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author | lresende <lresende@13f79535-47bb-0310-9956-ffa450edef68> | 2009-11-02 22:22:29 +0000 |
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committer | lresende <lresende@13f79535-47bb-0310-9956-ffa450edef68> | 2009-11-02 22:22:29 +0000 |
commit | c6103c7c9a6b6971d2aa0b8e3997608cb5f2c36f (patch) | |
tree | b3bf9651ebfd1c6f6230f69342cd2fc6686a7b98 /das-java/trunk/rdb/src/main/java/org/apache/tuscany/das/rdb/impl/PagerImpl.java | |
parent | dbfb7d4e41886fd91f33e434c57d207061106c38 (diff) |
Move the das folder as new trunk for das sub project
git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@832144 13f79535-47bb-0310-9956-ffa450edef68
Diffstat (limited to 'das-java/trunk/rdb/src/main/java/org/apache/tuscany/das/rdb/impl/PagerImpl.java')
-rw-r--r-- | das-java/trunk/rdb/src/main/java/org/apache/tuscany/das/rdb/impl/PagerImpl.java | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/das-java/trunk/rdb/src/main/java/org/apache/tuscany/das/rdb/impl/PagerImpl.java b/das-java/trunk/rdb/src/main/java/org/apache/tuscany/das/rdb/impl/PagerImpl.java new file mode 100644 index 0000000000..27b653763b --- /dev/null +++ b/das-java/trunk/rdb/src/main/java/org/apache/tuscany/das/rdb/impl/PagerImpl.java @@ -0,0 +1,69 @@ +/* + * 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.tuscany.das.rdb.impl; + +import org.apache.tuscany.das.rdb.Command; +import org.apache.tuscany.das.rdb.Pager; + +import commonj.sdo.DataObject; + +public class PagerImpl implements Pager { + + private final ReadCommandImpl command; + + private final int size; + + private int idx = 1; + + public PagerImpl(Command command, int size) { + this.command = (ReadCommandImpl) command; + this.command.enablePaging(); + this.size = size; + } + + public DataObject next() { + int start = idx; + int end = idx + size; + idx += size; + command.setStartRow(start); + command.setEndRow(end); + return command.executeQuery(); + } + + public DataObject getPage(int page) { + int end = (page * size) + 1; + int start = end - size; + idx = end; + command.setStartRow(start); + command.setEndRow(end); + return command.executeQuery(); + } + + public DataObject previous() { + int start = idx - (2 * size); + if (start < 1) { + start = 1; + } + int end = start + size; + idx = end; + command.setStartRow(start); + command.setEndRow(end); + return command.executeQuery(); + } +} |