__ACVFROMDC

java.lang.Object
- be.SIRAPRISE.server.__ACVFROMDC_STRING

```
public final class __ACVFROMDC_STRING
extends java.lang.Object
```
An operator needed for the internal operation of the server

Author:

Erwin Smout

See Also:

Serialized Form

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`ValueBuffer`	`executeOperator(java.util.LinkedList<ValueBuffer> args)` Performs the actual logic of the operator.
`ValueBuffer`	`executeOperator(java.util.LinkedList<ValueBuffer> args, be.SIRAPRISE.server.Luw luw)` Performs the actual logic of the operator.
`java.lang.String[]`	`getArgumentTypeNames()` Gets the list of names of types of the needed argument values
`static __ACVFROMDC_STRING`	`getInstance()` Gets the instance
`TypeDeclaration`	`getReturnTypeDeclaration()` Gets the full type declaration of the type of the return value.
`java.lang.String`	`getReturnTypeName()` Gets the name of the type of the return value
`java.lang.String`	`getSignature()` Gets the name of the operator implemented by this implementation object
`boolean`	`isDeterministic()` Tells whether the operator is deterministic with respect to the arguments of its invocations.
`void`	`readExternal(java.io.ObjectInput in)`
`void`	`writeExternal(java.io.ObjectOutput out)`

Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - getInstance
```
public static final __ACVFROMDC_STRING getInstance()
```
    Gets the instance
    
    Returns:
    
    the instance.
  - executeOperator
```
public ValueBuffer executeOperator(java.util.LinkedList<ValueBuffer> args)
```
    Description copied from interface: OperatorImplementation_V0104
    
    Performs the actual logic of the operator.
    
    Parameters:
    
    args - the argument list. The list must hold as many ValueBuffer objects as there are arguments to the operator, and each ValueBuffer object holds a value for some argument to the operator. ValueBuffer objects on the list must appear in the same order as the operator argument declarations. Implementations have the option, but are not required, to do a check the conformance of the argument list (the argument count, notably) to the operator signature.
    
    Returns:
    
    A ValueBuffer object holding the result value of the operator execution in internal format.
  - executeOperator
```
public ValueBuffer executeOperator(java.util.LinkedList<ValueBuffer> args,
                                   be.SIRAPRISE.server.Luw luw)
```
    Performs the actual logic of the operator.
    
    Parameters:
    
    args - the argument list. The list must hold as many ValueBuffer objects as there are arguments to the operator, and each ValueBuffer object holds a value for some argument to the operator. ValueBuffer objects on the list must appear in the same order as the operator argument declarations.
    
    luw - the luw that allows access to database operations, should they be needed for execution of the operator
    
    Returns:
    
    A ValueBuffer object holding the result value of the operator execution in internal format.
  - getArgumentTypeNames
```
public java.lang.String[] getArgumentTypeNames()
```
    Description copied from interface: OperatorImplementation_V0104
    
    Gets the list of names of types of the needed argument values
    
    Returns:
    
    The names of the argument types
  - getReturnTypeDeclaration
```
public TypeDeclaration getReturnTypeDeclaration()
```
    Description copied from interface: OperatorImplementation_V0105
    
    Gets the full type declaration of the type of the return value. Differs from the _V0104 getReturnTypeName() in that for nonscalar return types, this method also returns the heading, not just only the RELATION or TUPLE typename.
    
    Returns:
    
    the full type declaration of the type of the return value
  - getReturnTypeName
```
public java.lang.String getReturnTypeName()
```
    Description copied from interface: OperatorImplementation_V0104
    
    Gets the name of the type of the return value
    
    Returns:
    
    the name of the type of the return value
  - getSignature
```
public java.lang.String getSignature()
```
    Description copied from interface: OperatorImplementation_V0104
    
    Gets the name of the operator implemented by this implementation object
    
    Returns:
    
    the name of the operator implemented by this implementation object
  - isDeterministic
```
public boolean isDeterministic()
```
    Description copied from interface: OperatorImplementation_V0104
    
    Tells whether the operator is deterministic with respect to the arguments of its invocations. An operator is deterministic if and only if for any two distinct invocations, if all the argument values are the same, then the result value returned will also be the same. An example of a nondeterministic operators is RANDOM().
    
    Returns:
    
    true if the operator is deterministic.
  - readExternal
```
public void readExternal(java.io.ObjectInput in)
```
  - writeExternal
```
public void writeExternal(java.io.ObjectOutput out)
```

Class __ACVFROMDC_STRING

Method Summary

Methods inherited from class java.lang.Object

Method Detail

getInstance

executeOperator

executeOperator

getArgumentTypeNames

getReturnTypeDeclaration

getReturnTypeName

getSignature

isDeterministic

readExternal

writeExternal