PRD.util.coerceToString should return default value on empty strings and arrays

[fernandofreitasdh]

v1.0.3 - proposed changed code:

function coerceToString( input, defVal ) { var ret = '', str; /* Throughout this function String() is used to guarantee that the string generated

• is an ECMA string. This is only a concern on the workflow engine since the engine
• allows a mix of ECMA and Java code. Returning a Java string will cause the
• toJSON() function to fail when using JSON.stringify(), hence this safety. */ if ( defVal != null && typeof defVal === 'string' ) { ret = String( defVal ); } if ( input === null || input === undefined ) { return ret; } if ( typeof input === 'string' || typeof input === 'number' || typeof input === 'boolean' ) { str = String( input ); } if ( input instanceof Array ) { str = String( input.join( ' ' ) ); } if ( str !== '' ) { ret = str; } return ret; }

[fchierad]

Added proposed code to branch 1.0.4wip .