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* Patch from Juerg Lehni: try to autodetect Joins in additionalTables option.

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* Some code cleanup:
    - Don't do string concatenation in arguments to StringBuffer.append()
    - Remove redundant if clause
    - Remove throws statement for unthrown exceptions
    - Remove unneeded variable initialzation
This commit is contained in:
hns 2005-08-29 13:49:31 +00:00
parent 961f755c4f
commit 0f3d15cee5
3 changed files with 50 additions and 62 deletions
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11
src/helma/objectmodel/db/DbMapping.java
View file

@ -945,11 +945,8 @@ public final class DbMapping {
* @param rel the Relation we use to select. Currently only used for optimizer hints.
* Is null if selecting by primary key.
* @return the StringBuffer containing the first part of the select query
*
* @throws SQLException if the table meta data could not be retrieved
* @throws ClassNotFoundException if the JDBC driver class was not found
*/
public StringBuffer getSelect(Relation rel) throws SQLException, ClassNotFoundException {
public StringBuffer getSelect(Relation rel) {
// assign to local variable first so we are thread safe
// (selectString may be reset by other threads)
String sel = selectString;
@ -985,8 +982,8 @@ public final class DbMapping {
s.append(table);
if (rel != null && rel.additionalTables != null) {
s.append(',').append(rel.additionalTables);
if (rel != null) {
rel.appendAdditionalTables(s);
}
s.append(" ");
@ -1053,7 +1050,7 @@ public final class DbMapping {
rel.isReference())) ||
name.equalsIgnoreCase(getNameField()) ||
name.equalsIgnoreCase(getPrototypeField())) {
b1.append(", " + cols[i].getName());
b1.append(", ").append(cols[i].getName());
b2.append(", ?");
}
}

16
src/helma/objectmodel/db/NodeManager.java
View file

@ -453,7 +453,7 @@ public final class NodeManager {
if (dbm == null) {
throw new IllegalArgumentException("DbMapping can't be null in exportNode");
} else if ((dbm == null) || !dbm.isRelational()) {
} else if (!dbm.isRelational()) {
throw new IllegalArgumentException("Can't export into non-relational database");
} else {
insertRelationalNode(node, dbm, dbm.getConnection());
@ -901,7 +901,7 @@ public final class NodeManager {
Statement stmt = null;
try {
String q = null;
String q;
StringBuffer b = new StringBuffer("SELECT ");
@ -913,9 +913,7 @@ public final class NodeManager {
.append(idfield).append(" FROM ")
.append(table);
if (rel.additionalTables != null) {
b.append(',').append(rel.additionalTables);
}
rel.appendAdditionalTables(b);
if (home.getSubnodeRelation() != null) {
// subnode relation was explicitly set
@ -1282,9 +1280,7 @@ public final class NodeManager {
String q = null;
StringBuffer tables = new StringBuffer(table);
if (rel.additionalTables != null) {
tables.append(',').append(rel.additionalTables);
}
rel.appendAdditionalTables(tables);
// NOTE: we explicitly convert tables StringBuffer to a String
// before appending to be compatible with JDK 1.3
@ -1360,9 +1356,7 @@ public final class NodeManager {
StringBuffer tables = new StringBuffer(table);
if (rel.additionalTables != null) {
tables.append(',').append(rel.additionalTables);
}
rel.appendAdditionalTables(tables);
try {
// NOTE: we explicitly convert tables StringBuffer to a String

49
src/helma/objectmodel/db/Relation.java
View file

@ -92,7 +92,8 @@ public final class Relation {
String prototype;
String groupbyPrototype;
String filter;
String additionalTables;
private String additionalTables;
private boolean additionalTablesJoined = false;
String queryHints;
Vector filterFragments;
Vector filterPropertyRefs;
@ -115,6 +116,7 @@ public final class Relation {
this.filterFragments = rel.filterFragments;
this.filterPropertyRefs = rel.filterPropertyRefs;
this.additionalTables = rel.additionalTables;
this.additionalTablesJoined = rel.additionalTablesJoined;
this.queryHints = rel.queryHints;
this.maxSize = rel.maxSize;
this.constraints = rel.constraints;
@ -290,8 +292,16 @@ public final class Relation {
// get additional tables
additionalTables = props.getProperty(propName + ".filter.additionalTables");
if (additionalTables != null && additionalTables.trim().length() == 0) {
if (additionalTables != null) {
if (additionalTables.trim().length() == 0) {
additionalTables = null;
} else {
String ucTables = additionalTables.toUpperCase();
// see wether the JOIN syntax is used. look for " join " with whitespaces on both sides
// and for "join " at the beginning:
additionalTablesJoined = (ucTables.indexOf(" JOIN ") != -1 ||
ucTables.startsWith("STRAIGHT_JOIN ") || ucTables.startsWith("JOIN "));
}
}
// get query hints
@ -787,22 +797,29 @@ public final class Relation {
// add group and order clauses
if (groupby != null) {
q.append(" GROUP BY " + groupby);
q.append(" GROUP BY ").append(groupby);
if (useOrder && (groupbyOrder != null)) {
q.append(" ORDER BY " + groupbyOrder);
q.append(" ORDER BY ").append(groupbyOrder);
}
} else if (useOrder && (order != null)) {
q.append(" ORDER BY " + order);
q.append(" ORDER BY ").append(order);
}
return q.toString();
}
protected void appendAdditionalTables(StringBuffer q) {
if (additionalTables != null) {
q.append(additionalTablesJoined ? ' ' : ',');
q.append(additionalTables);
}
}
/**
* Build the filter.
*/
protected void appendFilter(StringBuffer q, INode nonvirtual, String prefix) throws SQLException {
protected void appendFilter(StringBuffer q, INode nonvirtual, String prefix) {
q.append(prefix);
q.append('(');
if (filterFragments == null) {
@ -813,26 +830,6 @@ public final class Relation {
while (i.hasMoreElements()) {
String fragment = (String) i.nextElement();
if (fragment == null) {
/*
// begin property version
String propertyName = (String) j.nextElement();
Object value = null;
if (propertyName != null) {
if (propertyName.equals("__id__") || propertyName.equals("_id")) {
value = nonvirtual.getID();
} else if (propertyName.equals("__name__")) {
value = nonvirtual.getName();
} else if (propertyName.equals("__prototype__") || propertyName.equals("_prototype")) {
value = nonvirtual.getPrototype();
} else {
IProperty property = nonvirtual.get(propertyName);
if (property != null) {
value = property.getValue();
}
}
}
// end property version
*/
// begin column version
String columnName = (String) j.nextElement();
Object value = null;