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OPENJPA-235 break-nullable-patch contributed by Markus Fuchs 

git-svn-id: https://svn.apache.org/repos/asf/openjpa/trunk@557089 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Craig Russell 2007-07-17 23:56:45 +00:00
parent 62ae83f3b5
commit b8bb8404a9
12 changed files with 680 additions and 86 deletions
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207
openjpa-jdbc/src/main/java/org/apache/openjpa/jdbc/kernel/ConstraintUpdateManager.java
View File

@ -24,6 +24,7 @@ import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import org.apache.openjpa.jdbc.meta.ClassMapping;
@ -43,6 +44,7 @@ import org.apache.openjpa.lib.graph.Graph;
import org.apache.openjpa.lib.util.Localizer;
import org.apache.openjpa.util.InternalException;
import org.apache.openjpa.util.OpenJPAException;
import org.apache.openjpa.util.UserException;
/**
* <p>Standard update manager, capable of foreign key constraint evaluation.</p>
@ -163,7 +165,7 @@ public class ConstraintUpdateManager
row2 = getInsertRow(insertMap, rowMgr, row);
if (row2 != null) {
ignoreUpdates = false;
graphs[1] = addEdge(graphs[1], row, (PrimaryRow) row2, null);
graphs[1] = addEdge(graphs[1], (PrimaryRow) row2, row, null);
}
// now check this row's fks against other deletes
@ -180,7 +182,7 @@ public class ConstraintUpdateManager
row2 = rowMgr.getRow(fks[j].getPrimaryKeyTable(),
Row.ACTION_DELETE, fkVal, false);
if (row2 != null && row2.isValid() && row2 != row)
graphs[1] = addEdge(graphs[1], row, (PrimaryRow) row2,
graphs[1] = addEdge(graphs[1], (PrimaryRow) row2, row,
fks[j]);
}
}
@ -249,7 +251,7 @@ public class ConstraintUpdateManager
Row.ACTION_INSERT, row.getForeignKeySet(fks[j]), false);
if (row2 != null && row2.isValid() && (row2 != row
|| fks[j].isDeferred() || fks[j].isLogical()))
graph = addEdge(graph, (PrimaryRow) row2, row, fks[j]);
graph = addEdge(graph, row, (PrimaryRow) row2, fks[j]);
}
// see if there are any relation id columns dependent on
@ -263,7 +265,7 @@ public class ConstraintUpdateManager
row2 = rowMgr.getRow(getBaseTable(sm), Row.ACTION_INSERT,
sm, false);
if (row2 != null && row2.isValid())
graph = addEdge(graph, (PrimaryRow) row2, row, cols[j]);
graph = addEdge(graph, row, (PrimaryRow) row2, cols[j]);
}
}
return graph;
@ -318,34 +320,55 @@ public class ConstraintUpdateManager
return;
DepthFirstAnalysis dfa = newDepthFirstAnalysis(graph, autoAssign);
Collection nodes = dfa.getSortedNodes();
Collection backs = dfa.getEdges(Edge.TYPE_BACK);
Collection insertUpdates = new LinkedList();
Collection deleteUpdates = new LinkedList();
boolean recalculate;
// handle circular constraints:
// - if deleted row A has a ciricular fk to deleted row B, then use an
// update statement to null A's fk to B
// Handle circular constraints:
// - if deleted row A has a ciricular fk to deleted row B,
// then use an update statement to null A's fk to B before flushing,
// and then flush
// - if inserted row A has a circular fk to updated/inserted row B,
// then null the fk in the B row object, and after flushing, use
// an update to set the fk to back to A
Collection insertUpdates = null;
Collection deleteUpdates = null;
// then null the fk in the B row object, then flush,
// and after flushing, use an update to set the fk back to A
// Depending on where circular dependencies are broken, the
// topological order of the graph nodes has to be re-calculated.
recalculate = resolveCycles(graph, dfa.getEdges(Edge.TYPE_BACK),
deleteUpdates, insertUpdates);
recalculate |= resolveCycles(graph, dfa.getEdges(Edge.TYPE_FORWARD),
deleteUpdates, insertUpdates);
if (recalculate) {
dfa = recalculateDepthFirstAnalysis(graph, autoAssign);
}
// flush delete updates to null fks, then all rows in order, then
// the insert updates to set circular fk values
flush(deleteUpdates, psMgr);
Collection nodes = dfa.getSortedNodes();
for (Iterator itr = nodes.iterator(); itr.hasNext();)
psMgr.flush((RowImpl) itr.next());
flush(insertUpdates, psMgr);
}
/**
* Break a circular dependency caused by delete operations.
* If deleted row A has a ciricular fk to deleted row B, then use an update
* statement to null A's fk to B before deleting B, then delete A.
* @param edge Edge in the dependency graph corresponding to a foreign key
* constraint. This dependency is broken by nullifying the foreign key.
* @param deleteUpdates Collection of update statements that are executed
* before the delete operations are flushed
*/
private void addDeleteUpdate(Edge edge, Collection deleteUpdates)
throws SQLException {
PrimaryRow row;
RowImpl update;
Edge edge;
ForeignKey fk;
Column col;
for (Iterator itr = backs.iterator(); itr.hasNext();) {
edge = (Edge) itr.next();
if (edge.getUserObject() == null)
throw new InternalException(_loc.get("del-ins-cycle"));
// use a primary row update to prevent setting pk and fk values
// until after flush, to get latest auto-increment values
row = (PrimaryRow) edge.getTo();
if (row.getAction() == Row.ACTION_DELETE) {
// copy where conditions into new update that nulls the fk
row = (PrimaryRow) edge.getFrom();
update = new PrimaryRow(row.getTable(), Row.ACTION_UPDATE,null);
row = (PrimaryRow) edge.getTo();
update = new PrimaryRow(row.getTable(), Row.ACTION_UPDATE, null);
row.copyInto(update, true);
if (edge.getUserObject() instanceof ForeignKey) {
fk = (ForeignKey) edge.getUserObject();
@ -353,18 +376,36 @@ public class ConstraintUpdateManager
} else
update.setNull((Column) edge.getUserObject());
if (deleteUpdates == null)
deleteUpdates = new LinkedList();
deleteUpdates.add(update);
} else {
}
/**
* Break a circular dependency caused by insert operations.
* If inserted row A has a circular fk to updated/inserted row B,
* then null the fk in the B row object, then flush,
* and after flushing, use an update to set the fk back to A.
* @param row Row to be flushed
* @param edge Edge in the dependency graph corresponding to a foreign key
* constraint. This dependency is broken by nullifying the foreign key.
* @param insertUpdates Collection of update statements that are executed
* after the insert/update operations are flushed
*/
private void addInsertUpdate(PrimaryRow row, Edge edge,
Collection insertUpdates) throws SQLException {
RowImpl update;
ForeignKey fk;
Column col;
// copy where conditions into new update that sets the fk
update = new PrimaryRow(row.getTable(), Row.ACTION_UPDATE,null);
update = new PrimaryRow(row.getTable(), Row.ACTION_UPDATE, null);
if (row.getAction() == Row.ACTION_INSERT) {
if (row.getPrimaryKey() == null)
throw new InternalException(_loc.get("ref-cycle"));
update.wherePrimaryKey(row.getPrimaryKey());
} else
} else {
// Row.ACTION_UPDATE
row.copyInto(update, true);
}
if (edge.getUserObject() instanceof ForeignKey) {
fk = (ForeignKey) edge.getUserObject();
update.setForeignKey(fk, row.getForeignKeyIO(fk),
@ -377,20 +418,106 @@ public class ConstraintUpdateManager
row.clearRelationId(col);
}
if (insertUpdates == null)
insertUpdates = new LinkedList();
insertUpdates.add(update);
}
/**
* Finds a nullable foreign key by walking the dependency cycle.
* Circular dependencies can be broken at this point.
* @param cycle Cycle in the dependency graph.
* @return Edge corresponding to a nullable foreign key.
*/
private Edge findBreakableLink(List cycle) {
Edge breakableLink = null;
for (Iterator iter = cycle.iterator(); iter.hasNext(); ) {
Edge edge = (Edge) iter.next();
Object userObject = edge.getUserObject();
if (userObject instanceof ForeignKey) {
if (!((ForeignKey) userObject).hasNotNullColumns()) {
breakableLink = edge;
break;
}
} else if (userObject instanceof Column) {
if (!((Column) userObject).isNotNull()) {
breakableLink = edge;
break;
}
}
}
return breakableLink;
}
// flush delete updates to null fks, then all rows in order, then
// the insert updates to set circular fk values
if (deleteUpdates != null)
flush(deleteUpdates, psMgr);
for (Iterator itr = nodes.iterator(); itr.hasNext();)
psMgr.flush((RowImpl) itr.next());
if (insertUpdates != null)
flush(insertUpdates, psMgr);
/**
* Re-calculates the DepthFirstSearch analysis of the graph
* after some of the edges have been removed. Ensures
* that the dependency graph is cycle free.
* @param graph The graph of statements to be walked
* @param autoAssign Whether any of the rows in the graph have any
* auto-assign constraints
*/
private DepthFirstAnalysis recalculateDepthFirstAnalysis(Graph graph,
boolean autoAssign) {
DepthFirstAnalysis dfa;
// clear previous traversal data
graph.clearTraversal();
dfa = newDepthFirstAnalysis(graph, autoAssign);
// make sure that the graph is non-cyclic now
assert (dfa.hasNoCycles()): _loc.get("graph-not-cycle-free");
return dfa;
}
/**
* Resolve circular dependencies by identifying and breaking
* a nullable foreign key.
* @param graph Dependency graph.
* @param edges Collection of edges. Each edge indicates a possible
* circular dependency
* @param deleteUpdates Collection of update operations (nullifying
* foreign keys) to be filled. These updates will be executed before
* the rows in the dependency graph are flushed
* @param insertUpdates CCollection of update operations (nullifying
* foreign keys) to be filled. These updates will be executed after
* the rows in the dependency graph are flushed
* @return Depending on where circular dependencies are broken, the
* topological order of the graph nodes has to be re-calculated.
*/
private boolean resolveCycles(Graph graph, Collection edges,
Collection deleteUpdates, Collection insertUpdates)
throws SQLException {
boolean recalculate = false;
for (Iterator itr = edges.iterator(); itr.hasNext();) {
Edge edge = (Edge) itr.next();
List cycle = edge.getCycle();
if (cycle != null) {
// find a nullable foreign key
Edge breakableLink = findBreakableLink(cycle);
if (breakableLink == null) {
throw new UserException(_loc.get("no-nullable-fk"));
}
// topologic node order must be re-calculated, if the
// breakable link is different from the edge where
// the circular dependency was originally detected
if (edge != breakableLink) {
recalculate = true;
}
if (!breakableLink.isRemovedFromGraph()) {
// use a primary row update to prevent setting pk and fk values
// until after flush, to get latest auto-increment values
PrimaryRow row = (PrimaryRow) breakableLink.getFrom();
if (row.getAction() == Row.ACTION_DELETE) {
addDeleteUpdate(breakableLink, deleteUpdates);
} else {
addInsertUpdate(row, breakableLink, insertUpdates);
}
graph.removeEdge(breakableLink);
}
}
}
return recalculate;
}
/**

13
openjpa-jdbc/src/main/java/org/apache/openjpa/jdbc/schema/ForeignKey.java
View File

@ -701,6 +701,19 @@ public class ForeignKey
&& match(getPrimaryKeyColumns(), fkPKCols);
}
/**
* Checks for non-nullable local columns.
*/
public boolean hasNotNullColumns() {
Column[] columns = getColumns();
for (int j = 0; j < columns.length; j++) {
if (columns[j].isNotNull()) {
return true;
}
}
return false;
}
private static boolean match(Column[] cols, Column[] fkCols) {
if (cols.length != fkCols.length)
return false;

8
openjpa-jdbc/src/main/resources/org/apache/openjpa/jdbc/kernel/localizer.properties
View File

@ -102,3 +102,11 @@ bad-level: Invalid isolation level. Valid levels are -1, \
Connection.TRANSACTION_READ_COMMITTED, \
Connection.TRANSACTION_REPEATABLE_READ, or \
Connection.TRANSACTION_SERIALIZABLE. Specified value: {0}.
no-nullable-fk: No nullable foreign key found to resolve circular flush\n\
dependency. During flush processing, changes to instances, new\n\
instances, and deleted instances must be processed in a specific sequence\n\
to avoid foreign key constraint violations. The changes required in this\n\
transaction cannot be reordered because none of the foreign key constraints\n\
is nullable (optional).
graph-not-cycle-free: A circular flush dependency has been found after all \
circular dependencies should have been resolved.

155
openjpa-lib/src/main/java/org/apache/openjpa/lib/graph/DepthFirstAnalysis.java
View File

@ -18,6 +18,8 @@
*/
package org.apache.openjpa.lib.graph;
import org.apache.openjpa.lib.util.Localizer;
import java.util.AbstractList;
import java.util.ArrayList;
import java.util.Arrays;
@ -26,6 +28,7 @@ import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
@ -42,6 +45,9 @@ import java.util.Map;
*/
public class DepthFirstAnalysis {
private static final Localizer _loc = Localizer.forPackage
(DepthFirstAnalysis.class);
private final Graph _graph;
private final Map _nodeInfo = new HashMap();
private Comparator _comp;
@ -65,14 +71,15 @@ public class DepthFirstAnalysis {
node = itr.next();
info = (NodeInfo) _nodeInfo.get(node);
if (info.color == NodeInfo.COLOR_WHITE)
visit(graph, node, info, 0);
visit(graph, node, info, 0, new LinkedList());
}
}
/**
* Visit a node. See Introduction to Algorithms book for details.
*/
private int visit(Graph graph, Object node, NodeInfo info, int time) {
private int visit(Graph graph, Object node, NodeInfo info, int time,
List path) {
// discover node
info.color = NodeInfo.COLOR_GRAY;
@ -89,14 +96,24 @@ public class DepthFirstAnalysis {
otherInfo = (NodeInfo) _nodeInfo.get(other);
if (otherInfo.color == NodeInfo.COLOR_WHITE) {
// undiscovered node; recurse into it
childTime = visit(graph, other, otherInfo, time);
path.add(edge);
childTime = visit(graph, other, otherInfo, time, path);
path.remove(edge);
edge.setType(Edge.TYPE_TREE);
} else if (otherInfo.color == NodeInfo.COLOR_GRAY) {
childTime = -1;
edge.setType(Edge.TYPE_BACK);
// calculate the cycle including this edge
edge.setCycle(cycleForBackEdge(edge, path));
} else {
childTime = otherInfo.finished;
edge.setType(Edge.TYPE_FORWARD);
// find the cycle including this edge
List cycle = new LinkedList();
cycle.add(edge);
if (cycleForForwardEdge(graph, other, node, cycle)) {
edge.setCycle(cycle);
}
}
maxChildTime = Math.max(maxChildTime, childTime);
}
@ -134,7 +151,7 @@ public class DepthFirstAnalysis {
/**
* Return all edges of the given type. This method can be used to
* discover all edges that cause cycles in the graph by passing it
* the {@link #EDGE_BACK} edge type.
* the {@link Edge#TYPE_BACK} or {@link Edge#TYPE_FORWARD} edge type.
*/
public Collection getEdges(int type) {
Collection typed = null;
@ -166,6 +183,132 @@ public class DepthFirstAnalysis {
return info.finished;
}
/**
* Returns a list of graph edges forming a cycle. The cycle begins
* with a type {@link Edge#TYPE_BACK} edge.
* @param backEdge "Starting" edge of the cycle
* @param path Continuous list of graph edges, may be null
* @param pos Index of the first edge in path continuing the cycle
* @return Cycle starting with a type {@link Edge#TYPE_BACK} edge
*/
private List buildCycle(Edge backEdge, List path, int pos) {
int length = path != null ? path.size() - pos : 0;
List cycle = new ArrayList(length + 1);
cycle.add(0, backEdge);
for (int i = 0; i < length; i++) {
cycle.add(i + 1, path.get(pos + i));
}
return cycle;
}
/**
* Computes the list of edges forming a cycle. The cycle always exists for
* a type {@link Edge#TYPE_BACK} edge. This method should only be called
* for type {@link Edge#TYPE_BACK} edges.
* @param edge Edge where the cycle was detected
* @param path Path consisting of edges to the edge's starting node
* @return Cycle starting with a type {@link Edge#TYPE_BACK} edge
*/
private List cycleForBackEdge(Edge edge, List path) {
if (edge.getType() != Edge.TYPE_BACK) {
return null;
}
List cycle;
int pos = 0;
if (path != null && edge.getFrom() != edge.getTo()) {
// Not a single edge loop
pos = findNodeInPath(edge.getTo(), path);
assert (pos >= 0): _loc.get("node-not-on-path", edge, edge.getTo());
} else {
assert (edge.getFrom() == edge.getTo()):
_loc.get("edge-no-loop", edge).getMessage();
path = null;
}
cycle = buildCycle(edge, path, pos);
assert (cycle != null): _loc.get("cycle-null", edge).getMessage();
return cycle;
}
/**
* Computes the cycle of edges including node cycleTo. The cycle must not
* necessarily exist. This method should only be called for type
* {@link Edge#TYPE_FORWARD} edges.
* @param graph Graph
* @param node Current node
* @param cycleTo End node for loop
* @param path Path from loop end node to current node
* @return True if a cycle has been found. The cycle will be contained in
* the <code>path</code> parameter.
*/
private boolean cycleForForwardEdge(Graph graph, Object node,
Object cycleTo, List path) {
boolean found = false;
Collection edges = graph.getEdgesFrom(node);
for (Iterator itr = edges.iterator(); !found && itr.hasNext();) {
Edge edge = (Edge) itr.next();
Object other = edge.getOther(node);
// Single edge loops are ignored
if (node != other) {
if (other == cycleTo) {
// Cycle complete
path.add(edge);
found = true;
} else if (!path.contains(edge)){
// Walk this edge
path.add(edge);
found = cycleForForwardEdge(graph, other, cycleTo, path);
if (!found) {
// Remove edge again
path.remove(edge);
}
}
}
}
return found;
}
/**
* Finds the position of the edge starting from a particular node in the
* continuous list of edges.
* @param node Node on the cycle.
* @param path Continuous list of graph edges.
* @return Edge index if found, -1 otherwise.
*/
private int findNodeInPath(Object node, List path) {
int pos = -1;
if (path != null) {
for (int i = 0; i < path.size(); i++) {
if (((Edge)path.get(i)).getFrom() == node) {
pos = i;
}
}
}
return pos;
}
/**
* Test, if the analysis didn't find cycles.
*/
public boolean hasNoCycles() {
// a) there must not be any back edges
if (!getEdges(Edge.TYPE_BACK).isEmpty()) {
return false;
}
// b) there might be forward edges
// make sure these don't indicate cycles
Collection edges = getEdges(Edge.TYPE_FORWARD);
if (!edges.isEmpty()) {
for (Iterator itr = edges.iterator(); itr.hasNext();) {
Edge edge = (Edge) itr.next();
if (edge.getCycle() != null) {
return false;
}
}
}
return true;
}
/**
* Comparator for toplogically sorting entries in the node info map.
*/
@ -184,8 +327,8 @@ public class DepthFirstAnalysis {
NodeInfo n1 = (NodeInfo) e1.getValue();
NodeInfo n2 = (NodeInfo) e2.getValue();
// reverse finished order
int ret = n2.finished - n1.finished;
// sort by finished order
int ret = n1.finished - n2.finished;
if (ret == 0 && _subComp != null)
ret = _subComp.compare(e1.getKey(), e2.getKey());
return ret;

33
openjpa-lib/src/main/java/org/apache/openjpa/lib/graph/Edge.java
View File

@ -18,6 +18,8 @@
*/
package org.apache.openjpa.lib.graph;
import java.util.List;
/**
* <p>A graph edge. Includes the from and to nodes, an arbitrary user object,
* and a weight. Edges can be either directed or undirected.</p>
@ -52,6 +54,8 @@ public class Edge {
private int _type = 0;
private double _weight = 0;
private Object _userObj = null;
private List _cycle = null;
private boolean _removedFromGraph = false;
/**
* Constructor.
@ -175,11 +179,40 @@ public class Edge {
_type = type;
}
/**
* List of edges forming a cycle. Only set for TYPE_BACK and TYPE_FORWARD edges.
*/
public List getCycle() {
return _cycle;
}
/**
* List of edges forming a cycle. Only set for TYPE_BACK and TYPE_FORWARD edges.
*/
public void setCycle(List cycle) {
_cycle = cycle;
}
/**
* Returns if this edge is (still) part of the graph.
*/
public boolean isRemovedFromGraph() {
return _removedFromGraph;
}
/**
* Mark this edge as removed from the graph.
*/
public void setRemovedFromGraph() {
this._removedFromGraph = true;
}
/**
* Clear traversal info.
*/
public void clearTraversal() {
_type = 0;
_cycle = null;
}
public String toString() {

22
openjpa-lib/src/main/resources/org/apache/openjpa/lib/graph/localizer.properties Normal file
View File

@ -0,0 +1,22 @@
# 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.
cycle-null: The cycle must not be null for edge {0}!
edge-no-loop: Edge {0} must be a single node loop, if the depth first search \
path is null!
node-not-on-path: Could not find node {1} in the depth first search path \
leading to edge {0}!

76
openjpa-lib/src/test/java/org/apache/openjpa/lib/graph/TestDepthFirstAnalysis.java
View File

@ -20,6 +20,7 @@ package org.apache.openjpa.lib.graph;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import org.apache.openjpa.lib.test.AbstractTestCase;
@ -34,6 +35,10 @@ public class TestDepthFirstAnalysis
private DepthFirstAnalysis _dfa = null;
public void setUp() {
setUpGraph1();
}
public void setUpGraph1() {
Graph graph = new Graph();
Object node1 = new Object();
Object node2 = new Object();
@ -51,15 +56,37 @@ public class TestDepthFirstAnalysis
_dfa = new DepthFirstAnalysis(graph);
}
public void setUpGraph2() {
Graph graph = new Graph();
Integer node1 = new Integer(5);
Integer node2 = new Integer(4);
Integer node3 = new Integer(3);
Integer node4 = new Integer(2);
Integer node5 = new Integer(1);
graph.addNode(node1);
graph.addNode(node2);
graph.addNode(node3);
graph.addNode(node4);
graph.addNode(node5);
graph.addEdge(new Edge(node1, node2, true));
graph.addEdge(new Edge(node2, node3, true));
graph.addEdge(new Edge(node3, node3, true));
graph.addEdge(new Edge(node3, node4, true));
graph.addEdge(new Edge(node4, node1, true));
graph.addEdge(new Edge(node4, node2, true));
graph.addEdge(new Edge(node5, node2, true));
_dfa = new DepthFirstAnalysis(graph);
}
public void testNodeSorting() {
Collection nodes = _dfa.getSortedNodes();
assertEquals(4, nodes.size());
int time = Integer.MAX_VALUE;
int time = 0;
Object node;
for (Iterator itr = nodes.iterator(); itr.hasNext();) {
node = itr.next();
assertTrue(time >= _dfa.getFinishedTime(node));
assertTrue(time <= _dfa.getFinishedTime(node));
time = _dfa.getFinishedTime(node);
}
}
@ -74,6 +101,51 @@ public class TestDepthFirstAnalysis
|| edge1.getTo() == edge1.getFrom());
}
public void testBackEdges() {
setUpGraph2();
Collection edges = _dfa.getEdges(Edge.TYPE_BACK);
assertEquals(2, edges.size());
Iterator itr = edges.iterator();
Edge edge0 = (Edge) itr.next();
Edge edge1 = (Edge) itr.next();
if (edge0.getTo() == edge0.getFrom()) {
assertTrue(edge0.getCycle() != null && edge0.getCycle().size() == 1);
List cycle = edge1.getCycle();
assertTrue(cycle != null && cycle.size() == 4);
assertTrue(((Edge)cycle.get(0)).getFrom() == ((Edge)cycle.get(3)).getTo());
} else if (edge1.getTo() == edge1.getFrom()) {
assertTrue(edge1.getCycle() != null && edge1.getCycle().size() == 1);
assertTrue(edge1 == edge1.getCycle());
List cycle = edge0.getCycle();
assertTrue(cycle != null && cycle.size() == 4);
assertTrue(((Edge)cycle.get(0)).getFrom() == ((Edge)cycle.get(3)).getTo());
} else {
// should not happen
assertFalse(true);
}
}
public void testForwardEdges() {
setUpGraph2();
Collection edges = _dfa.getEdges(Edge.TYPE_FORWARD);
assertEquals(2, edges.size());
Iterator itr = edges.iterator();
Edge edge0 = (Edge) itr.next();
Edge edge1 = (Edge) itr.next();
if (edge0.getCycle() == null) {
List cycle = edge1.getCycle();
assertTrue(cycle != null && cycle.size() == 3);
assertTrue(((Edge)cycle.get(0)).getFrom() == ((Edge)cycle.get(2)).getTo());
} else if (edge1.getCycle() == null) {
List cycle = edge0.getCycle();
assertTrue(cycle != null && cycle.size() == 3);
assertTrue(((Edge)cycle.get(0)).getFrom() == ((Edge)cycle.get(2)).getTo());
} else {
// should not happen
assertFalse(true);
}
}
public static void main(String[] args) {
main(TestDepthFirstAnalysis.class);
}

2
openjpa-persistence-jdbc/src/test/java/org/apache/openjpa/jdbc/kernel/EntityB.java
View File

@ -40,7 +40,7 @@ public class EntityB {
private String name;
@OneToOne(cascade = CascadeType.ALL)
@OneToOne(cascade = CascadeType.ALL, optional = false)
@JoinColumn(name = "entityc_id", referencedColumnName = "entityc_id",
nullable = false)
@ForeignKey

2
openjpa-persistence-jdbc/src/test/java/org/apache/openjpa/jdbc/kernel/EntityC.java
View File

@ -41,7 +41,7 @@ public class EntityC {
private String name;
@OneToOne(cascade = CascadeType.ALL)
@OneToOne(cascade = CascadeType.ALL, optional = false)
@JoinColumn(name = "entityd_id", referencedColumnName = "entityd_id",
nullable = false)
@ForeignKey

30
openjpa-persistence-jdbc/src/test/java/org/apache/openjpa/jdbc/kernel/EntityD.java
View File

@ -18,12 +18,16 @@
*/
package org.apache.openjpa.jdbc.kernel;
import org.apache.openjpa.persistence.jdbc.ForeignKey;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Version;
import javax.persistence.OneToOne;
import javax.persistence.JoinColumn;
@Entity
public class EntityD {
@ -35,6 +39,16 @@ public class EntityD {
private String name;
@OneToOne
@JoinColumn(name = "entitya_id", referencedColumnName = "entitya_id")
@ForeignKey
private EntityA entityA;
@OneToOne
@JoinColumn(name = "entityb_id", referencedColumnName = "entityb_id")
@ForeignKey
private EntityB entityB;
@Version
private Integer optLock;
@ -49,6 +63,22 @@ public class EntityD {
return id;
}
public EntityA getEntityA() {
return this.entityA;
}
public void setEntityA(EntityA entityA) {
this.entityA = entityA;
}
public EntityB getEntityB() {
return entityB;
}
public void setEntityB(EntityB entityB) {
this.entityB = entityB;
}
public String getName() {
return this.name;
}

76
openjpa-persistence-jdbc/src/test/java/org/apache/openjpa/jdbc/kernel/EntityE.java Normal file
View File

@ -0,0 +1,76 @@
/*
* 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.openjpa.jdbc.kernel;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.OneToOne;
import javax.persistence.Version;
import org.apache.openjpa.persistence.jdbc.ForeignKey;
@Entity
public class EntityE {
@Id
@Column(name = "entitye_id", nullable = false)
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Integer id;
private String name;
@OneToOne
@JoinColumn(name = "entityb_id", referencedColumnName = "entityb_id")
@ForeignKey
private EntityB entityB;
@Version
private Integer optLock;
public EntityE() {
}
public void setId(Integer id) {
this.id = id;
}
public Integer getId() {
return id;
}
public EntityB getEntityB() {
return this.entityB;
}
public void setEntityB(EntityB entityB) {
this.entityB = entityB;
}
public String getName() {
return this.name;
}
public void setName(String name) {
this.name = name;
}
}

82
openjpa-persistence-jdbc/src/test/java/org/apache/openjpa/jdbc/kernel/TestNoForeignKeyViolation.java
View File

@ -34,15 +34,20 @@ public class TestNoForeignKeyViolation
private EntityA entityA;
private EntityB entityB;
private EntityC entityC;
private EntityD entityD;
public void setUp() {
setUp(EntityA.class, EntityB.class, EntityC.class, EntityD.class);
setUp(EntityA.class, EntityB.class, EntityC.class, EntityD.class, EntityE.class);
createTestData();
}
private void createTestData() {
entityA = new EntityA();
entityC = new EntityC();
EntityD entityD = new EntityD();
entityA.setName("entityA");
entityB = new EntityB();
entityC = new EntityC();
entityD = new EntityD();
entityA.setName("entityA");
entityB.setName("entityB");
entityC.setName("entityC");
entityD.setName("entityD");
@ -52,7 +57,6 @@ public class TestNoForeignKeyViolation
}
public void testSqlOrder() {
EntityManager em = emf.createEntityManager();
try {
em.getTransaction().begin();
@ -70,7 +74,7 @@ public class TestNoForeignKeyViolation
EntityC newEntityC = new EntityC();
newEntityC.setName("newEntityC");
newEntityD = new EntityD();
newEntityD.setName("newEntityD");
newEntityD.setName("newNewEntityD");
newEntityC.setEntityD(newEntityD);
entityB.setEntityC(newEntityC);
@ -84,4 +88,70 @@ public class TestNoForeignKeyViolation
em.close();
}
}
public void testSimpleCycle() {
EntityManager em = emf.createEntityManager();
try {
em.getTransaction().begin();
entityD.setEntityA(entityA);
em.persist(entityA);
em.getTransaction().commit();
}
finally {
if (em.getTransaction().isActive())
em.getTransaction().rollback();
em.close();
}
}
public void testComplexCycle() {
EntityManager em = emf.createEntityManager();
try {
EntityE entityE = new EntityE();
entityE.setName("entityE");
entityE.setEntityB(entityB);
em.getTransaction().begin();
em.persist(entityE);
entityD.setEntityA(entityA);
em.persist(entityA);
em.getTransaction().commit();
em.getTransaction().begin();
em.remove(entityE);
em.remove(entityA);
em.getTransaction().commit();
}
finally {
if (em.getTransaction().isActive())
em.getTransaction().rollback();
em.close();
}
}
public void testComplexTwoCycles() {
EntityManager em = emf.createEntityManager();
try {
EntityE entityE = new EntityE();
entityE.setName("entityE");
entityE.setEntityB(entityB);
em.getTransaction().begin();
em.persist(entityE);
entityD.setEntityA(entityA);
entityD.setEntityB(entityB);
em.persist(entityA);
em.getTransaction().commit();
em.getTransaction().begin();
em.remove(entityE);
em.remove(entityA);
em.getTransaction().commit();
}
finally {
if (em.getTransaction().isActive())
em.getTransaction().rollback();
em.close();
}
}
}