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

Package org.eclipse.persistence.internal.databaseaccess

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

org.eclipse.persistence.internal.databaseaccess.DatabasePlatform
DatabasePlatform is private to EclipseLink. It encapsulates behavior specific to a database platform (eg. Oracle, Sybase, DBase), and provides protocol for EclipseLink to access this behavior. The behavior categories which require platform specific handling are SQL generation and sequence behavior. While database platform currently provides sequence number retrieval behavior, this will move to a sequence manager (when it is implemented). @see AccessPlatform @see DB2Platform @see DBasePlatform @see OraclePlatform @see SybasePlatform @since TOPLink/Java 1.0

    /**
     * Print the argument and its type.
     */
    protected void printOutputArgument(FieldDefinition argument, Writer writer, AbstractSession session) throws ValidationException {
        try {
            DatabasePlatform platform = session.getPlatform();
            FieldTypeDefinition fieldType;
            if (argument.getType() != null) {
                fieldType = platform.getFieldTypeDefinition(argument.getType());
                if (fieldType == null) {
                    throw ValidationException.javaTypeIsNotAValidDatabaseType(argument.getType());
                }
            } else {
                fieldType = new FieldTypeDefinition(argument.getTypeName());
            }
            writer.write(platform.getProcedureArgumentString());
            if (platform.shouldPrintOutputTokenAtStart()) {
                writer.write(" " + platform.getCreationOutputProcedureToken() + " ");
            }
            writer.write(argument.getName());
            if ((!platform.shouldPrintOutputTokenAtStart()) && platform.shouldPrintOutputTokenBeforeType()) {
                writer.write(" " + platform.getCreationOutputProcedureToken());
            }
            writer.write(" " + fieldType.getName());
            if (fieldType.isSizeAllowed() && platform.allowsSizeInProcedureArguments() && ((argument.getSize() != 0) || (fieldType.isSizeRequired()))) {
                writer.write("(");
                if (argument.getSize() == 0) {
                    writer.write(new Integer(fieldType.getDefaultSize()).toString());
                } else {
                    writer.write(new Integer(argument.getSize()).toString());
                }
                if (argument.getSubSize() != 0) {
                    writer.write(",");
                    writer.write(new Integer(argument.getSubSize()).toString());
                } else if (fieldType.getDefaultSubSize() != 0) {
                    writer.write(",");
                    writer.write(new Integer(fieldType.getDefaultSubSize()).toString());
                }
                writer.write(")");
            }
            if ((!platform.shouldPrintOutputTokenAtStart()) && !platform.shouldPrintOutputTokenBeforeType()) {
                writer.write(" " + platform.getCreationOutputProcedureToken());
            }
        } catch (IOException ioException) {
            throw ValidationException.fileError(ioException);
        }
    }

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    /**
    * INTERNAL:
    */
    public void onConnect() {
        DatabasePlatform dbPlatform = null;
        try {
            dbPlatform = (DatabasePlatform)getDatasourcePlatform();
        } catch (ClassCastException ex) {
            if (getSelectQuery() == null) {
                throw ValidationException.platformDoesNotSupportSequence(getName(), Helper.getShortClassName(getDatasourcePlatform()), Helper.getShortClassName(this));
            }
        }
        if (!dbPlatform.supportsNativeSequenceNumbers() && (getSelectQuery() == null)) {
            throw ValidationException.platformDoesNotSupportSequence(getName(), Helper.getShortClassName(getDatasourcePlatform()), Helper.getShortClassName(this));
        }
        // Set shouldAcquireValueAfterInsert flag: identity -> true; sequence objects -> false.
        if(dbPlatform.supportsIdentity() && shouldUseIdentityIfPlatformSupports()) {
            // identity is both supported by platform and desired by the NativeSequence
            setShouldAcquireValueAfterInsert(true);
        } else if(dbPlatform.supportsSequenceObjects() && !shouldUseIdentityIfPlatformSupports()) {
            // sequence objects is both supported by platform and desired by the NativeSequence
            setShouldAcquireValueAfterInsert(false);
        } else {
            if(dbPlatform.supportsNativeSequenceNumbers()) {
                // 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(dbPlatform.supportsIdentity());
            }
        }
        setShouldUseTransaction(dbPlatform.shouldNativeSequenceUseTransaction());
        super.onConnect();
    }

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     * Bug 2804663 - Each DatabaseAccessor will now hold on to its own instance
     * of this class, hence a singleton pattern is not applicable.
     */
    public LOBValueWriter(Accessor accessor) {
        this.accessor = accessor;
        DatabasePlatform platform = ((DatabaseAccessor)accessor).getPlatform();
        this.isNativeConnectionRequired = platform.isOracle() && ((OraclePlatform)platform).isNativeConnectionRequiredForLobLocator(); 
    }

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                boolean quickAdd = (domainObjects instanceof Collection) && !this.hasWrapperPolicy;
                ResultSetMetaData metaData = resultSet.getMetaData();
                ResultSetRecord row = null;
                AbstractSession executionSession = query.getExecutionSession();
                DatabaseAccessor dbAccessor = (DatabaseAccessor)query.getAccessor();
                DatabasePlatform platform = dbAccessor.getPlatform();
                boolean optimizeData = platform.shouldOptimizeDataConversion();
                if (this.isSimple) {
                    // None of the fields are relational - the row could be reused, just clear all the values.
                    row = new SimpleResultSetRecord(fields, fieldsArray, resultSet, metaData, dbAccessor, executionSession, platform, optimizeData);
                    if (this.descriptor.isDescriptorTypeAggregate()) {
                        // Aggregate Collection may have an unmapped primary key referencing the owner, the corresponding field will not be used when the object is populated and therefore may not be cleared.

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    /**
     * INTERNAL: Return the create table statement.
     */
    public Writer buildCreationWriter(AbstractSession session, Writer writer) throws ValidationException {
        try {
            DatabasePlatform platform = session.getPlatform();
            writer.write(getCreationHeader() + getFullName());
            if (getArguments().size() > getFirstArgumentIndex() || platform.requiresProcedureBrackets()) {
                writer.write(" (");
            }
            writer.write("\n");
            for (int i = getFirstArgumentIndex(); i < getArguments().size(); i++) {
                writer.write("\t");
                FieldDefinition argument = (FieldDefinition)getArguments().elementAt(i);
                Integer argumentType = (Integer)getArgumentTypes().elementAt(i);
                if (argumentType == IN) {
                    printArgument(argument, writer, session);
                } else if (argumentType == OUT) {
                    printOutputArgument(argument, writer, session);
                } else if (argumentType == INOUT) {
                    printInOutputArgument(argument, writer, session);
                }
                if (i < (getArguments().size() - 1)) {
                    writer.write(",\n");
                }
            }
            if (getArguments().size() > getFirstArgumentIndex() || platform.requiresProcedureBrackets()) {
                writer.write(")");
            }


            printReturn(writer, session);
            writer.write(platform.getProcedureAsString());
            writer.write("\n");
            
            if (platform.shouldPrintStoredProcedureVariablesAfterBeginString()) {
                writer.write(platform.getProcedureBeginString());
                writer.write("\n");
            }
            
            if (!getVariables().isEmpty()) {
                writer.write("DECLARE\n");
            }


            for (Enumeration variablesEnum = getVariables().elements();
                     variablesEnum.hasMoreElements();) {
                FieldDefinition field = (FieldDefinition)variablesEnum.nextElement();
                writer.write("\t");
                writer.write(field.getName());
                writer.write(" ");
                writer.write(field.getTypeName());
                writer.write(platform.getBatchDelimiterString());
                writer.write("\n");
            }
            
            if (!platform.shouldPrintStoredProcedureVariablesAfterBeginString()) {
                writer.write(platform.getProcedureBeginString());
                writer.write("\n");
            }


            for (Enumeration statementsEnum = getStatements().elements();
                     statementsEnum.hasMoreElements();) {
                writer.write((String)statementsEnum.nextElement());
                writer.write(platform.getBatchDelimiterString());
                writer.write("\n");
            }
            writer.write(platform.getProcedureEndString());
        } catch (IOException ioException) {
            throw ValidationException.fileError(ioException);
        }
        return writer;
    }

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    /**
     * Print the argument and its type.
     */
    protected void printArgument(FieldDefinition argument, Writer writer, AbstractSession session) throws IOException {
        DatabasePlatform platform = session.getPlatform();
        FieldTypeDefinition fieldType;
        if (argument.getType() != null) {
            fieldType = platform.getFieldTypeDefinition(argument.getType());
            if (fieldType == null) {
                throw ValidationException.javaTypeIsNotAValidDatabaseType(argument.getType());
            }
        } else {
            fieldType = new FieldTypeDefinition(argument.getTypeName());
        }
        writer.write(platform.getProcedureArgumentString());
        
        if (platform.shouldPrintInputTokenAtStart()) {
            writer.write(" ");
            writer.write(platform.getInputProcedureToken());
            writer.write(" ");
        }
        
        writer.write(argument.getName());
        writer.write(" ");
        writer.write(fieldType.getName());


        if (fieldType.isSizeAllowed() && platform.allowsSizeInProcedureArguments() && ((argument.getSize() != 0) || (fieldType.isSizeRequired()))) {
            writer.write("(");
            if (argument.getSize() == 0) {
                writer.write(Integer.valueOf(fieldType.getDefaultSize()).toString());
            } else {
                writer.write(Integer.valueOf(argument.getSize()).toString());

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    /**
     * Print the argument and its type.
     */
    protected void printInOutputArgument(FieldDefinition argument, Writer writer, AbstractSession session) throws ValidationException {
        try {
            DatabasePlatform platform = session.getPlatform();
            FieldTypeDefinition fieldType;
            if (argument.getType() != null) {
                fieldType = platform.getFieldTypeDefinition(argument.getType());
                if (fieldType == null) {
                    throw ValidationException.javaTypeIsNotAValidDatabaseType(argument.getType());
                }
            } else {
                fieldType = new FieldTypeDefinition(argument.getTypeName());
            }
            writer.write(platform.getProcedureArgumentString());            
            if (platform.shouldPrintOutputTokenAtStart()) {
                writer.write(" " + platform.getCreationInOutputProcedureToken() + " ");
            }
            writer.write(argument.getName());
            if ((!platform.shouldPrintOutputTokenAtStart()) && platform.shouldPrintOutputTokenBeforeType()) {
                writer.write(" " + platform.getCreationInOutputProcedureToken());
            }
            writer.write(" " + fieldType.getName());
            if (fieldType.isSizeAllowed() && platform.allowsSizeInProcedureArguments() && ((argument.getSize() != 0) || (fieldType.isSizeRequired()))) {
                writer.write("(");
                if (argument.getSize() == 0) {
                    writer.write(Integer.valueOf(fieldType.getDefaultSize()).toString());
                } else {
                    writer.write(Integer.valueOf(argument.getSize()).toString());
                }
                if (argument.getSubSize() != 0) {
                    writer.write(",");
                    writer.write(Integer.valueOf(argument.getSubSize()).toString());
                } else if (fieldType.getDefaultSubSize() != 0) {
                    writer.write(",");
                    writer.write(Integer.valueOf(fieldType.getDefaultSubSize()).toString());
                }
                writer.write(")");
            }
            if ((!platform.shouldPrintOutputTokenAtStart()) && (!platform.shouldPrintOutputTokenBeforeType())) {
                writer.write(" " + platform.getCreationInOutputProcedureToken());
            }
        } catch (IOException ioException) {
            throw ValidationException.fileError(ioException);
        }
    }

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    /**
     * Print the argument and its type.
     */
    protected void printOutputArgument(FieldDefinition argument, Writer writer, AbstractSession session) throws ValidationException {
        try {
            DatabasePlatform platform = session.getPlatform();
            FieldTypeDefinition fieldType;
            if (argument.getType() != null) {
                fieldType = platform.getFieldTypeDefinition(argument.getType());
                if (fieldType == null) {
                    throw ValidationException.javaTypeIsNotAValidDatabaseType(argument.getType());
                }
            } else {
                fieldType = new FieldTypeDefinition(argument.getTypeName());
            }
            writer.write(platform.getProcedureArgumentString());
            if (platform.shouldPrintOutputTokenAtStart()) {
                writer.write(" " + platform.getCreationOutputProcedureToken() + " ");
            }
            writer.write(argument.getName());
            if ((!platform.shouldPrintOutputTokenAtStart()) && platform.shouldPrintOutputTokenBeforeType()) {
                writer.write(" " + platform.getCreationOutputProcedureToken());
            }
            writer.write(" " + fieldType.getName());
            if (fieldType.isSizeAllowed() && platform.allowsSizeInProcedureArguments() && ((argument.getSize() != 0) || (fieldType.isSizeRequired()))) {
                writer.write("(");
                if (argument.getSize() == 0) {
                    writer.write(Integer.valueOf(fieldType.getDefaultSize()).toString());
                } else {
                    writer.write(Integer.valueOf(argument.getSize()).toString());
                }
                if (argument.getSubSize() != 0) {
                    writer.write(",");
                    writer.write(Integer.valueOf(argument.getSubSize()).toString());
                } else if (fieldType.getDefaultSubSize() != 0) {
                    writer.write(",");
                    writer.write(Integer.valueOf(fieldType.getDefaultSubSize()).toString());
                }
                writer.write(")");
            }
            if ((!platform.shouldPrintOutputTokenAtStart()) && !platform.shouldPrintOutputTokenBeforeType()) {
                writer.write(" " + platform.getCreationOutputProcedureToken());
            }
        } catch (IOException ioException) {
            throw ValidationException.fileError(ioException);
        }
    }

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     * Bug 2804663 - Each DatabaseAccessor will now hold on to its own instance
     * of this class, hence a singleton pattern is not applicable.
     */
    public LOBValueWriter(Accessor accessor) {
        this.accessor = accessor;
        DatabasePlatform platform = ((DatabaseAccessor)accessor).getPlatform();
        this.isNativeConnectionRequired = platform.isOracle() && ((OraclePlatform)platform).isNativeConnectionRequiredForLobLocator(); 
    }

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     * Bug 2804663 - Each DatabaseAccessor will now hold on to its own instance
     * of this class, hence a singleton pattern is not applicable.
     */
    public LOBValueWriter(Accessor accessor) {
        this.accessor = accessor;
        DatabasePlatform platform = ((DatabaseAccessor)accessor).getPlatform();
        this.isNativeConnectionRequired = platform.isOracle() && ((OraclePlatform)platform).isNativeConnectionRequiredForLobLocator(); 
    }

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

org.eclipse.persistence.descriptors.ClassDescriptor

org.eclipse.persistence.internal.descriptors.ObjectBuilder

org.eclipse.persistence.internal.helper.DatabaseField

org.eclipse.persistence.internal.helper.DatabaseTable

org.eclipse.persistence.internal.helper.LOBValueWriter

org.eclipse.persistence.internal.sessions.AbstractRecord

org.eclipse.persistence.mappings.structures.ObjectRelationalDatabaseField

org.eclipse.persistence.platform.database.converters.StructConverter

org.eclipse.persistence.sequencing.NativeSequence

org.eclipse.persistence.sequencing.Sequence

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