of org.eclipse.persistence.internal.databaseaccess.DatasourcePlatform

org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl

org.eclipse.persistence.sequencing.NativeSequence

org.eclipse.persistence.sessions.DatasourceLogin

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