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* Licensed to the Apache Software Foundation (ASF) under one
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* 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
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package org.apache.cayenne.access;
import java.util.List;
import org.apache.art.ClobTestEntity;
import org.apache.cayenne.query.SelectQuery;
import org.apache.cayenne.unit.CayenneCase;
/**
*/
public class DataContextClobTest extends CayenneCase {
protected DataContext ctxt;
@Override
protected void setUp() throws Exception {
super.setUp();
deleteTestData();
ctxt = createDataContext();
}
protected boolean skipTests() {
return !getAccessStackAdapter().supportsLobs();
}
protected boolean skipEmptyLOBTests() {
return !getAccessStackAdapter().handlesNullVsEmptyLOBs();
}
public void testEmptyClob() throws Exception {
if (skipEmptyLOBTests()) {
return;
}
runWithClobSize(0);
}
public void test5ByteClob() throws Exception {
if (skipTests()) {
return;
}
runWithClobSize(5);
}
public void test5KByteClob() throws Exception {
if (skipTests()) {
return;
}
runWithClobSize(5 * 1024);
}
public void test1MBClob() throws Exception {
if (skipTests()) {
return;
}
runWithClobSize(1024 * 1024);
}
public void testNullClob() throws Exception {
if (skipTests()) {
return;
}
// insert new clob
ctxt.newObject(ClobTestEntity.class);
ctxt.commitChanges();
// read the CLOB in the new context
DataContext ctxt2 = createDataContext();
List<?> objects2 = ctxt2.performQuery(new SelectQuery(ClobTestEntity.class));
assertEquals(1, objects2.size());
ClobTestEntity clobObj2 = (ClobTestEntity) objects2.get(0);
assertNull("Expected null, got: '" + clobObj2.getClobCol() + "'", clobObj2
.getClobCol());
// update and save Clob
clobObj2.setClobCol("updated rather small clob...");
ctxt2.commitChanges();
// read into yet another context and check for changes
DataContext ctxt3 = createDataContext();
List<?> objects3 = ctxt3.performQuery(new SelectQuery(ClobTestEntity.class));
assertEquals(1, objects3.size());
ClobTestEntity clobObj3 = (ClobTestEntity) objects3.get(0);
assertEquals(clobObj2.getClobCol(), clobObj3.getClobCol());
}
protected void runWithClobSize(int sizeBytes) throws Exception {
// insert new clob
ClobTestEntity clobObj1 = ctxt.newObject(ClobTestEntity.class);
// init CLOB of a specified size
if (sizeBytes == 0) {
clobObj1.setClobCol("");
}
else {
byte[] bytes = new byte[sizeBytes];
for (int i = 0; i < sizeBytes; i++) {
bytes[i] = (byte) (65 + (50 + i) % 50);
}
clobObj1.setClobCol(new String(bytes));
}
ctxt.commitChanges();
// read the CLOB in the new context
DataContext ctxt2 = createDataContext();
List<?> objects2 = ctxt2.performQuery(new SelectQuery(ClobTestEntity.class));
assertEquals(1, objects2.size());
ClobTestEntity clobObj2 = (ClobTestEntity) objects2.get(0);
assertEquals(clobObj1.getClobCol(), clobObj2.getClobCol());
// update and save Clob
clobObj2.setClobCol("updated rather small clob...");
ctxt2.commitChanges();
// read into yet another context and check for changes
DataContext ctxt3 = createDataContext();
List<?> objects3 = ctxt3.performQuery(new SelectQuery(ClobTestEntity.class));
assertEquals(1, objects3.size());
ClobTestEntity clobObj3 = (ClobTestEntity) objects3.get(0);
assertEquals(clobObj2.getClobCol(), clobObj3.getClobCol());
}
}