PostgreIndexManager.java

/*
 * DBeaver - Universal Database Manager
 * Copyright (C) 2010-2017 Serge Rider (serge@jkiss.org)
 *
 * 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 org.jkiss.dbeaver.ext.postgresql.edit;

import org.jkiss.code.Nullable;
import org.jkiss.dbeaver.ext.postgresql.model.*;
import org.jkiss.dbeaver.model.edit.DBECommandContext;
import org.jkiss.dbeaver.model.impl.DBObjectNameCaseTransformer;
import org.jkiss.dbeaver.model.impl.DBSObjectCache;
import org.jkiss.dbeaver.model.impl.sql.edit.struct.SQLIndexManager;
import org.jkiss.dbeaver.model.runtime.DBRProgressMonitor;
import org.jkiss.dbeaver.model.struct.DBSEntityAttribute;
import org.jkiss.dbeaver.model.struct.rdb.DBSIndexType;
import org.jkiss.dbeaver.ui.UITask;
import org.jkiss.dbeaver.ui.editors.object.struct.EditIndexPage;
import org.jkiss.utils.CommonUtils;

import java.util.Collections;

/**
 * Postgre index manager
 */
public class PostgreIndexManager extends SQLIndexManager<PostgreIndex, PostgreTableBase> {

    @Nullable
    @Override
    public DBSObjectCache<PostgreSchema, PostgreIndex> getObjectsCache(PostgreIndex object)
    {
        return object.getTable().getContainer().indexCache;
    }

    @Override
    protected PostgreIndex createDatabaseObject(
        DBRProgressMonitor monitor, DBECommandContext context, final PostgreTableBase parent,
        Object from)
    {
        return new UITask<PostgreIndex>() {
            @Override
            protected PostgreIndex runTask() {
                EditIndexPage editPage = new EditIndexPage(
                    "Edit index",
                    parent,
                    Collections.singletonList(DBSIndexType.OTHER));
                if (!editPage.edit()) {
                    return null;
                }

                StringBuilder idxName = new StringBuilder(64);
                idxName.append(CommonUtils.escapeIdentifier(parent.getName()));
                final PostgreIndex index = new PostgreIndex(
                    parent,
                    idxName.toString(),
                    editPage.getIndexType(),
                    editPage.isUnique());
                int colIndex = 1;
                for (DBSEntityAttribute tableColumn : editPage.getSelectedAttributes()) {
                    if (colIndex == 1) {
                        idxName.append("_").append(CommonUtils.escapeIdentifier(tableColumn.getName())); //$NON-NLS-1$
                    }
                    index.addColumn(
                        new PostgreIndexColumn(
                            index,
                            (PostgreAttribute) tableColumn,
                            null,
                            colIndex++,
                            !Boolean.TRUE.equals(editPage.getAttributeProperty(tableColumn, EditIndexPage.PROP_DESC)),
                            false));
                }
                idxName.append("_IDX"); //$NON-NLS-1$
                index.setName(DBObjectNameCaseTransformer.transformObjectName(index, idxName.toString()));
                return index;
            }
        }.execute();
    }

    @Override
    protected String getDropIndexPattern(PostgreIndex index)
    {
        return "DROP INDEX " + PATTERN_ITEM_INDEX; //$NON-NLS-1$
    }

}