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package oracle.toplink.essentials.platform.database;

import java.util.*;
import oracle.toplink.essentials.expressions.*;
import oracle.toplink.essentials.internal.databaseaccess.*;

/**
 * TopLink Platform class which works with Attunity's Connect JDBC driver.
 */
public class AttunityPlatform extends oracle.toplink.essentials.platform.database.DatabasePlatform {
    public AttunityPlatform() {
        // For TEXT and IMAGE fields, streams must be used for binding
        usesStreamsForBinding = true;
        // Autocomit did not work as expected when this class was written.
        supportsAutoCommit = false;
    }

    /**
     * INTERNAL:
     * Create a table which can translate between java types and Attunity Connect data types.
     */
    protected Hashtable buildFieldTypes() {
        Hashtable fieldTypeMapping;

        fieldTypeMapping = new Hashtable();
        fieldTypeMapping.put(Boolean.class, new FieldTypeDefinition("TINYINT", false));

        fieldTypeMapping.put(Integer.class, new FieldTypeDefinition("NUMERIC", 10));
        fieldTypeMapping.put(Long.class, new FieldTypeDefinition("NUMERIC", 19));
        fieldTypeMapping.put(Float.class, new FieldTypeDefinition("NUMERIC", 19, 4));
        fieldTypeMapping.put(Double.class, new FieldTypeDefinition("NUMERIC", 19, 4));
        fieldTypeMapping.put(Short.class, new FieldTypeDefinition("NUMERIC", 5));
        fieldTypeMapping.put(Byte.class, new FieldTypeDefinition("NUMERIC", 3));
        fieldTypeMapping.put(java.math.BigInteger.class, new FieldTypeDefinition("NUMERIC", 38));
        fieldTypeMapping.put(java.math.BigDecimal.class, new FieldTypeDefinition("DOUBLE", false));
        fieldTypeMapping.put(Number.class, new FieldTypeDefinition("DOUBLE", false));

        fieldTypeMapping.put(String.class, new FieldTypeDefinition("VARCHAR", 255));
        fieldTypeMapping.put(Character.class, new FieldTypeDefinition("CHAR", 1));

        fieldTypeMapping.put(Byte[].class, new FieldTypeDefinition("IMAGE", false));
        fieldTypeMapping.put(Character[].class, new FieldTypeDefinition("TEXT", false));
        fieldTypeMapping.put(byte[].class, new FieldTypeDefinition("IMAGE", false));
        fieldTypeMapping.put(char[].class, new FieldTypeDefinition("TEXT", false));        
        fieldTypeMapping.put(java.sql.Blob.class, new FieldTypeDefinition("IMAGE", false));
        fieldTypeMapping.put(java.sql.Clob.class, new FieldTypeDefinition("TEXT", false));
        
        fieldTypeMapping.put(java.sql.Date.class, new FieldTypeDefinition("DATE", false));
        fieldTypeMapping.put(java.sql.Time.class, new FieldTypeDefinition("TIME", false));
        fieldTypeMapping.put(java.sql.Timestamp.class, new FieldTypeDefinition("TIMESTAMP", false));

        return fieldTypeMapping;
    }

    /**
     * INTERNAL:
     * Initialize any platform-specific operators.
     */
    protected void initializePlatformOperators() {
        super.initializePlatformOperators();
        addOperator(ExpressionOperator.simpleTwoArgumentFunction(ExpressionOperator.Concat, "CONCAT"));
    }

    public boolean isAttunity() {
        return true;
    }

    /**
     * INTERNAL:
     * Attunity Connect does not support specifying the primary key in the create table syntax.
     * @return boolean false
     */
    public boolean supportsPrimaryKeyConstraint() {
        return false;
    }

    /**
     * INTERNAL:
     * Attunity Connect does not support creating foreign key constraints with the ALTER TABLE syntax.
     * @return boolean false.
     */
    public boolean supportsForeignKeyConstraints() {
        return false;
    }
}