com.jn.sqlhelper.dialect.internal.limit.LimitOnlyLimitHandler Maven / Gradle / Ivy

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/*
 * Copyright 2019 the original author or authors.
 *
 * Licensed under the LGPL, Version 3.0 (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.gnu.org/licenses/lgpl-3.0.html
 *
 * 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 com.jn.sqlhelper.dialect.internal.limit;

import com.jn.sqlhelper.dialect.pagination.RowSelection;

/**
 * select *
 * from table
 * where xxx
 * limit ?
 */
public class LimitOnlyLimitHandler extends AbstractLimitHandler {
    @Override
    public String processSql(String sql,boolean isSubquery, boolean useLimitVariable, RowSelection rowSelection) {
        return getLimitString(sql,isSubquery,useLimitVariable, LimitHelper.getFirstRow(rowSelection), getMaxOrLimit(rowSelection));
    }

    @Override
    protected String getLimitString(String sql,boolean isSubquery, boolean useLimitVariable, long offset, int limit) {
        if (useLimitVariable && getDialect().isUseLimitInVariableMode(isSubquery)) {
            return sql + " limit ?";
        } else {
            return sql + " limit " + limit;
        }
    }
}