private static Statement convertAstToAssignStatement(ASTStatement ast, Path prefix)
throws SyntaxException {
// Sanity check. Ensure that this is a assignment statement.
assert (ast.getStatementType() == StatementType.ASSIGN);
AssignmentStatement statement = null;
// Get the identifier and create the path. Resolve this against the
// prefix if the given path is relative.
Path path = createPathFromIdentifier(ast);
path = Path.resolve(prefix, path);
// Create the assignment statement.
assert (ast.jjtGetNumChildren() <= 1);
if (ast.jjtGetNumChildren() == 0) {
// This is a delete statement.
Element element = Null.VALUE;
statement =
AssignmentStatement.createAssignmentStatement(
ast.getSourceRange(), path, element, ast.getConditionalFlag(), !ast.getFinalFlag());
} else {
// This is a normal assignment statement.
ASTOperation child = (ASTOperation) ast.jjtGetChild(0);
Operation dml = astToDml(child, true);
statement =
AssignmentStatement.createAssignmentStatement(
ast.getSourceRange(), path, dml, ast.getConditionalFlag(), !ast.getFinalFlag());
}
return statement;
}
private static Statement convertAstToBindStatement(String source, ASTStatement ast)
throws SyntaxException {
// Sanity check. Ensure that this is a bind statement.
assert (ast.getStatementType() == StatementType.BIND);
// Get identifier and create path.
Path path = createPathFromIdentifier(ast);
// Verify that there is exactly one child.
assert (ast.jjtGetNumChildren() == 1);
// Now check to see if the node is a FullTypeSpec or DML.
SimpleNode child = (SimpleNode) ast.jjtGetChild(0);
FullType fullType = null;
if (child instanceof ASTFullTypeSpec) {
fullType = astToFullType(source, (ASTFullTypeSpec) child);
} else if (child instanceof ASTOperation) {
Operation dml = astToDml((ASTOperation) child, true);
AliasType elementType = new AliasType(null, child.getSourceRange(), "element", null);
fullType = new FullType(source, child.getSourceRange(), elementType, null, dml);
} else {
assert (false);
}
return new BindStatement(ast.getSourceRange(), path, fullType);
}
public static Template convertAstToTemplate(File file, ASTTemplate ast) throws SyntaxException {
// Create a list containing all of the statements.
LinkedList<Statement> statements = new LinkedList<Statement>();
// By default the prefix for paths is empty.
Path prefix = null;
// Loop over all of the children, convert them to Statements, and add
// them to the list.
int nchild = ast.jjtGetNumChildren();
for (int i = 0; i < nchild; i++) {
Node n = ast.jjtGetChild(i);
assert (n instanceof ASTStatement);
ASTStatement snode = (ASTStatement) n;
StatementType stype = snode.getStatementType();
switch (stype) {
case NOOP:
// Empty statement. Do nothing.
break;
case BIND:
statements.add(convertAstToBindStatement(file.getAbsolutePath(), snode));
break;
case ASSIGN:
statements.add(convertAstToAssignStatement(snode, prefix));
break;
case VARIABLE:
statements.add(convertAstToVariableStatement(snode));
break;
case TYPE:
statements.add(convertAstToTypeStatement(file.getAbsolutePath(), snode));
break;
case FUNCTION:
statements.add(convertAstToFunctionStatement(snode));
break;
case INCLUDE:
Statement stmt = convertAstToIncludeStatement(snode);
if (stmt != null) {
statements.add(stmt);
}
break;
case PREFIX:
prefix = convertAstToPrefixStatement(snode);
break;
default:
assert (false);
break;
}
}
Template t =
new Template(
file, ast.getSourceRange(), ast.getTemplateType(), ast.getIdentifier(), statements);
return t;
}
private static Statement convertAstToIncludeStatement(ASTStatement ast) throws SyntaxException {
// Sanity check.
assert (ast.getStatementType() == StatementType.INCLUDE);
// Include statement must always have an associated DML block. If it
// evaluates to a compile time constant, then the operation will be
// optimized into a static include statement.
assert (ast.jjtGetNumChildren() == 1);
ASTOperation child = (ASTOperation) ast.jjtGetChild(0);
Operation dml = astToDml(child, true);
return IncludeStatement.newIncludeStatement(ast.getSourceRange(), dml);
}
private static Statement convertAstToFunctionStatement(ASTStatement ast) throws SyntaxException {
// Sanity check.
assert (ast.getStatementType() == StatementType.FUNCTION);
// Get identifier and verify it isn't null.
String fname = ast.getIdentifier();
assert (fname != null);
assert (ast.jjtGetNumChildren() == 1);
// Create the assignment statement.
ASTOperation child = (ASTOperation) ast.jjtGetChild(0);
Operation dml = astToDml(child, true);
return new FunctionStatement(ast.getSourceRange(), fname, dml);
}
private static Statement convertAstToTypeStatement(String source, ASTStatement ast)
throws SyntaxException {
// Sanity check.
assert (ast.getStatementType() == StatementType.TYPE);
// Verify that the identifier is not null.
String tname = ast.getIdentifier();
assert (tname != null);
assert (ast.jjtGetNumChildren() == 1);
// Create the assignment statement.
ASTFullTypeSpec child = (ASTFullTypeSpec) ast.jjtGetChild(0);
FullType fullType = astToFullType(source, child);
return new TypeStatement(ast.getSourceRange(), tname, fullType);
}
private static Statement convertAstToVariableStatement(ASTStatement ast) throws SyntaxException {
// Sanity check.
assert (ast.getStatementType() == StatementType.VARIABLE);
// Verify that the identifier is not null.
String vname = ast.getIdentifier();
assert (vname != null);
assert (ast.jjtGetNumChildren() == 1);
// Create the assignment statement.
ASTOperation child = (ASTOperation) ast.jjtGetChild(0);
Operation dml = astToDml(child, true);
return VariableStatement.getInstance(
ast.getSourceRange(), vname, dml, ast.getConditionalFlag(), !ast.getFinalFlag());
}
private static Path convertAstToPrefixStatement(ASTStatement ast) throws SyntaxException {
// Sanity check.
assert (ast.getStatementType() == StatementType.PREFIX);
if (!"".equals(ast.getIdentifier())) {
// Normal path was given check that it is absolute.
Path path = createPathFromIdentifier(ast);
if (!path.isAbsolute()) {
throw SyntaxException.create(
ast.getSourceRange(), MessageUtils.MSG_PREFIX_MUST_BE_ABSOLUTE_PATH, path.toString());
}
return path;
} else {
// Empty path was given so just return null to indicate there is no
// prefix.
return null;
}
}