dubbo Page 源码
dubbo Page 代码
文件路径：/dubbo-common/src/main/java/org/apache/dubbo/common/utils/Page.java
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.dubbo.common.utils;
import java.util.List;
/**
* The model class of pagination
*
* @since 2.7.5
*/
public interface Page<T> {
/**
* Gets the offset of request
*
* @return positive integer
*/
int getOffset();
/**
* Gets the size of request for pagination query
*
* @return positive integer
*/
int getPageSize();
/**
* Gets the total amount of elements.
*
* @return the total amount of elements
*/
int getTotalSize();
/**
* Get the number of total pages.
*
* @return the number of total pages.
*/
int getTotalPages();
/**
* The data of current page
*
* @return non-null {@link List}
*/
List<T> getData();
/**
* The size of {@link #getData() data}
*
* @return positive integer
*/
default int getDataSize() {
return getData().size();
}
/**
* It indicates has next page or not
*
* @return if has , return <code>true</code>, or <code>false</code>
*/
boolean hasNext();
/**
* Returns whether the page has data at all.
*
* @return
*/
default boolean hasData() {
return getDataSize() > 0;
}
}
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