com.atlassian.jira.dev.jql.function
Class EchoFunction

java.lang.Object
  extended by com.atlassian.jira.plugin.jql.function.AbstractJqlFunction
      extended by com.atlassian.jira.dev.jql.function.EchoFunction
All Implemented Interfaces:
JqlFunction

public class EchoFunction
extends AbstractJqlFunction
implements JqlFunction

Simple function that simply echos its input parameters as its output parameters.

Since:
v4.0

Field Summary
static String EMPTY_ESCAPED
           
static String EMPTY_FLAG
           
 
Constructor Summary
EchoFunction()
           
 
Method Summary
 JiraDataType getDataType()
          Provides the JiraDataType that this function handles and creates values for.
 int getMinimumNumberOfExpectedArguments()
          This method must return the number of arguments that the function expects to perform its operation correctly.
 List<QueryLiteral> getValues(QueryCreationContext queryCreationContext, FunctionOperand operand, TerminalClause terminalClause)
          Gets the unexpanded values provided by the user on input.
 MessageSet validate(com.atlassian.crowd.embedded.api.User searcher, FunctionOperand operand, TerminalClause terminalClause)
          Will validate the function operand's arguments and report back any errors.
 
Methods inherited from class com.atlassian.jira.plugin.jql.function.AbstractJqlFunction
getFunctionName, getI18n, getModuleDescriptor, init, isList, validateNumberOfArgs
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 
Methods inherited from interface com.atlassian.jira.plugin.jql.function.JqlFunction
getFunctionName, init, isList
 

Field Detail

EMPTY_FLAG

public static final String EMPTY_FLAG
See Also:
Constant Field Values

EMPTY_ESCAPED

public static final String EMPTY_ESCAPED
See Also:
Constant Field Values
Constructor Detail

EchoFunction

public EchoFunction()
Method Detail

validate

public MessageSet validate(com.atlassian.crowd.embedded.api.User searcher,
                           FunctionOperand operand,
                           TerminalClause terminalClause)
Description copied from interface: JqlFunction
Will validate the function operand's arguments and report back any errors.

Specified by:
validate in interface JqlFunction
Parameters:
searcher - the user performing the search
operand - the operand to validate
terminalClause - the terminal clause that contains the operand
Returns:
a MessageSet which will contain any validation errors or warnings or will be empty if there is nothing to report; never null.

getValues

public List<QueryLiteral> getValues(QueryCreationContext queryCreationContext,
                                    FunctionOperand operand,
                                    TerminalClause terminalClause)
Description copied from interface: JqlFunction

Gets the unexpanded values provided by the user on input. This is the output values that will later be transformed into index values.

For example, a function who returns all the released versions of a specified project should return QueryLiterals representing the ids of those versions. For correctness, always opt to return the most specific identifier for the object; if you can return either the id (which is stored in the index) or a string name (that would require resolving to get the index value), choose the id.

Specified by:
getValues in interface JqlFunction
Parameters:
queryCreationContext - the context of query creation
operand - the operand to get values from
terminalClause - the terminal clause that contains the operand
Returns:
a List of objects that represent this Operands raw values. Cannot be null.

getMinimumNumberOfExpectedArguments

public int getMinimumNumberOfExpectedArguments()
Description copied from interface: JqlFunction
This method must return the number of arguments that the function expects to perform its operation correctly. If the function can accept a variable number of arguments this value should be the lower limit. It is perfectly legal for a function to take no arguments and return 0 for this method.

Specified by:
getMinimumNumberOfExpectedArguments in interface JqlFunction
Returns:
the number of arguments that the function expects to perform its operation correctly. Must be >=0.

getDataType

public JiraDataType getDataType()
Description copied from interface: JqlFunction
Provides the JiraDataType that this function handles and creates values for. This allows us to infer some information about how it will interact with other elements in the system.

For example, if this returns JiraDataTypes.DATE then we know that we can provide values for any clauses that also specify a data type of DATE.

Specified by:
getDataType in interface JqlFunction
Returns:
the JiraDataType that this function produces values for. Cannot be null.
See Also:
JiraDataTypes


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