import org.activiti.engine.impl.variable.ValueFields; //导入依赖的package包/类
@Override
public void setValue(Object value, ValueFields valueFields)
{
    if (value != null) 
    {
        if (!(value instanceof ActivitiScriptNodeList)) 
        {
            throw new ActivitiException("Passed value is not an instance of ActivitiScriptNodeList, cannot set variable value.");
        }
       
        // Extract all node references
        List<NodeRef> nodeRefs = ((ActivitiScriptNodeList) value).getNodeReferences();
        // Save the list as a serializable
        super.setValue(nodeRefs, valueFields);
    }
}
 

import org.activiti.engine.impl.variable.ValueFields; //导入依赖的package包/类
@Override
@SuppressWarnings("unchecked")
public Object getValue(ValueFields valueFields)
{
    Object serializable = super.getValue(valueFields);
    if (serializable == null)
    {
        return null;
    }
    
    if (!(serializable instanceof List<?>))
    {
        throw new ActivitiException("Serializable stored in variable is not instance of List<NodeRef>, cannot get value.");
    }
    
    ActivitiScriptNodeList scriptNodes = new ActivitiScriptNodeList();
    // Wrap all node references in an ActivitiScriptNode
    List<NodeRef> nodeRefs =(List<NodeRef>) serializable;
    for (NodeRef ref : nodeRefs) 
    {
        scriptNodes.add(new ActivitiScriptNode(ref, serviceRegistry));
    }
    return scriptNodes;
}
 

import org.activiti.engine.impl.variable.ValueFields; //导入依赖的package包/类
@Override
public void setValue(Object value, ValueFields valueFields) 
{
    if(value != null && ((String) value).length() > MAX_TEXT_LENGTH) 
    {
        byte[] bytes = ((String) value).getBytes();
        valueFields.setBytes(bytes);
    }
    else {
        // Make sure NO byte-array is present anymore in case this variable exceeded the 
        // length before this update, but is shorter now
        valueFields.setBytes(null);

        // Revert to storing regular string
        super.setValue(value, valueFields);
    }
}
 

import org.activiti.engine.impl.variable.ValueFields; //导入依赖的package包/类
@Override
public void setValue(Object value, ValueFields valueFields)
{
    String textValue = null;
    if (value != null) 
    {
        if (!(value instanceof ActivitiScriptNode)) 
        {
            throw new ActivitiException("Passed value is not an instance of ActivitiScriptNode, cannot set variable value.");
        }
        NodeRef reference = (((ActivitiScriptNode)value).getNodeRef());
        if (reference != null)
        {
            // Use the string representation of the NodeRef
            textValue = reference.toString();             
        }
    }
    valueFields.setTextValue(textValue);
}
 

import org.activiti.engine.impl.variable.ValueFields; //导入依赖的package包/类
@Override
public void setValue(Object obj, ValueFields valueFields) {
    if (obj != null && obj instanceof XMLDocument) {
        try {

            valueFields.setTextValue(Utils.stringify((XMLDocument) obj));

        } catch (TransformerException e) {
            //since error occurred while transformation, set the variable value to null
            valueFields.setTextValue(null);
            log.error("Error occurred while converting XMLDocument to String", e);
        }
    } else {
        valueFields.setTextValue(null);
    }
}
 

import org.activiti.engine.impl.variable.ValueFields; //导入依赖的package包/类
@Override
public Object getValue(ValueFields valueFields) 
{
    // In case the string is stored as a byte-array, create a string from the stored bytes
    // using platform encoding and return this instead of the text-value
    if(valueFields.getBytes() != null) {
        return new String(valueFields.getBytes());
    }
    return super.getValue(valueFields);
}
 

import org.activiti.engine.impl.variable.ValueFields; //导入依赖的package包/类
@Override
public Object getValue(ValueFields valueFields) {
    JsonNode jsonValue = null;
    if (valueFields.getTextValue() != null && valueFields.getTextValue().length() > 0) {
        try {
            jsonValue = objectMapper.readTree(valueFields.getTextValue());
            return new JsonNodeObject(jsonValue);
        } catch (Exception e) {
            //Since we cannot throw exception here, simply log the error and return null
            log.error("Error reading json variable " + valueFields.getName(), e);
        }
    }
    return jsonValue;
}
 

import org.activiti.engine.impl.variable.ValueFields; //导入依赖的package包/类
@Override
public void setValue(Object o, ValueFields valueFields) {
  // ensure calling setBytes multiple times no longer causes any problems 
  valueFields.setBytes(new byte[] { 1, 2, 3} );
  valueFields.setBytes(null);
  valueFields.setBytes(new byte[] { 4, 5, 6} );
  
  byte[] value = (o == null ? null : ((CustomType) o).getValue());
  valueFields.setBytes(value);
}
 

import org.activiti.engine.impl.variable.ValueFields; //导入依赖的package包/类
@Override
public Object getValue(ValueFields valueFields) {
	return valueFields.getTextValue2();
}
 

import org.activiti.engine.impl.variable.ValueFields; //导入依赖的package包/类
@Override
public void setValue(Object value, ValueFields valueFields) {
	valueFields.setTextValue(value.toString());
	valueFields.setTextValue2(value.toString());
}
 

import org.activiti.engine.impl.variable.ValueFields; //导入依赖的package包/类
@Override
public void setValue(Object obj, ValueFields valueFields) {
    valueFields.setTextValue((obj != null && obj instanceof JsonNodeObject &&
                                        ((JsonNodeObject)obj).unwrap() != null) ? obj.toString() : null);
}
 

import org.activiti.engine.impl.variable.ValueFields; //导入依赖的package包/类
@Override
public Object getValue(ValueFields valueFields) {
  byte[] bytes = valueFields.getBytes();
  return bytes == null ? null : new CustomType(bytes);
}