org.apache.cayenne.util.Util.isEmptyString()方法的使用及代码示例

x33g5p2x  于2022-02-01 转载在 其他  
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本文整理了Java中org.apache.cayenne.util.Util.isEmptyString()方法的一些代码示例，展示了Util.isEmptyString()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.isEmptyString()方法的具体详情如下：
包路径：org.apache.cayenne.util.Util
类名称：Util
方法名：isEmptyString

Util.isEmptyString介绍

[英]Returns true, if the String is null or an empty string.
[中]如果字符串为null或空字符串，则返回true。

代码示例

代码示例来源：origin: org.apache.cayenne.modeler/cayenne-modeler

public String getColumnName(int column) {
  // per CAY-513 - if an empty string is passed for header, table header will
  // have zero height on Windows... So we have to check for this condition
  return Util.isEmptyString(headers[column]) ? " " : headers[column];
}

代码示例来源：origin: org.apache.cayenne/cayenne-server

/**
 *
 * @return package + "." + name when it is possible otherwise just name
 *
 * @since 4.0
 */
public static String getNameWithPackage(String pack, String name) {
  if (Util.isEmptyString(pack)) {
    return name;
  } else {
    return pack + (pack.endsWith(".") ? ""  : ".") + name;
  }
}

代码示例来源：origin: org.apache.cayenne.modeler/cayenne-modeler

public File getFile() {
  String value = fileName.getText();
  if (Util.isEmptyString(value)) {
    return null;
  }
  File file = new File(value);
  if (existingOnly && !file.exists()) {
    return null;
  }
  return file;
}

代码示例来源：origin: org.apache.cayenne/cayenne-nodeps

String buildExceptionMessage(String message, Throwable th) {
  StringBuffer buffer = new StringBuffer(message);
  buffer.append(". URL - ").append(url);
  String thMessage = th.getMessage();
  if (!Util.isEmptyString(thMessage)) {
    buffer.append("; CAUSE - ").append(thMessage);
  }
  return buffer.toString();
}

代码示例来源：origin: org.apache.cayenne/cayenne-server

/**
 * Configures an "extra" path that will resolve to an extra column (or columns) in the
 * result set.
 * 
 * @param path A valid path expression. E.g. "abc" or "db:ABC" or "abc.xyz".
 * @since 1.2
 */
public void addResultPath(String path) {
  if (Util.isEmptyString(path)) {
    throw new IllegalArgumentException("Invalid path: " + path);
  }
  nonNullResultPaths().add(path);
}

代码示例来源：origin: org.apache.cayenne/cayenne-nodeps

/**
 * Configures an "extra" path that will resolve to an extra column (or columns) in the
 * result set.
 * 
 * @param path A valid path expression. E.g. "abc" or "db:ABC" or "abc.xyz".
 * @since 1.2
 */
public void addResultPath(String path) {
  if (Util.isEmptyString(path)) {
    throw new IllegalArgumentException("Invalid path: " + path);
  }
  nonNullResultPaths().add(path);
}

代码示例来源：origin: org.apache.cayenne/cayenne-nodeps

/**
 * Decodes the String (assuming it is using Base64 encoding), and then deserializes
 * object from the byte array.
 */
static Object deserializeFromString(String string) throws Exception {
  if (Util.isEmptyString(string)) {
    return null;
  }
  byte[] bytes = Base64Codec.decodeBase64(string.getBytes());
  ObjectInputStream in = new ObjectInputStream(new ByteArrayInputStream(bytes));
  Object object = in.readObject();
  in.close();
  return object;
}

代码示例来源：origin: org.apache.cayenne/cayenne-server

/**
 * Looks up an existing node in the tree desribed by the dot-separated path.
 * Will return null if no matching child exists.
 */
public PrefetchTreeNode getNode(String path) {
  if (Util.isEmptyString(path)) {
    throw new IllegalArgumentException("Empty path: " + path);
  }
  PrefetchTreeNode node = this;
  StringTokenizer toks = new StringTokenizer(path, Entity.PATH_SEPARATOR);
  while (toks.hasMoreTokens() && node != null) {
    String segment = toks.nextToken();
    node = node.getChild(segment);
  }
  return node;
}

代码示例来源：origin: org.apache.cayenne/cayenne-nodeps

protected void validateConnection(DataNode node, ProjectPath path, Validator validator) {
  String factory = node.getDataSourceFactory();
  // If direct factory, make sure the location is a valid file name.
  if (Util.isEmptyString(factory)) {
    validator.registerError("No DataSource factory.", path);
  }
  else if (!DriverDataSourceFactory.class.getName().equals(factory)) {
    String location = node.getDataSourceLocation();
    if (Util.isEmptyString(location)) {
      validator.registerError("DataNode has no location parameter.", path);
    }
  }
}

代码示例来源：origin: org.apache.cayenne/cayenne-project

void validateDefaultSQL(SQLTemplateDescriptor query, ValidationResult validationResult) {
  if (Util.isEmptyString(query.getSql())) {
    // see if there is at least one adapter-specific template...
    for (Map.Entry<String, String> entry : query.getAdapterSql().entrySet()) {
      if (!Util.isEmptyString(entry.getValue())) {
        return;
      }
    }
    addFailure(
        validationResult,
        query,
        "SQLTemplate query '%s' has no default SQL template",
        query.getName());
  }
}

代码示例来源：origin: org.apache.cayenne/cayenne-nodeps

protected void validateDefaultSQL(
    SQLTemplate query,
    ProjectPath path,
    Validator validator) {
  if (Util.isEmptyString(query.getDefaultTemplate())) {
    // see if there is at least one adapter-specific template...
    Iterator it = query.getTemplateKeys().iterator();
    while (it.hasNext()) {
      String key = (String) it.next();
      if (!Util.isEmptyString(query.getCustomTemplate(key))) {
        return;
      }
    }
    validator.registerWarning("Query has no default SQL template", path);
  }
}

代码示例来源：origin: org.apache.cayenne/cayenne-project

void validate(DataChannelDescriptor domain, ValidationResult validationResult) {

    String name = domain.getName();
    if (Util.isEmptyString(name)) {
      addFailure(validationResult, domain, "Unnamed DataDomain");
    }
  }
}

代码示例来源：origin: org.apache.cayenne/cayenne-project

void validateConnection(DataNodeDescriptor node, ValidationResult validationResult) {
  String factory = node.getDataSourceFactoryType();
  // TODO: andrus 03/10/2010 - null factory is allowed, however
  // 'getDataSourceDescriptor' must ne not null in this case
  if (factory != null
      && !XMLPoolingDataSourceFactory.class.getName().equals(factory)) {
    String parameters = node.getParameters();
    if (Util.isEmptyString(parameters)) {
      addFailure(
          validationResult,
          node,
          "DataNode has empty 'parameters' string");
    }
  }
}

代码示例来源：origin: org.apache.cayenne/cayenne-nodeps

public void addChild(PrefetchTreeNode child) {
  if (Util.isEmptyString(child.getName())) {
    throw new IllegalArgumentException("Child has no segmentPath: " + child);
  }
  if (child.getParent() != this) {
    child.getParent().removeChild(child.getName());
    child.parent = this;
  }
  if (children == null) {
    children = new ArrayList(4);
  }
  children.add(child);
}

代码示例来源：origin: org.apache.cayenne/cayenne-server

public void addChild(PrefetchTreeNode child) {
  if (Util.isEmptyString(child.getName())) {
    throw new IllegalArgumentException("Child has no segmentPath: " + child);
  }
  if (child.getParent() != this) {
    child.getParent().removeChild(child.getName());
    child.parent = this;
  }
  if (children == null) {
    children = new ArrayList<>(4);
  }
  children.add(child);
}

代码示例来源：origin: org.apache.cayenne/cayenne-project

void validate(EmbeddableAttribute attribute, ValidationResult validationResult) {

    // Must have name
    if (Util.isEmptyString(attribute.getName())) {
      addFailure(validationResult, attribute, "Unnamed EmbeddableAttribute");
    }

    // all attributes must have type
    if (Util.isEmptyString(attribute.getType())) {
      addFailure(
          validationResult,
          attribute,
          "EmbeddableAttribute '%s' has no type",
          attribute.getName());
    }
  }
}

代码示例来源：origin: org.apache.cayenne/cayenne-project

private void validateJavaPackage(DataMap map, ValidationResult validationResult) {
    String javaPackage = map.getDefaultPackage();

    if(Util.isEmptyString(javaPackage)) {
      addFailure(validationResult, map, "Java package is not set in DataMap '%s'", map.getName());
      return;
    }

    NameValidationHelper helper = NameValidationHelper.getInstance();
    String invalidChars = helper.invalidCharsInJavaClassName(javaPackage);
    if(invalidChars != null) {
      addFailure(validationResult, map, "DataMap '%s' Java package '%s' contains invalid characters: %s",
          map.getName(), javaPackage, invalidChars);
    }
  }
}

代码示例来源：origin: org.apache.cayenne/cayenne-project

void validate(ObjAttribute attribute, ValidationResult validationResult) {
  validateName(attribute, validationResult);
  // all attributes must have type
  if (Util.isEmptyString(attribute.getType())) {
    addFailure(validationResult, attribute,
        "ObjAttribute '%s' has no Java type",
        attribute.getName());
  }
  if (attribute instanceof EmbeddedAttribute) {
    validateEmbeddable((EmbeddedAttribute)attribute, validationResult);
  } else {
    validateDbAttribute(attribute, validationResult);
  }
  checkForDuplicates(attribute, validationResult);
  checkSuperEntityAttributes(attribute, validationResult);
}

代码示例来源：origin: org.apache.cayenne.modeler/cayenne-modeler

protected void initBindings() {
  // bind actions
  BindingBuilder builder = new BindingBuilder(
      getApplication().getBindingFactory(),
      this);
  CayenneProjectPreferences cayPrPref = application.getCayenneProjectPreferences();
  this.preferences = (PreferenceDetail) cayPrPref.getProjectDetailObject(
      PreferenceDetail.class,
      getViewPreferences().node("controller"));
  if (Util.isEmptyString(preferences.getProperty("mode"))) {
    preferences.setProperty("mode", STANDARD_OBJECTS_MODE);
  }
  builder.bindToComboSelection(
      view.getGenerationMode(),
      "preferences.property['mode']").updateView();
}

代码示例来源：origin: org.apache.cayenne.modeler/cayenne-modeler

protected void updateSuperclass() {
  boolean doAll = isAllEntities();
  String defaultSuperclass = getSuperclass();
  for (ObjEntity entity : dataMap.getObjEntities()) {
    if (doAll || Util.isEmptyString(getSuperClassName(entity))) {
      if (!Util.nullSafeEquals(defaultSuperclass, getSuperClassName(entity))) {
        setSuperClassName(entity, defaultSuperclass);
        // any way to batch events, a big change will flood the app with
        // entity events..?
        mediator.fireDbEntityEvent(new EntityEvent(this, entity));
      }
    }
  }
  view.dispose();
}

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