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fixing indentation and few changes suggested by Abe for OpenJPA patch-168 

git-svn-id: https://svn.apache.org/repos/asf/incubator/openjpa/trunk@523071 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
David J. Wisneski 2007-03-27 20:47:21 +00:00
parent f7aef45814
commit fee930886b
11 changed files with 155 additions and 141 deletions
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16
openjpa-jdbc/src/main/java/org/apache/openjpa/jdbc/kernel/JDBCStoreManager.java
View File

@ -363,18 +363,18 @@ public class JDBCStoreManager
* null if there is no data in the current fetch groups to select.
*/
private Result getInitializeStateResult(OpenJPAStateManager sm,
ClassMapping mapping, JDBCFetchConfiguration fetch, int subs)
throws SQLException {
ClassMapping mapping, JDBCFetchConfiguration fetch, int subs)
throws SQLException {
Select sel = _sql.newSelect();
if (!select(sel, mapping, subs, sm, null, fetch,
JDBCFetchConfiguration.EAGER_JOIN, true, false))
JDBCFetchConfiguration.EAGER_JOIN, true, false))
return null;
sel.wherePrimaryKey(sm.getObjectId(), mapping, this);
//Set the expectedResultCount for the select as 1 as a single
//object is being loaded. force = true is an indicator that it is
//internally generated value
sel.setExpectedResultCount(1,true);
return sel.execute(this, fetch);
// Set the expectedResultCount for the select as 1 as a single
// object is being loaded. force = true is an indicator that it is
// internally generated value
sel.setExpectedResultCount(1,true);
return sel.execute(this, fetch);
}
/**

28
openjpa-jdbc/src/main/java/org/apache/openjpa/jdbc/kernel/JDBCStoreQuery.java
View File

@ -48,6 +48,7 @@ import org.apache.openjpa.jdbc.sql.Select;
import org.apache.openjpa.jdbc.sql.Union;
import org.apache.openjpa.kernel.ExpressionStoreQuery;
import org.apache.openjpa.kernel.OrderingMergedResultObjectProvider;
import org.apache.openjpa.kernel.QueryHints;
import org.apache.openjpa.kernel.exps.ExpressionFactory;
import org.apache.openjpa.kernel.exps.ExpressionParser;
import org.apache.openjpa.kernel.exps.FilterListener;
@ -319,23 +320,22 @@ public class JDBCStoreQuery
subclassMode);
if (verts.length == 1 && subclasses)
subclassBits.set(sels.size());
// create criteria select and clone for each vert mapping
sel = ((JDBCExpressionFactory) facts[i]).getSelectConstructor().
evaluate(ctx, null, null, exps[i], states[i]);
//it means it is coming from getSingleResult so set the
//expectedResultCount to 1.force = true indicates that this is
//internally generated value
if(this.ctx.isUnique())
sel.setExpectedResultCount(1,true);
//it means this is coming from getResultList so set the
//expectedResultCount based on any optimize hint if provided
else{
if((optHint = ctx.fetch.getHint
(this.optimizeHint))!= null)
sel.setExpectedResultCount
(((Integer)optHint).intValue(),false);
}
// It means it is coming from getSingleResult so set the
// expectedResultCount to 1.force = true indicates that this is
// internally generated value
if (this.ctx.isUnique())
sel.setExpectedResultCount(1,true);
// It means this is coming from getResultList so set the
// expectedResultCount based on any optimize hint if provided
else {
if ((optHint = ctx.fetch.getHint
(QueryHints.HINT_RESULT_COUNT))!= null)
sel.setExpectedResultCount
(((Integer)optHint).intValue(),false);
}
for (int j = 0; j < verts.length; j++) {
selMappings.add(verts[j]);
if (j == verts.length - 1) {

93
openjpa-jdbc/src/main/java/org/apache/openjpa/jdbc/sql/DB2Dictionary.java
View File

@ -28,8 +28,7 @@ import org.apache.openjpa.jdbc.schema.Sequence;
*/
public class DB2Dictionary
extends AbstractDB2Dictionary {
//variables to support optimize clause
// variables to support optimize clause
public String optimizeClause = "optimize for";
public String rowClause = "row";
public DB2Dictionary() {
@ -195,67 +194,63 @@ public class DB2Dictionary
bigintTypeName = "DECIMAL(31,0)";
}
}
}
}
}
//based on the expectedResultCount of the select create the optimize
//for clause
/** Based on the expectedResultCount of the select create the optimize
* for clause
*/
public String getOptimizeClause(JDBCFetchConfiguration fetch,
int expectedResultCount) {
int expectedResultCount) {
Integer rows = null;
StringBuffer optimizeString = new StringBuffer();
if(expectedResultCount != 0)
optimizeString.append(" ").append(optimizeClause).append(" ")
.append(expectedResultCount).append(" ")
.append(rowClause).append(" ");
return optimizeString.toString();
if (expectedResultCount != 0)
optimizeString.append(" ").append(optimizeClause).append(" ")
.append(expectedResultCount).append(" ")
.append(rowClause).append(" ");
return optimizeString.toString();
}
//override the DBDictionary toSelect to call getOptimizeClause and append
//to the select string
/** Override the DBDictionary toSelect to call getOptimizeClause and append
* to the select string
*/
public SQLBuffer toSelect(SQLBuffer selects, JDBCFetchConfiguration fetch,
SQLBuffer from, SQLBuffer where, SQLBuffer group,
SQLBuffer having, SQLBuffer order,
boolean distinct, boolean forUpdate, long start, long end,
int expectedResultCount) {
String optimizeString = null;
SQLBuffer selString = toOperation(getSelectOperation(fetch),
selects, from, where,
group, having, order, distinct,
forUpdate, start, end);
//return toOperation(getSelectOperation(fetch), selects, from, where,
//group, having, order, distinct, forUpdate, start, end);
if(fetch != null)
optimizeString = getOptimizeClause(fetch, expectedResultCount);
if(optimizeString != null && optimizeString.length() > 0)
selString.append(optimizeString);
return selString;
}
//override the DBDictionary toSelect to pass expectedResultcount to the
//other toSelect method
String optimizeString = null;
SQLBuffer selString = toOperation(getSelectOperation(fetch),
selects, from, where,
group, having, order, distinct,
forUpdate, start, end);
if (fetch != null)
optimizeString = getOptimizeClause(fetch, expectedResultCount);
if (optimizeString != null && optimizeString.length() > 0)
selString.append(optimizeString);
return selString;
}
/** Override the DBDictionary toSelect to pass expectedResultcount to the
* other toSelect method
*/
public SQLBuffer toSelect(Select sel, boolean forUpdate,
JDBCFetchConfiguration fetch) {
sel.addJoinClassConditions();
boolean update = forUpdate && sel.getFromSelect() == null;
SQLBuffer select = getSelects(sel, false, update);
SQLBuffer ordering = null;
if (!sel.isAggregate() || sel.getGrouping() != null)
ordering = sel.getOrdering();
SQLBuffer from;
if (sel.getFromSelect() != null)
from = getFromSelect(sel, forUpdate);
else
from = getFrom(sel, update);
SQLBuffer where = getWhere(sel, update);
return toSelect(select, fetch, from, where, sel.getGrouping(),
sel.addJoinClassConditions();
boolean update = forUpdate && sel.getFromSelect() == null;
SQLBuffer select = getSelects(sel, false, update);
SQLBuffer ordering = null;
if (!sel.isAggregate() || sel.getGrouping() != null)
ordering = sel.getOrdering();
SQLBuffer from;
if (sel.getFromSelect() != null)
from = getFromSelect(sel, forUpdate);
else
from = getFrom(sel, update);
SQLBuffer where = getWhere(sel, update);
return toSelect(select, fetch, from, where, sel.getGrouping(),
sel.getHaving(), ordering, sel.isDistinct(), forUpdate,
sel.getStartIndex(),
sel.getEndIndex(),sel.getExpectedResultCount());
}
}
}

40
openjpa-jdbc/src/main/java/org/apache/openjpa/jdbc/sql/LogicalUnion.java
View File

@ -47,11 +47,7 @@ public class LogicalUnion
private static final Localizer _loc = Localizer.forPackage
(LogicalUnion.class);
//expected number of results for this select to be used in
// optimize for clause
protected int expectedResultCount = 0;
//indicate if this is internally generated result count
//or not
protected boolean force = false;
protected final UnionSelect[] sels;
protected final DBDictionary dict;
@ -215,9 +211,10 @@ public class LogicalUnion
if (this.getExpectedResultCount()== 1) {
AbstractResult res;
for (int i = 0; i < sels.length; i++) {
//for each select set the expected result count to 1
//and force true indicating that this internally generated value
sels[i].sel.setExpectedResultCount(1,true);
// For each select set the expected result count to 1
// and force true indicating that this internally generated
// value
sels[i].sel.setExpectedResultCount(1,true);
res = (AbstractResult) sels[i].execute(store, fetch,
lockLevel);
res.setBaseMapping(mappings[i]);
@ -305,10 +302,7 @@ public class LogicalUnion
protected final int pos;
protected int orders = 0;
protected List orderIdxs = null;
// expected number of results for this select to be used in
// optimize for clause
protected int expectedResultCount = 0;
//force indicates it is internally generated result count or not
protected boolean force = false;
public UnionSelect(SelectImpl sel, int pos) {
@ -844,17 +838,19 @@ public class LogicalUnion
return sel.toString();
}
public int getExpectedResultCount() {
return expectedResultCount;
}
public int getExpectedResultCount() {
return expectedResultCount;
}
public void setExpectedResultCount(int expectedResultCount, boolean force) {
this.expectedResultCount = expectedResultCount;
public void setExpectedResultCount(int expectedResultCount,
boolean force) {
this.expectedResultCount = expectedResultCount;
this.force = force;
}
public boolean isExpRsltCntForced() {
return force;
}
}
public boolean isExpRsltCntForced() {
return force;
}
}
/**
@ -939,11 +935,13 @@ public class LogicalUnion
public int getExpectedResultCount() {
return expectedResultCount;
}
public void setExpectedResultCount(int expectedResultCount,boolean force) {
public void setExpectedResultCount(int expectedResultCount,
boolean force) {
this.expectedResultCount = expectedResultCount;
this.force = force;
}
public boolean isExpRsltCntForced() {
return force;
}

6
openjpa-jdbc/src/main/java/org/apache/openjpa/jdbc/sql/SelectExecutor.java
View File

@ -130,12 +130,10 @@ public interface SelectExecutor {
* force indicates whether the count is internally generated
* or given by the user as optimize hint
*/
public void setExpectedResultCount(int expectedResultCount,boolean force) ;
/**
* Indicates whether the expectedResultCount is internally generated
*/
public boolean isExpRsltCntForced();
public boolean isExpRsltCntForced();
}

39
openjpa-jdbc/src/main/java/org/apache/openjpa/jdbc/sql/SelectImpl.java
View File

@ -154,11 +154,7 @@ public class SelectImpl
private SelectImpl _from = null;
private SelectImpl _outer = null;
//expected number of results for this select to be used in
// optimize for clause
private int expectedResultCount = 0;
//true if the expectedResultCount is internally set false if
//it is set by the user
private boolean force = false;
/**
@ -312,19 +308,19 @@ public class SelectImpl
throws SQLException {
boolean forUpdate = false;
//expectedResultCount = 1 and force means that it is internally generated value
//for getSingleResult,single valued relationship.We need to check if
//there are any eager joins in the select if there are then the
//optimize for 1 row clause is not generated else we do. if
//!force then it is set by the user through hint and we
//do not check the eager joins
if(this.expectedResultCount == 1 && force ){
if(this.hasEagerJoin(true))
// ExpectedResultCount = 1 and force means that it is internally
// generated value for getSingleResult,single valued relationship.
// We need to check if there are any eager joins in the select if
// there are then the optimize for 1 row clause is not generated
// else we do. if !force then it is set by the user through hint
// and we do not check the eager joins
if (this.expectedResultCount == 1 && force ) {
if (this.hasEagerJoin(true))
this.setExpectedResultCount(0,false);
else
this.setExpectedResultCount(1,false);
}
this.setExpectedResultCount(1,false);
}
if (!isAggregate() && _grouping == null) {
JDBCLockManager lm = store.getLockManager();
if (lm != null)
@ -2821,14 +2817,15 @@ public class SelectImpl
}
}
public int getExpectedResultCount() {
return expectedResultCount;
}
public int getExpectedResultCount() {
return expectedResultCount;
}
public void setExpectedResultCount(int expectedResultCount, boolean force) {
this.expectedResultCount = expectedResultCount;
public void setExpectedResultCount(int expectedResultCount,
boolean force) {
this.expectedResultCount = expectedResultCount;
this.force = force;
}
}
public boolean isExpRsltCntForced() {
return force;

3
openjpa-kernel/src/main/java/org/apache/openjpa/kernel/AbstractStoreQuery.java
View File

@ -33,8 +33,7 @@ public abstract class AbstractStoreQuery
implements StoreQuery {
protected QueryContext ctx = null;
public static final String optimizeHint ="openjpa.hint.OptimizeResultCount";
public QueryContext getContext() {
return ctx;
}

25
openjpa-kernel/src/main/java/org/apache/openjpa/kernel/QueryHints.java Normal file
View File

@ -0,0 +1,25 @@
/*
* Copyright 2006 The Apache Software Foundation.
*
* Licensed 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.kernel;
public interface QueryHints {
/** Hint to specify the number of rows for the optimize
* clause for DB2
*/
public static final String HINT_RESULT_COUNT =
"openjpa.hint.OptimizeResultCount";
}

2
openjpa-kernel/src/main/java/org/apache/openjpa/kernel/QueryImpl.java
View File

@ -1290,7 +1290,7 @@ public class QueryImpl
return Arrays.asList(new Object[]{ single });
}
if(single == null)
if (single == null)
throw new InvalidStateException(_loc.get("is-null",
_class, _query));

3
openjpa-persistence/src/main/java/org/apache/openjpa/persistence/OpenJPAQuery.java
View File

@ -24,6 +24,7 @@ import javax.persistence.Query;
import javax.persistence.TemporalType;
import org.apache.openjpa.kernel.QueryFlushModes;
import org.apache.openjpa.kernel.QueryHints;
import org.apache.openjpa.kernel.QueryOperations;
import org.apache.openjpa.kernel.exps.AggregateListener;
import org.apache.openjpa.kernel.exps.FilterListener;
@ -36,7 +37,7 @@ import org.apache.openjpa.kernel.exps.FilterListener;
* @published
*/
public interface OpenJPAQuery
extends Query, QueryOperations, QueryFlushModes {
extends Query, QueryOperations, QueryFlushModes, QueryHints {
/**
* The owning entity manage.

41
openjpa-persistence/src/main/java/org/apache/openjpa/persistence/QueryImpl.java
View File

@ -279,13 +279,12 @@ public class QueryImpl
*/
public Object getSingleResult() {
_em.assertNotCloseInvoked();
//Indicate that this query returns single result.Later copied into
//select.expectedResultCount
// Indicate that this query returns single result.Later copied into
// select.expectedResultCount
_query.setUnique(true);
try{
Object ob = execute();
return ob;
try {
Object ob = execute();
return ob;
} finally {
_query.setUnique(false);
}
@ -366,27 +365,29 @@ public class QueryImpl
} else if (k.startsWith("FetchPlan.")) {
k = k.substring("FetchPlan.".length());
Filters.hintToSetter(getFetchPlan(), k, value);
} else if (k.startsWith("hint.")){
if("hint.OptimizeResultCount".equals(k)){
if((!(value instanceof String)&&!(value instanceof Integer))
|| (value instanceof String &&(Integer.parseInt
((String)value)< 0))||((value instanceof Integer)
&& (((Integer)value).intValue()<0)) )
throw new ArgumentException(_loc.get
("bad-hint-value", key),
null, null, false);
if(value instanceof String)
} else if (k.startsWith("hint.")) {
if ("hint.OptimizeResultCount".equals(k)) {
if ((!(value instanceof String)&&! (value instanceof Integer))
|| (value instanceof String &&(Integer.parseInt
((String)value)< 0))||
((value instanceof Integer)
&& (((Integer)value).intValue()<0)))
throw new ArgumentException(_loc.get
("bad-hint-value", key),
null, null, false);
if (value instanceof String)
value = new Integer((String)value);
}
}
_query.getFetchConfiguration().setHint(key, value);
}
else
throw new ArgumentException(_loc.get("bad-query-hint", key),
null, null, false);
return this;
}catch(NumberFormatException e1){
throw new ArgumentException(_loc.get("bad-hint-value", key),
null, null, false);
}
catch (NumberFormatException e1) {
throw new ArgumentException(_loc.get("bad-hint-value", key),
null, null, false);
}
catch (Exception e) {
throw PersistenceExceptions.toPersistenceException(e);