本文整理了Java中org.dataconservancy.model.dcs.support.Util.isEmptyOrNull()方法的一些代码示例，展示了Util.isEmptyOrNull()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Util.isEmptyOrNull()方法的具体详情如下：
包路径：org.dataconservancy.model.dcs.support.Util
类名称：Util
方法名：isEmptyOrNull

Util.isEmptyOrNull介绍

[英]Returns true if s is empty or null.
[中]如果s为空或null，则返回true。

代码示例

代码示例来源：origin: org.dataconservancy.model/dcs-model

/**
 * Throws {@link IllegalArgumentException} if <code>s</code> is <code>null</code> or the empty string.
 *
 * @param s a string
 * @return the string
 */
static public String notEmptyOrNull(String s) {
  final String msg = "String must not be empty or null.";
  if (Util.isEmptyOrNull(s)) {
    throw new IllegalArgumentException(msg);
  }
  return s;
}

代码示例来源：origin: org.dataconservancy.dcs/dcs-ui-model-builder-xstream

@Override
public Object unmarshal(HierarchicalStreamReader reader,
            UnmarshallingContext context) {
  DateTime date = null;
  String value = reader.getValue();
  if (!isEmptyOrNull(value)) {
    date = fmt.parseDateTime(value);
  }
  return date;
}

代码示例来源：origin: org.dataconservancy.model/dcs-ui-model-builder-xstream

@Override
public Object unmarshal(HierarchicalStreamReader reader,
            UnmarshallingContext context) {
  DateTime date = null;
  String value = reader.getValue();
  if (!isEmptyOrNull(value)) {
    date = fmt.parseDateTime(value);
  }
  return date;
}

代码示例来源：origin: org.dataconservancy.model/dcs-ui-model-builder-xstream

@Override
public Object unmarshal(HierarchicalStreamReader reader,
            UnmarshallingContext context) {
  DateTime date = null;
  String value = reader.getValue();
  if (!isEmptyOrNull(value)) {
    date = fmt.parseDateTime(value);
  }
  return date;
}

代码示例来源：origin: org.dataconservancy.dcs/dcs-ui-model-builder-xstream

@Override
public Object unmarshal(HierarchicalStreamReader reader,
            UnmarshallingContext context) {
  DateTime date = null;
  String value = reader.getValue();
  if (!isEmptyOrNull(value)) {
    date = fmt.parseDateTime(value);
  }
  return date;
}

代码示例来源：origin: org.dataconservancy.dcs/dcs-gqm-builder-xstream

@Override
public Object unmarshal(HierarchicalStreamReader reader,
            UnmarshallingContext context) {
  String start = reader.getAttribute(A_START);
  String end = reader.getAttribute(A_END);
  
  long startVal = -1;
  if( !isEmptyOrNull(start)){
    startVal = Long.parseLong(start);
  }
  
  long endVal = -1;
  if( !isEmptyOrNull(end)){
    endVal = Long.parseLong(end);
  }
  DateTimeInterval interval = new DateTimeInterval(startVal, endVal);
  
  return interval;
}

代码示例来源：origin: org.dataconservancy.dcs/dcs-gqm-builder-xstream

@Override
public void marshal(Object source, HierarchicalStreamWriter writer, MarshallingContext context){
  super.marshal(source, writer, context);
  
  Relation relation = (Relation) source;
  
  if( !isEmptyOrNull(relation.getObject())) {
    writer.addAttribute(A_OBJECT, relation.getObject());
  }
  
  if( !isEmptyOrNull(relation.getPredicate().toString())){
    writer.addAttribute(A_PREDICATE, relation.getPredicate().toString());
  }        
}

代码示例来源：origin: org.dataconservancy.model/dcs-model-builder-xstream

@Override
public Object unmarshal(HierarchicalStreamReader reader, UnmarshallingContext context) {
  final DcsFixity fixity = new DcsFixity();
  final String algo = reader.getAttribute(A_ALGO);
  final String value = reader.getValue();
  // inside the <fixity> element
  if (!isEmptyOrNull(algo)) {
    fixity.setAlgorithm(algo);
  }
  if (!isEmptyOrNull(value)) {
    fixity.setValue(value);
  }
  return fixity;
}

代码示例来源：origin: org.dataconservancy.dcs/dcs-model-builder-xstream

@Override
public Object unmarshal(HierarchicalStreamReader reader, UnmarshallingContext context) {
  final DcsFixity fixity = new DcsFixity();
  final String algo = reader.getAttribute(A_ALGO);
  final String value = reader.getValue();
  // inside the <fixity> element
  if (!isEmptyOrNull(algo)) {
    fixity.setAlgorithm(algo);
  }
  if (!isEmptyOrNull(value)) {
    fixity.setValue(value);
  }
  return fixity;
}

代码示例来源：origin: org.dataconservancy.model/dcs-ui-model-builder-xstream

@Override
public void marshal(Object source, HierarchicalStreamWriter writer, MarshallingContext context) {
  super.marshal(source, writer, context);
  
  final Relationship relationship = (Relationship) source;
  
  if (!isEmptyOrNull(relationship.getSubject())) {
    writer.addAttribute(A_RELATIONSHIP_SUBJECT, relationship.getSubject());            
  }
  
  if (!isEmptyOrNull(relationship.getPredicate().toString())) {
    writer.addAttribute(A_RELATIONSHIP_PREDICATE, relationship.getPredicate().toString());
  }
  
  if (!isEmptyOrNull(relationship.getObject())) {
    writer.addAttribute(A_RELATIONSHIP_OBJECT, relationship.getObject());
  }
}

代码示例来源：origin: org.dataconservancy.dcs/dcs-ui-model-builder-xstream

@Override
public void marshal(Object source, HierarchicalStreamWriter writer, MarshallingContext context) {
  super.marshal(source, writer, context);
  
  final Relationship relationship = (Relationship) source;
  if (!isEmptyOrNull(relationship.getSubject())) {
    writer.addAttribute(A_RELATIONSHIP_SUBJECT, relationship.getSubject());            
  }
  
  if (!isEmptyOrNull(relationship.getPredicate().toString())) {
    writer.addAttribute(A_RELATIONSHIP_PREDICATE, relationship.getPredicate().toString());
  }
  
  if (!isEmptyOrNull(relationship.getObject())) {
    writer.addAttribute(A_RELATIONSHIP_OBJECT, relationship.getObject());
  }
}

代码示例来源：origin: org.dataconservancy.model/dcs-model-builder-xstream

@Override
public Object unmarshal(HierarchicalStreamReader reader, UnmarshallingContext context) {
  final DcsRelation rel = new DcsRelation();
  final String relUri = reader.getAttribute(A_REL);
  final String ref = reader.getAttribute(A_REF);
  if (!isEmptyOrNull(relUri)) {
    rel.setRelUri(relUri);
  }
  if (!isEmptyOrNull(ref)) {
    rel.setRef(new DcsEntityReference(ref));
  }
  return rel;
}

代码示例来源：origin: org.dataconservancy.dcs/dcs-model-builder-xstream

@Override
public Object unmarshal(HierarchicalStreamReader reader, UnmarshallingContext context) {
  final DcsRelation rel = new DcsRelation();
  final String relUri = reader.getAttribute(A_REL);
  final String ref = reader.getAttribute(A_REF);
  if (!isEmptyOrNull(relUri)) {
    rel.setRelUri(relUri);
  }
  if (!isEmptyOrNull(ref)) {
    rel.setRef(new DcsEntityReference(ref));
  }
  return rel;
}

代码示例来源：origin: org.dataconservancy.dcs/dcs-gqm-builder-xstream

@Override
public Object unmarshal(HierarchicalStreamReader reader,
            UnmarshallingContext context) {
  final String object = reader.getAttribute(A_OBJECT);
  URI predicate = null;
  
  if(!isEmptyOrNull(reader.getAttribute(A_PREDICATE))){
    try {
      predicate = new URI(reader.getAttribute(A_PREDICATE));
    } catch (URISyntaxException e) {
    }
  }
  
  return new Relation(predicate, object);
}

代码示例来源：origin: org.dataconservancy.dcs/dcs-model-builder-xstream

@Override
public void marshal(Object source, HierarchicalStreamWriter writer, MarshallingContext context) {
  super.marshal(source, writer, context);
  final DcsFixity fixity = (DcsFixity) source;
  if (!isEmptyOrNull(fixity.getAlgorithm())) {
    writer.addAttribute(A_ALGO, fixity.getAlgorithm());
  }
  
  if (!isEmptyOrNull(fixity.getValue())) {
    writer.setValue(fixity.getValue());
  }
}

代码示例来源：origin: org.dataconservancy.model/dcs-model-builder-xstream

@Override
public void marshal(Object source, HierarchicalStreamWriter writer, MarshallingContext context) {
  super.marshal(source, writer, context);
  final DcsFixity fixity = (DcsFixity) source;
  if (!isEmptyOrNull(fixity.getAlgorithm())) {
    writer.addAttribute(A_ALGO, fixity.getAlgorithm());
  }
  
  if (!isEmptyOrNull(fixity.getValue())) {
    writer.setValue(fixity.getValue());
  }
}

代码示例来源：origin: org.dataconservancy.dcs/dcs-pkg-model-builder-xstream

@Override
public void marshal(Object source, HierarchicalStreamWriter writer, MarshallingContext context) {
  super.marshal(source, writer, context);
  
  final Checksum checksum = (Checksum) source;
  
  if (!isEmptyOrNull(checksum.getAlgorithm())) {
    writer.addAttribute(A_ALGORITHM, checksum.getAlgorithm());            
  }
  
  if (!isEmptyOrNull(checksum.getValue())) {
    writer.addAttribute(A_VALUE, checksum.getValue());
  }
}

代码示例来源：origin: org.dataconservancy.dcs/dcs-pkg-model-builder-xstream

@Override
public void marshal(Object source, HierarchicalStreamWriter writer, MarshallingContext context) {
  super.marshal(source, writer, context);
  
  final Triple triple = (Triple) source;
  
  if (!isEmptyOrNull(triple.getSubject())) {
    writer.addAttribute(A_SUBJECT, triple.getSubject());            
  }
  
  if (!isEmptyOrNull(triple.getPredicate())) {
    writer.addAttribute(A_PREDICATE, triple.getPredicate());
  }
  
  if (!isEmptyOrNull(triple.getObject())) {
    writer.addAttribute(A_OBJECT, triple.getObject());
  }
}

代码示例来源：origin: org.dataconservancy.model/dcs-model-builder-xstream

@Override
public void marshal(Object source, HierarchicalStreamWriter writer, MarshallingContext context) {
  super.marshal(source, writer, context);
  final DcsRelation rel = (DcsRelation) source;
  if (rel.getRef() != null) {
    writer.addAttribute(A_REF, rel.getRef().getRef());
  }
  if (!isEmptyOrNull(rel.getRelUri())) {
    writer.addAttribute(A_REL, rel.getRelUri());
  }
}

代码示例来源：origin: org.dataconservancy.dcs/dcs-model-builder-xstream

@Override
public void marshal(Object source, HierarchicalStreamWriter writer, MarshallingContext context) {
  super.marshal(source, writer, context);
  final DcsRelation rel = (DcsRelation) source;
  if (rel.getRef() != null) {
    writer.addAttribute(A_REF, rel.getRef().getRef());
  }
  if (!isEmptyOrNull(rel.getRelUri())) {
    writer.addAttribute(A_REL, rel.getRelUri());
  }
}