Methods and systems for evaluating bytecode in an on-demand service environment including translation of apex to bytecode

1. A method comprising:

receiving, with one or more processors, code conforming to a first programming language wherein the code conforming to the first programming language comprises on demand platform code capable of running without client-side servers or software where all values are reference types, the first programming language to be implemented as an abstract syntax tree (AST)-based language supporting an in-line version of a database query language, wherein the code conforming to the first programming language comprises at least a database query;

generating code conforming to a second programming language, wherein the code is a compiled AST bytecode of the code conforming to the first programming language, wherein the generating comprises:

generating a plurality of constructs for each property;

tracking each property with a tuple;

generating a closure method with the property;

for the database query in the first programming language, wherein the database query includes one or more expressions, performing the steps of:

unboxing the expression;

evaluating the one or more expressions to generate a results; and

storing results of the evolution in one or more temporary variables;

rewriting the form of the database query to refer to the one or more temporary variables; and

compiling the rewritten database query;

emitting the rewritten database query as a method invocation with a stringized form of the query;

storing a rewritten database query in a distributed caching system; and

executing the rewritten database query within an execution environment to provide functionality corresponding to the code conforming to the first programming language.

2. The method of claim 1 further comprising:

identifying intermediate values; and

eliminating boxing and unboxing for the intermediate values.

3. A method comprising:

receiving, with one or more processors, code conforming to a first programming language wherein the code conforming to the first programming language comprises on demand platform code capable of running without client-side servers or software where all values are reference types, the first programming language to be implemented as an abstract syntax tree (AST)-based language supporting an in-line version of a database query language, wherein the code conforming to the first programming language comprises at least a database query;

generating code conforming to a second programming language, wherein the code is a compiled AST bytecode of the code conforming to the first programming language, wherein the generating comprises:

generating a plurality of constructs for each property;

tracking each property with a tuple;

generating a closure method with the property;

invoking the closure method;

revoking the closure method;

for the database query in the first programming language, wherein the database query includes one or more expressions, performing the steps of:

unboxing the expression;

evaluating the one or more expressions to generate a results; and

storing results of the evolution in one or more temporary variables;

rewriting the form of the database query to refer to the one or more temporary variables; and

compiling the rewritten database query;

emitting the rewritten database query as a method invocation with a stringized form of the query;

storing a rewritten database query in a distributed caching system; and

executing the rewritten database query within an execution environment to provide functionality corresponding to the code conforming to the first programming language.

4. The method of claim 3 wherein the plurality of constructs comprise:

a field of a same type as the property on a type that defines the property;

a setter method that includes code to set the field; and

a getter method to get the field.

5. An article comprising a non-transitory computer-readable medium having stored thereon instructions that, when executed, cause one or more processors in a multitenant environment to:

receiving, with one or more processors, code conforming to a first programming language wherein the code conforming to the first programming language comprises on demand platform code capable of running without client-side servers or software where all values are reference types, the first programming language to be implemented as an abstract syntax tree (AST)-based language supporting an in-line version of a database query language, wherein the code conforming to the first programming language comprises at least a database query;

generating code conforming to a second programming language, wherein the code is a compiled AST bytecode of the code conforming to the first programming language, wherein the generating comprises:

generating a plurality of constructs for each property;

tracking each property with a tuple;

generating a closure method with the property;

for the database query in the first programming language, wherein the database query includes one or more expressions, performing the steps of:

unboxing the expression;

evaluating the one or more expressions to generate a results; and

storing results of the evolution in one or more temporary variables;

rewriting the form of the database query to refer to the one or more temporary variables; and

compiling the rewritten database query;

emitting the rewritten database query as a method invocation with a stringized form of the query;

storing a rewritten database query in a distributed caching system; and executing the rewritten database query within an execution environment to provide functionality corresponding to the code conforming to the first programming language.

6. The article of claim 5 further comprising instructions that, when executed, cause the one or more processors to:

identify intermediate values; and

eliminate boxing and unboxing for the intermediate values.

7. An article comprising a non-transitory computer-readable medium having stored thereon instructions that, when executed, cause one or more processors in a multitenant environment to:

receiving code conforming to a first programming language wherein the code conforming to the first programming language comprises on demand platform code capable of running without client-side servers or software where all values are reference types, the first programming language to be implemented as an abstract syntax tree (AST)-based language supporting an in-line version of a database query language, wherein the code conforming to the first programming language comprises at least a database query;

generating code conforming to a second programming language, wherein the code is a compiled AST bytecode of the code conforming to the first programming language, wherein the generating comprises:

generating a plurality of constructs for each property;

tracking each property with a tuple;

generating a closure method with the property;

invoking the closure method;

revoking the closure method;

for the database query in the first programming language, wherein the database query includes one or more expressions, performing the steps of:

unboxing the expression;

evaluating the one or more expressions to generate a results; and

storing results of the evolution in one or more temporary variables;

rewriting the form of the database query to refer to the one or more temporary variables; and

compiling the rewritten database query;

emitting the rewritten database query as a method invocation with a stringized form of the query;

storing a rewritten database query in a distributed caching system; and

executing the rewritten database query within an execution environment to provide functionality corresponding to the code conforming to the first programming language.

8. The article of claim 7 wherein the plurality of constructs comprise:

a field of a same type as the property on a type that defines the property;

a setter method that includes code to set the field; and

a getter method to get the field.