corner.migration.services.impl.fragment.AbstractMigrateFragment.java Source code

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Here is the source code for corner.migration.services.impl.fragment.AbstractMigrateFragment.java

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/* 
 * Copyright 2009 The Corner Team.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package corner.migration.services.impl.fragment;

import org.hibernate.cfg.Environment;
import org.hibernate.dialect.Dialect;
import org.hibernate.engine.Mapping;
import org.hibernate.engine.SessionFactoryImplementor;
import org.hibernate.mapping.Column;
import org.hibernate.mapping.Table;

import corner.migration.services.ConnectionAdapter;
import corner.migration.services.MigrateFragment;

/**
 * ??
 * @author <a href="jun.tsai@ganshane.net">Jun Tsai</a>
 * @version $Revision$
 * @since 0.0.2
 */
abstract class AbstractMigrateFragment implements MigrateFragment {
    private Dialect dialect;
    private SessionFactoryImplementor sessionFactory;
    private String tableName;
    private ConnectionAdapter adapter;

    static final String defaultCatalog = Environment.getProperties().getProperty(Environment.DEFAULT_CATALOG);
    static final String defaultSchema = Environment.getProperties().getProperty(Environment.DEFAULT_SCHEMA);

    public AbstractMigrateFragment(ConnectionAdapter adapter, Dialect dialect,
            SessionFactoryImplementor sessionFactory, String tableName) {
        this.dialect = dialect;
        this.sessionFactory = sessionFactory;
        this.tableName = tableName;
        this.adapter = adapter;
    }

    @Override
    public boolean filteTable(Table table) {
        String tableName = getQualifiedTableName(table);
        return tableName.equalsIgnoreCase(getTableName());
    }

    protected String getQualifiedTableName(Table table) {
        return table.getQualifiedName(dialect, defaultCatalog, defaultSchema);
    }

    /**
     * @return the dialect
     */
    public Dialect getDialect() {
        return dialect;
    }

    /**
     * @return the sessionFactory
     */
    public SessionFactoryImplementor getSessionFactory() {
        return sessionFactory;
    }

    protected ConnectionAdapter getConnectionAdapter() {
        return this.adapter;
    }

    /**
     * @return the tableName
     */
    public String getTableName() {
        return tableName;
    }

    /**
     * ?SQL
     * @param col 
     * @return SQL 
     * @see Table#sqlCreateString(Dialect, Mapping, String, String)
     */
    protected String getSQLType(Column col) {
        //      boolean identityColumn = idValue != null && idValue.isIdentityColumn( dialect );
        boolean identityColumn = false;
        StringBuffer buf = new StringBuffer();
        Dialect dialect = getDialect();
        Mapping p = this.getSessionFactory();
        buf.append(col.getQuotedName(dialect)).append(' ');

        String pkname = "id";
        if (identityColumn && col.getQuotedName(dialect).equals(pkname)) {
            // to support dialects that have their own identity data type
            if (dialect.hasDataTypeInIdentityColumn()) {
                buf.append(col.getSqlType(dialect, p));
            }
            buf.append(' ').append(dialect.getIdentityColumnString(col.getSqlTypeCode(p)));
        } else {

            buf.append(col.getSqlType(dialect, p));

            String defaultValue = col.getDefaultValue();
            if (defaultValue != null) {
                buf.append(" default ").append(defaultValue);
            }

            if (col.isNullable()) {
                buf.append(dialect.getNullColumnString());
            } else {
                buf.append(" not null");
            }

        }

        boolean useUniqueConstraint = col.isUnique() && (!col.isNullable() || dialect.supportsNotNullUnique());
        if (useUniqueConstraint) {
            if (dialect.supportsUnique()) {
                buf.append(" unique");
            } else {
                //               UniqueKey uk = getOrCreateUniqueKey( col.getQuotedName( dialect ) + '_' );
                //               uk.addColumn( col );
            }
        }

        if (col.hasCheckConstraint() && dialect.supportsColumnCheck()) {
            buf.append(" check (").append(col.getCheckConstraint()).append(")");
        }

        String columnComment = col.getComment();
        if (columnComment != null) {
            buf.append(dialect.getColumnComment(columnComment));
        }
        return buf.toString();
    }
}