static void genclass(DelegatorGenerator dg, Class intfcl, String fqcn, File srcroot)
throws IOException {
File genDir = new File(srcroot, dirForFqcn(fqcn));
if (!genDir.exists()) {
System.err.println(
JdbcProxyGenerator.class.getName()
+ " -- creating directory: "
+ genDir.getAbsolutePath());
genDir.mkdirs();
}
String fileName = CodegenUtils.fqcnLastElement(fqcn) + ".java";
Writer w = null;
try {
w = new BufferedWriter(new FileWriter(new File(genDir, fileName)));
dg.writeDelegator(intfcl, fqcn, w);
w.flush();
System.err.println("Generated " + fileName);
} finally {
try {
if (w != null) w.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
protected void generateExtraDeclarations(Class intfcl, String genclass, IndentedWriter iw)
throws IOException {
super.generateExtraDeclarations(intfcl, genclass, iw);
iw.println();
iw.println("NewProxyConnection proxyCon;");
iw.println();
iw.print(CodegenUtils.fqcnLastElement(genclass));
iw.println(
"( "
+ CodegenUtils.simpleClassName(intfcl)
+ " inner, NewPooledConnection parentPooledConnection, NewProxyConnection proxyCon )");
iw.println("{");
iw.upIndent();
iw.println("this( inner, parentPooledConnection );");
iw.println("this.proxyCon = proxyCon;");
iw.downIndent();
iw.println("}");
}
void generateFindMethodAndArgs(Method method, IndentedWriter iw) throws IOException {
iw.println("Class[] argTypes = ");
iw.println("{");
iw.upIndent();
Class[] argTypes = method.getParameterTypes();
for (int i = 0, len = argTypes.length; i < len; ++i) {
if (i != 0) iw.println(",");
iw.print(CodegenUtils.simpleClassName(argTypes[i]) + ".class");
}
iw.println();
iw.downIndent();
iw.println("};");
iw.println(
"Method method = Connection.class.getMethod( \042"
+ method.getName()
+ "\042 , argTypes );");
iw.println();
iw.println("Object[] args = ");
iw.println("{");
iw.upIndent();
for (int i = 0, len = argTypes.length; i < len; ++i) {
if (i != 0) iw.println(",");
String argName = CodegenUtils.generatedArgumentName(i);
Class argType = argTypes[i];
if (argType.isPrimitive()) {
if (argType == boolean.class) iw.print("Boolean.valueOf( " + argName + " )");
else if (argType == byte.class) iw.print("new Byte( " + argName + " )");
else if (argType == char.class) iw.print("new Character( " + argName + " )");
else if (argType == short.class) iw.print("new Short( " + argName + " )");
else if (argType == int.class) iw.print("new Integer( " + argName + " )");
else if (argType == long.class) iw.print("new Long( " + argName + " )");
else if (argType == float.class) iw.print("new Float( " + argName + " )");
else if (argType == double.class) iw.print("new Double( " + argName + " )");
} else iw.print(argName);
}
iw.downIndent();
iw.println("};");
}
protected void generateExtraDeclarations(Class intfcl, String genclass, IndentedWriter iw)
throws IOException {
super.generateExtraDeclarations(intfcl, genclass, iw);
iw.println();
iw.println("Object creator;");
iw.println("Object creatorProxy;");
iw.println("NewProxyConnection proxyConn;");
iw.println();
iw.print(CodegenUtils.fqcnLastElement(genclass));
iw.println(
"( "
+ CodegenUtils.simpleClassName(intfcl)
+ " inner, NewPooledConnection parentPooledConnection, Object c, Object cProxy )");
iw.println("{");
iw.upIndent();
iw.println("this( inner, parentPooledConnection );");
iw.println("this.creator = c;");
iw.println("this.creatorProxy = cProxy;");
iw.println(
"if (creatorProxy instanceof NewProxyConnection) this.proxyConn = (NewProxyConnection) cProxy;");
iw.downIndent();
iw.println("}");
}
protected void generateDelegateCode(
Class intfcl, String genclass, Method method, IndentedWriter iw) throws IOException {
String mname = method.getName();
if (jdbc4WrapperMethod(mname)) {
generateWrapperDelegateCode(intfcl, genclass, method, iw);
return;
}
Class retType = method.getReturnType();
if (ResultSet.class.isAssignableFrom(retType)) {
iw.println("ResultSet innerResultSet = inner." + CodegenUtils.methodCall(method) + ";");
iw.println("if (innerResultSet == null) return null;");
iw.println(
"return new NewProxyResultSet( innerResultSet, parentPooledConnection, inner, this );");
} else if (mname.equals("getConnection")) {
iw.println("return this.proxyCon;");
} else super.generateDelegateCode(intfcl, genclass, method, iw);
}
protected void generateExtraDeclarations(Class intfcl, String genclass, IndentedWriter iw)
throws IOException {
// premature-detach-debug-debug only!
if (PREMATURE_DETACH_DEBUG) {
iw.println("com.mchange.v2.debug.ThreadNameStackTraceRecorder prematureDetachRecorder");
iw.upIndent();
iw.println(
"= new com.mchange.v2.debug.ThreadNameStackTraceRecorder(\042Premature Detach Recorder\042);");
iw.downIndent();
}
// end-premature-detach-debug-only!
iw.println("private final static MLogger logger = MLog.getLogger( \042" + genclass + "\042 );");
iw.println();
iw.println("volatile NewPooledConnection parentPooledConnection;");
iw.println();
iw.println("ConnectionEventListener cel = new ConnectionEventListener()");
iw.println("{");
iw.upIndent();
iw.println("public void connectionErrorOccurred(ConnectionEvent evt)");
iw.println(
"{ /* DON'T detach()... IGNORE -- this could be an ordinary error. Leave it to the PooledConnection to test, but leave proxies intact */ }");
// BAD puppy -- iw.println("{ detach(); }");
iw.println();
iw.println("public void connectionClosed(ConnectionEvent evt)");
iw.println("{ detach(); }");
iw.downIndent();
iw.println("};");
iw.println();
iw.println("void attach( NewPooledConnection parentPooledConnection )");
iw.println("{");
iw.upIndent();
// iw.println("System.err.println( \"attach( \" + parentPooledConnection + \" )\" );");
iw.println("this.parentPooledConnection = parentPooledConnection;");
iw.println("parentPooledConnection.addConnectionEventListener( cel );");
iw.downIndent();
iw.println("}");
iw.println();
iw.println("private void detach()");
iw.println("{");
iw.upIndent();
// factored out so we could define debug versions...
writeDetachBody(iw);
iw.downIndent();
iw.println("}");
iw.println();
iw.print(CodegenUtils.fqcnLastElement(genclass));
iw.println(
"( "
+ CodegenUtils.simpleClassName(intfcl)
+ " inner, NewPooledConnection parentPooledConnection )");
iw.println("{");
iw.upIndent();
iw.println("this( inner );");
iw.println("attach( parentPooledConnection );");
generateExtraConstructorCode(intfcl, genclass, iw);
iw.downIndent();
iw.println("}");
iw.println();
iw.println("boolean isDetached()");
iw.println("{ return (this.parentPooledConnection == null); }");
iw.println();
iw.println(
"public String toString() { return super.toString() + \042 [wrapping: \042 + inner + \042]\042; }");
/*
// Support JDBC4 Wrapper interface
String wrappedLiteral = intfcl.getName() + ".class";
iw.println();
iw.println("public boolean isWrapperFor(Class<?> iface) throws SQLException");
iw.println("{");
iw.upIndent();
iw.println("return ( " + wrappedLiteral + "== iface || " + wrappedLiteral + ".isAssignableFrom( iface ) );" );
iw.downIndent();
iw.println("}");
iw.println();
iw.println("public <T> T unwrap(Class<T> iface) throws SQLException");
iw.println("{");
iw.upIndent();
iw.println("if (this.isWrapperFor( iface )) return inner;");
iw.println("else throw new SQLException( this + \042 is not a wrapper for \042 + iface.getName());");
iw.downIndent();
iw.println("}");
*/
iw.println();
generateIsWrapperHelperMethods(intfcl, iw);
}
protected void generateDelegateCode(
Class intfcl, String genclass, Method method, IndentedWriter iw) throws IOException {
String mname = method.getName();
if (jdbc4WrapperMethod(mname)) {
generateWrapperDelegateCode(intfcl, genclass, method, iw);
return;
}
if (mname.equals("createStatement")) {
iw.println("txn_known_resolved = false;");
iw.println();
iw.println("Statement innerStmt = inner." + CodegenUtils.methodCall(method) + ";");
iw.println("parentPooledConnection.markActiveUncachedStatement( innerStmt );");
iw.println(
"return new NewProxyStatement( innerStmt, parentPooledConnection, false, this );");
} else if (mname.equals("prepareStatement")) {
iw.println("txn_known_resolved = false;");
iw.println();
iw.println("PreparedStatement innerStmt;");
iw.println();
iw.println("if ( parentPooledConnection.isStatementCaching() )");
iw.println("{");
iw.upIndent();
iw.println("try");
iw.println("{");
iw.upIndent();
generateFindMethodAndArgs(method, iw);
iw.println(
"innerStmt = (PreparedStatement) parentPooledConnection.checkoutStatement( method, args );");
iw.println(
"return new NewProxyPreparedStatement( innerStmt, parentPooledConnection, true, this );");
iw.downIndent();
iw.println("}");
iw.println("catch (ResourceClosedException e)");
iw.println("{");
iw.upIndent();
iw.println("if ( logger.isLoggable( MLevel.FINE ) )");
iw.upIndent();
iw.println(
"logger.log( MLevel.FINE, "
+ "\042A Connection tried to prepare a Statement via a Statement cache that is already closed. "
+ "This can happen -- rarely -- if a DataSource is closed or reset() while Connections are checked-out and in use.\042, e );");
iw.downIndent();
// repeated code... any changes probably need to be duplicated below
iw.println("innerStmt = inner." + CodegenUtils.methodCall(method) + ";");
iw.println("parentPooledConnection.markActiveUncachedStatement( innerStmt );");
iw.println(
"return new NewProxyPreparedStatement( innerStmt, parentPooledConnection, false, this );");
iw.downIndent();
iw.println("}");
iw.downIndent();
iw.println("}");
iw.println("else");
iw.println("{");
iw.upIndent();
// repeated code... any changes probably need to be duplicated above
iw.println("innerStmt = inner." + CodegenUtils.methodCall(method) + ";");
iw.println("parentPooledConnection.markActiveUncachedStatement( innerStmt );");
iw.println(
"return new NewProxyPreparedStatement( innerStmt, parentPooledConnection, false, this );");
iw.downIndent();
iw.println("}");
} else if (mname.equals("prepareCall")) {
iw.println("txn_known_resolved = false;");
iw.println();
iw.println("CallableStatement innerStmt;");
iw.println();
iw.println("if ( parentPooledConnection.isStatementCaching() )");
iw.println("{");
iw.upIndent();
iw.println("try");
iw.println("{");
iw.upIndent();
generateFindMethodAndArgs(method, iw);
iw.println(
"innerStmt = (CallableStatement) parentPooledConnection.checkoutStatement( method, args );");
iw.println(
"return new NewProxyCallableStatement( innerStmt, parentPooledConnection, true, this );");
iw.downIndent();
iw.println("}");
iw.println("catch (ResourceClosedException e)");
iw.println("{");
iw.upIndent();
iw.println("if ( logger.isLoggable( MLevel.FINE ) )");
iw.upIndent();
iw.println(
"logger.log( MLevel.FINE, "
+ "\042A Connection tried to prepare a CallableStatement via a Statement cache that is already closed. "
+ "This can happen -- rarely -- if a DataSource is closed or reset() while Connections are checked-out and in use.\042, e );");
iw.downIndent();
// repeated code... any changes probably need to be duplicated below
iw.println("innerStmt = inner." + CodegenUtils.methodCall(method) + ";");
iw.println("parentPooledConnection.markActiveUncachedStatement( innerStmt );");
iw.println(
"return new NewProxyCallableStatement( innerStmt, parentPooledConnection, false, this );");
iw.downIndent();
iw.println("}");
iw.downIndent();
iw.println("}");
iw.println("else");
iw.println("{");
iw.upIndent();
// repeated code... any changes probably need to be duplicated above
iw.println("innerStmt = inner." + CodegenUtils.methodCall(method) + ";");
iw.println("parentPooledConnection.markActiveUncachedStatement( innerStmt );");
iw.println(
"return new NewProxyCallableStatement( innerStmt, parentPooledConnection, false, this );");
iw.downIndent();
iw.println("}");
} else if (mname.equals("getMetaData")) {
iw.println("txn_known_resolved = false;");
iw.println();
iw.println("if (this.metaData == null)");
iw.println("{");
iw.upIndent();
iw.println(
"DatabaseMetaData innerMetaData = inner." + CodegenUtils.methodCall(method) + ";");
iw.println(
"this.metaData = new NewProxyDatabaseMetaData( innerMetaData, parentPooledConnection, this );");
iw.downIndent();
iw.println("}");
iw.println("return this.metaData;");
} else if (mname.equals("setTransactionIsolation")) {
// do nothing with txn_known_resolved
super.generateDelegateCode(intfcl, genclass, method, iw);
iw.println(
"parentPooledConnection.markNewTxnIsolation( "
+ CodegenUtils.generatedArgumentName(0)
+ " );");
} else if (mname.equals("setCatalog")) {
// do nothing with txn_known_resolved
super.generateDelegateCode(intfcl, genclass, method, iw);
iw.println(
"parentPooledConnection.markNewCatalog( "
+ CodegenUtils.generatedArgumentName(0)
+ " );");
} else if (mname.equals("setHoldability")) {
// do nothing with txn_known_resolved
super.generateDelegateCode(intfcl, genclass, method, iw);
iw.println(
"parentPooledConnection.markNewHoldability( "
+ CodegenUtils.generatedArgumentName(0)
+ " );");
} else if (mname.equals("setReadOnly")) {
// do nothing with txn_known_resolved
super.generateDelegateCode(intfcl, genclass, method, iw);
iw.println(
"parentPooledConnection.markNewReadOnly( "
+ CodegenUtils.generatedArgumentName(0)
+ " );");
} else if (mname.equals("setTypeMap")) {
// do nothing with txn_known_resolved
super.generateDelegateCode(intfcl, genclass, method, iw);
iw.println(
"parentPooledConnection.markNewTypeMap( "
+ CodegenUtils.generatedArgumentName(0)
+ " );");
} else if (mname.equals("getWarnings") || mname.equals("clearWarnings")) {
// do nothing with txn_known_resolved
super.generateDelegateCode(intfcl, genclass, method, iw);
} else if (mname.equals("close")) {
iw.println("if (! this.isDetached())");
iw.println("{");
iw.upIndent();
iw.println("NewPooledConnection npc = parentPooledConnection;");
iw.println("this.detach();");
iw.println("npc.markClosedProxyConnection( this, txn_known_resolved );");
iw.println("this.inner = null;");
iw.downIndent();
iw.println("}");
iw.println("else if (Debug.DEBUG && logger.isLoggable( MLevel.FINE ))");
iw.println("{");
iw.upIndent();
iw.println("logger.log( MLevel.FINE, this + \042: close() called more than once.\042 );");
// premature-detach-debug-debug only!
if (PREMATURE_DETACH_DEBUG) {
iw.println("prematureDetachRecorder.record();");
iw.println(
"logger.warning( prematureDetachRecorder.getDump(\042Apparent multiple close of "
+ getInnerTypeName()
+ ".\042) );");
}
// end-premature-detach-debug-only!
iw.downIndent();
iw.println("}");
} else if (mname.equals("isClosed")) {
iw.println("return this.isDetached();");
} else if (mname.equals("isValid")) {
iw.println("if (this.isDetached()) return false;");
super.generateDelegateCode(intfcl, genclass, method, iw);
} else {
boolean known_resolved =
(mname.equals("commit") || mname.equals("rollback") || mname.equals("setAutoCommit"));
if (!known_resolved) {
iw.println("txn_known_resolved = false;");
iw.println();
}
super.generateDelegateCode(intfcl, genclass, method, iw);
if (known_resolved) {
iw.println();
iw.println("txn_known_resolved = true;");
}
}
}
protected void generateExtraDeclarations(Class intfcl, String genclass, IndentedWriter iw)
throws IOException {
super.generateExtraDeclarations(intfcl, genclass, iw);
iw.println();
// concurrent-access-debug only!
if (CONCURRENT_ACCESS_DEBUG) {
iw.println("com.mchange.v2.debug.ThreadNameStackTraceRecorder concurrentAccessRecorder");
iw.upIndent();
iw.println(
"= new com.mchange.v2.debug.ThreadNameStackTraceRecorder(\042Concurrent Access Recorder\042);");
iw.downIndent();
}
// end concurrent-access-debug only!
iw.println("boolean is_cached;");
iw.println("NewProxyConnection creatorProxy;");
iw.println();
iw.println("// Although formally unnecessary, we sync access to myProxyResultSets on");
iw.println("// that set's own lock, in case clients (illegally but not uncommonly) close()");
iw.println("// the Statement from a Thread other than the one they use in general");
iw.println("// with the Statement");
iw.println("HashSet myProxyResultSets = new HashSet();");
iw.println();
iw.println("public void detachProxyResultSet( ResultSet prs )");
iw.println("{");
iw.upIndent();
// iw.println("System.err.println(\042detachProxyResultSet\042);");
iw.println("synchronized (myProxyResultSets) { myProxyResultSets.remove( prs ); }");
iw.downIndent();
iw.println("}");
iw.println();
iw.print(CodegenUtils.fqcnLastElement(genclass));
iw.println(
"( "
+ CodegenUtils.simpleClassName(intfcl)
+ " inner, NewPooledConnection parentPooledConnection, boolean cached, NewProxyConnection cProxy )");
iw.println("{");
iw.upIndent();
iw.println("this( inner, parentPooledConnection );");
iw.println("this.is_cached = cached;");
iw.println("this.creatorProxy = cProxy;");
iw.downIndent();
iw.println("}");
iw.println();
iw.println(
"public Object rawStatementOperation(Method m, Object target, Object[] args) "
+ "throws IllegalAccessException, InvocationTargetException, SQLException");
iw.println("{");
iw.upIndent();
iw.println("maybeDirtyTransaction();");
iw.println();
iw.println("if (target == C3P0ProxyStatement.RAW_STATEMENT) target = inner;");
iw.println("for (int i = 0, len = args.length; i < len; ++i)");
iw.upIndent();
iw.println("if (args[i] == C3P0ProxyStatement.RAW_STATEMENT) args[i] = inner;");
iw.downIndent();
iw.println("Object out = m.invoke(target, args);");
iw.println("if (out instanceof ResultSet)");
iw.println("{");
iw.upIndent();
iw.println("ResultSet innerResultSet = (ResultSet) out;");
iw.println(
"parentPooledConnection.markActiveResultSetForStatement( inner, innerResultSet );");
iw.println(
"out = new NewProxyResultSet( innerResultSet, parentPooledConnection, inner, this );");
iw.downIndent();
iw.println("}");
iw.println();
iw.println("return out;");
iw.downIndent();
iw.println("}");
iw.println();
iw.println("void maybeDirtyTransaction()");
iw.println("{ if (creatorProxy != null) creatorProxy.maybeDirtyTransaction(); }");
}
protected void generateDelegateCode(
Class intfcl, String genclass, Method method, IndentedWriter iw) throws IOException {
String mname = method.getName();
if (jdbc4WrapperMethod(mname)) {
generateWrapperDelegateCode(intfcl, genclass, method, iw);
return;
}
Class retType = method.getReturnType();
iw.println("maybeDirtyTransaction();");
iw.println();
if (ResultSet.class.isAssignableFrom(retType)) {
iw.println("ResultSet innerResultSet = inner." + CodegenUtils.methodCall(method) + ";");
iw.println("if (innerResultSet == null) return null;");
iw.println(
"parentPooledConnection.markActiveResultSetForStatement( inner, innerResultSet );");
iw.println(
"NewProxyResultSet out = new NewProxyResultSet( innerResultSet, parentPooledConnection, inner, this );");
iw.println("synchronized ( myProxyResultSets ) { myProxyResultSets.add( out ); }");
iw.println("return out;");
} else if (mname.equals("getConnection")) {
iw.println("if (! this.isDetached())");
iw.upIndent();
iw.println("return creatorProxy;");
iw.downIndent();
iw.println("else");
iw.upIndent();
iw.println("throw new SQLException(\"You cannot operate on a closed Statement!\");");
iw.downIndent();
} else if (mname.equals("close")) {
iw.println("if (! this.isDetached())");
iw.println("{");
iw.upIndent();
// iw.println("System.err.println(\042Closing proxy Statement: \042 + this);");
iw.println("synchronized ( myProxyResultSets )");
iw.println("{");
iw.upIndent();
iw.println("for( Iterator ii = myProxyResultSets.iterator(); ii.hasNext(); )");
iw.println("{");
iw.upIndent();
iw.println("ResultSet closeMe = (ResultSet) ii.next();");
iw.println("ii.remove();");
iw.println();
iw.println("try { closeMe.close(); }");
iw.println("catch (SQLException e)");
iw.println("{");
iw.upIndent();
iw.println("if (logger.isLoggable( MLevel.WARNING ))");
iw.upIndent();
iw.println(
"logger.log( MLevel.WARNING, \042Exception on close of apparently orphaned ResultSet.\042, e);");
iw.downIndent();
iw.downIndent();
iw.println("}");
iw.println("if (logger.isLoggable( MLevel.FINE ))");
iw.upIndent();
iw.println(
"logger.log( MLevel.FINE, this + \042 closed orphaned ResultSet: \042 +closeMe);");
iw.downIndent();
iw.downIndent();
iw.println("}");
iw.downIndent();
iw.println("}");
iw.println();
iw.println("if ( is_cached )");
iw.upIndent();
iw.println("parentPooledConnection.checkinStatement( inner );");
iw.downIndent();
iw.println("else");
iw.println("{");
iw.upIndent();
iw.println("parentPooledConnection.markInactiveUncachedStatement( inner );");
iw.println("try{ inner.close(); }");
iw.println("catch (Exception e )");
iw.println("{");
iw.upIndent();
iw.println("if (logger.isLoggable( MLevel.WARNING ))");
iw.upIndent();
iw.println(
"logger.log( MLevel.WARNING, \042Exception on close of inner statement.\042, e);");
iw.downIndent();
iw.println("SQLException sqle = SqlUtils.toSQLException( e );");
iw.println("throw sqle;");
iw.downIndent();
iw.println("}");
iw.downIndent();
iw.println("}");
iw.println();
iw.println("this.detach();");
iw.println("this.inner = null;");
iw.println("this.creatorProxy = null;");
iw.downIndent();
iw.println("}");
} else if (mname.equals("isClosed")) {
iw.println("return this.isDetached();");
} else super.generateDelegateCode(intfcl, genclass, method, iw);
}