org.protelis.vm

Interface ExecutionEnvironment

All Known Implementing Classes:

SimpleExecutionEnvironment

public interface ExecutionEnvironment

The ExecutionEnvironment is responsible of managing environment variables.

Method Summary

Modifier and Type	Method and Description
void	commit() Called just after the VM is executed, to finalize information of the execution for the environment.
java.lang.Object	get(java.lang.String id)
java.lang.Object	get(java.lang.String id, java.lang.Object defaultValue)
boolean	has(java.lang.String id)
java.util.Set<java.lang.String>	keySet()
boolean	put(java.lang.String id, java.lang.Object v)
java.lang.Object	remove(java.lang.String id)
void	setup() Called just before the VM is executed, to enable and preparations needed in the environment.

Method Detail

has

boolean has(java.lang.String id)

Parameters:

id - the variable name

Returns:

true if the variable is present

get

java.lang.Object get(java.lang.String id)

Parameters:

id - the variable name

Returns:

the value of the variable if present, false otherwise

get

java.lang.Object get(java.lang.String id,
                     java.lang.Object defaultValue)

Parameters:

id - the variable name

defaultValue - a parameterizable default value

Returns:

the value of the variable if present, defaultValue otherwise

put

boolean put(java.lang.String id,
            java.lang.Object v)

Parameters:

id - the variable name

v - the value that should be associated with id

Returns:

true if there was previously a value associated with id, and false if not.

remove

java.lang.Object remove(java.lang.String id)

Parameters:

id - the variable name

Returns:

Returns the value to which this map previously associated the key, or null if the map contained no mapping for the key.

keySet

java.util.Set<java.lang.String> keySet()

Returns:

An unmodifiable set of the keys in the ExecutionEnvironment

commit

void commit()

Called just after the VM is executed, to finalize information of the execution for the environment.

setup

void setup()

Called just before the VM is executed, to enable and preparations needed in the environment.