Class
Interface
Statements
Expressions
Grammar
Statement ::= ( StatementBlock | IfStatement | SwitchStatement | WhileStatement | DoWhileStatement | ForStatement | ForEachStatement
| VariableStatement | ConstructorStatement | ExpressionStatement | BreakStatement | ContinueStatement | ReturnStatement ).
StatementBlock ::= "{" (Statement)* "}".
IfStatement ::= "if" "(" Expression ")" Statement ("else" Statement)?.
SwitchStatement ::= "switch" "(" Expression ")" "{" ("case" Expression ":" (Statement)*)* ("default" ":" (Statement)*)? "}"
WhileStatement ::= "while" "(" Expression ")" Statement.
DoWhileStatement ::= "do" Statement "while" "(" Expression ")" ";".
ForStatement ::= "for" "(" VariableDeclaration ";" Expression ";" Expression ")" Statement.
ForEachStatement ::= "for" "(" VariableDeclaration ":" Expression ")" Statement.
VariableStatement ::= VariableDeclaration VariableInit ";".
ConstructorStatement ::= ("super" | "this") "(" (ArgsList)? ")" ";".
ExpressionStatement ::= Expression ";".
BreakStatement ::= "break" ";".
ContinueStatement ::= "continue" ";".
ReturnStatement ::= "return" (Expression)? ";".
Example
int i = 2;
if (i>2) {
}
switch(i) {
case 2 :
return true;
case 4 :
return true;
default :
return false;
}
while (i>2) {
}
do {
} while (i>2);
for (int j = 0; j<10; j++) {
}
List list = [1,2,3];
for (Object element : list) {
}
Metadata
Grammar
Metadata ::= ID "=" MetadataValue.
MetadataValue ::= MetadataValueSingle | MetadataValueList | MetadataValueMap.
MetadataValueSingle ::= INTEGER | Double | CHAR | STRING | BOOLEAN | QName.
MetadataValueList ::= "[" (MetadataValue ("," MetadataValue)*)? "]".
MetadataValueMap ::= "[" (MetadataValueMapEntry ("," MetadataValueMapEntry)*)? "]".
MetadataValueMapEntry ::= MetadataValue ":" MetadataValue.
See operators in ODL or queries in QDL for examples.
Literals
Grammar
Integer ::= (0..9)+.
Double ::= (0..9)* "." (0..9)+.
Boolean ::= ("true" | "false").
Char ::= "'" Unicode-Character "'".
String ::= '"' (Unicode-Character)* '"'.
Range ::= (0..9)+ ".." (0..9)+.
List ::= "[" (Expression ("," Expression)*)? "]".
Map ::= "[" (MapKeyValue ("," MapKeyValue)*)? "]".
MapKeyValue ::= Expression ":" Expression.
Null ::= "null".
Example
Range r = 1..10; List l = [1, 2, 3]; Map m = ["key1":1, "key2":2];
Identifier, Qualified Name, Namespace
Grammar
ID ::= ("a".."z"|"A".."Z"|"_")("a".."z"|"A".."Z"|"_"|"0".."9")*.
QName ::= ID ("." ID)*
Namespace ::= "use" QualifiedNameWithWildcard ";".
QualifiedNameWildcard ::= QualifiedName (".*")?
Example
use java::util::*; use de::uniol::inf::is::odysseus::core::ISubscription; use com::google::common::collect::ImmutableMap;
Java-Code
Grammar
GPLCode ::= "$*" GPL Code "*$"
Example
$*
public static void main(String[] args) {
}
*$
Comments
Grammar
Comment ::= SingeLineComment | MultiLineComment.
SingeLineComment ::= "//" Text (("\r")? "\n")?.
MultiLineComment ::= "/*" Text "*/".
Example
// This is a single line comment /* * This is a multi line comment */