org.eclipse.persistence.oxm.mappings.XMLDirectMapping.getNullPolicy()方法的使用及代码示例

x33g5p2x  于2022-02-03 转载在 其他  
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本文整理了Java中org.eclipse.persistence.oxm.mappings.XMLDirectMapping.getNullPolicy()方法的一些代码示例，展示了XMLDirectMapping.getNullPolicy()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。XMLDirectMapping.getNullPolicy()方法的具体详情如下：
包路径：org.eclipse.persistence.oxm.mappings.XMLDirectMapping
类名称：XMLDirectMapping
方法名：getNullPolicy

XMLDirectMapping.getNullPolicy介绍

[英]INTERNAL: Get the AbstractNullPolicy from the Mapping.
The default policy is NullPolicy.
[中]内部：从映射中获取AbstractNullPolicy。
默认策略为NullPolicy。

代码示例

代码示例来源：origin: stackoverflow.com

import org.eclipse.persistence.config.DescriptorCustomizer;
import org.eclipse.persistence.descriptors.ClassDescriptor;
import org.eclipse.persistence.mappings.DatabaseMapping;
import org.eclipse.persistence.oxm.mappings.XMLDirectMapping;
import org.eclipse.persistence.oxm.mappings.nullpolicy.XMLNullRepresentationType;

public class AddressCustomizer implements DescriptorCustomizer {

  @Override
  public void customize(ClassDescriptor descriptor) throws Exception {
    for(DatabaseMapping mapping : descriptor.getMappings()) {
      if(mapping.isAbstractDirectMapping()) {
        XMLDirectMapping xmlDirectMapping = (XMLDirectMapping) mapping;
        xmlDirectMapping.getNullPolicy().setMarshalNullRepresentation(XMLNullRepresentationType.EMPTY_NODE);
        xmlDirectMapping.getNullPolicy().setNullRepresentedByEmptyNode(true);
      }
    }
  }

}

代码示例来源：origin: stackoverflow.com

import org.eclipse.persistence.descriptors.ClassDescriptor;
import org.eclipse.persistence.mappings.DatabaseMapping;
import org.eclipse.persistence.oxm.mappings.XMLDirectMapping;
import org.eclipse.persistence.oxm.mappings.nullpolicy.XMLNullRepresentationType;
import org.eclipse.persistence.sessions.*;

public class NullPolicySessionEventListener extends SessionEventAdapter {

  @Override
  public void preLogin(SessionEvent event) {
    Project project = event.getSession().getProject();
    for(ClassDescriptor descriptor : project.getOrderedDescriptors()) {
      for(DatabaseMapping mapping : descriptor.getMappings()) {
        if(mapping.isAbstractDirectMapping()) {
          XMLDirectMapping xmlDirectMapping = (XMLDirectMapping) mapping;
          xmlDirectMapping.getNullPolicy().setMarshalNullRepresentation(XMLNullRepresentationType.EMPTY_NODE);
          xmlDirectMapping.getNullPolicy().setNullRepresentedByEmptyNode(true);
        }
      }
    }
   }

}

代码示例来源：origin: org.eclipse.persistence/com.springsource.org.eclipse.persistence

public boolean isWhitespaceAware() {
  return !xmlDirectMapping.getNullPolicy().isNullRepresentedByEmptyNode();
}

代码示例来源：origin: org.eclipse.persistence/com.springsource.org.eclipse.persistence

public boolean isNullCapableValue() {
  return xmlDirectMapping.getNullPolicy().getIsSetPerformedForAbsentNode();
}

代码示例来源：origin: org.eclipse.persistence/com.springsource.org.eclipse.persistence

public void setXPathNode(XPathNode xPathNode) {
  super.setXPathNode(xPathNode);
  xmlDirectMapping.getNullPolicy().xPathNode(xPathNode, this);
}

代码示例来源：origin: org.eclipse.persistence/org.eclipse.persistence.core

public void writeSingleValue(Object value, Object parent, XMLRecord row, AbstractSession session) {
  Object fieldValue = getFieldValue(value, session, row);
  if(fieldValue == null && getNullPolicy() != null) {
    getNullPolicy().directMarshal((Field) this.getField(), row, parent);
  } else {
    writeValueIntoRow(row, getField(), fieldValue);
  }
}

代码示例来源：origin: com.haulmont.thirdparty/eclipselink

public void writeSingleValue(Object value, Object parent, XMLRecord row, AbstractSession session) {
  Object fieldValue = getFieldValue(value, session, row);
  if(fieldValue == null && getNullPolicy() != null) {
    getNullPolicy().directMarshal((Field) this.getField(), row, parent);
  } else {
    writeValueIntoRow(row, getField(), fieldValue);
  }
}

代码示例来源：origin: com.haulmont.thirdparty/eclipselink

/**
 * INTERNAL:
 * Return the mapping's attribute value from the row.
 * The execution session is passed for the case of building a UnitOfWork clone
 * directly from a row, the session set in the query will not know which platform to use
 * for converting the value.  Allows the correct session to be passed in.
 */
public Object valueFromRow(AbstractRecord row, JoinedAttributeManager joinManager, ObjectBuildingQuery query, CacheKey cacheKey, AbstractSession executionSession, boolean isTargetProtected, Boolean[] wasCacheUsed) {
  // PERF: Direct variable access.
  boolean shouldCheckForXsiNil = getNullPolicy().isNullRepresentedByXsiNil();
  return getAttributeValue(((DOMRecord)row).getIndicatingNoEntry(this.field, false, shouldCheckForXsiNil), executionSession, (XMLRecord)row);
}

代码示例来源：origin: org.eclipse.persistence/com.springsource.org.eclipse.persistence

/**
 * INTERNAL:
 * Return the mapping's attribute value from the row.
 * The execution session is passed for the case of building a UnitOfWork clone
 * directly from a row, the session set in the query will not know which platform to use
 * for converting the value.  Allows the correct session to be passed in.
 */
public Object valueFromRow(AbstractRecord row, JoinedAttributeManager joinManager, ObjectBuildingQuery query, AbstractSession executionSession) {
  // PERF: Direct variable access.
  boolean shouldCheckForXsiNil = getNullPolicy().isNullRepresentedByXsiNil();
  return getAttributeValue(((DOMRecord)row).getIndicatingNoEntry(this.field, false, shouldCheckForXsiNil), executionSession, (XMLRecord)row);
}

代码示例来源：origin: org.eclipse.persistence/org.eclipse.persistence.core

/**
 * INTERNAL:
 * Return the mapping's attribute value from the row.
 * The execution session is passed for the case of building a UnitOfWork clone
 * directly from a row, the session set in the query will not know which platform to use
 * for converting the value.  Allows the correct session to be passed in.
 */
public Object valueFromRow(AbstractRecord row, JoinedAttributeManager joinManager, ObjectBuildingQuery query, CacheKey cacheKey, AbstractSession executionSession, boolean isTargetProtected, Boolean[] wasCacheUsed) {
  // PERF: Direct variable access.
  boolean shouldCheckForXsiNil = getNullPolicy().isNullRepresentedByXsiNil();
  return getAttributeValue(((DOMRecord)row).getIndicatingNoEntry(this.field, false, shouldCheckForXsiNil), executionSession, (XMLRecord)row);
}

代码示例来源：origin: org.eclipse.persistence/com.springsource.org.eclipse.persistence

containerAttributeMapping.setSetMethodName("setContainerAttributeName");
containerAttributeMapping.setXPath("container-attribute/text()");
((NullPolicy)containerAttributeMapping.getNullPolicy()).setSetPerformedForAbsentNode(false);
descriptor.addMapping(containerAttributeMapping);
containerGetMethodMapping.setSetMethodName("setContainerGetMethodName");
containerGetMethodMapping.setXPath("container-get-method/text()");
((NullPolicy)containerGetMethodMapping.getNullPolicy()).setSetPerformedForAbsentNode(false);
descriptor.addMapping(containerGetMethodMapping);
containerSetMethodMapping.setSetMethodName("setContainerSetMethodName");
containerSetMethodMapping.setXPath("container-set-method/text()");
((NullPolicy)containerSetMethodMapping.getNullPolicy()).setSetPerformedForAbsentNode(false);
descriptor.addMapping(containerSetMethodMapping);

代码示例来源：origin: com.haulmont.thirdparty/eclipselink

containerAttributeMapping.setSetMethodName("setContainerAttributeName");
containerAttributeMapping.setXPath("container-attribute/text()");
((NullPolicy)containerAttributeMapping.getNullPolicy()).setSetPerformedForAbsentNode(false);
descriptor.addMapping(containerAttributeMapping);
containerGetMethodMapping.setSetMethodName("setContainerGetMethodName");
containerGetMethodMapping.setXPath("container-get-method/text()");
((NullPolicy)containerGetMethodMapping.getNullPolicy()).setSetPerformedForAbsentNode(false);
descriptor.addMapping(containerGetMethodMapping);
containerSetMethodMapping.setSetMethodName("setContainerSetMethodName");
containerSetMethodMapping.setXPath("container-set-method/text()");
((NullPolicy)containerSetMethodMapping.getNullPolicy()).setSetPerformedForAbsentNode(false);
descriptor.addMapping(containerSetMethodMapping);

代码示例来源：origin: org.eclipse.persistence/org.eclipse.persistence.core

containerAttributeMapping.setSetMethodName("setContainerAttributeName");
containerAttributeMapping.setXPath("container-attribute/text()");
((NullPolicy)containerAttributeMapping.getNullPolicy()).setSetPerformedForAbsentNode(false);
descriptor.addMapping(containerAttributeMapping);
containerGetMethodMapping.setSetMethodName("setContainerGetMethodName");
containerGetMethodMapping.setXPath("container-get-method/text()");
((NullPolicy)containerGetMethodMapping.getNullPolicy()).setSetPerformedForAbsentNode(false);
descriptor.addMapping(containerGetMethodMapping);
containerSetMethodMapping.setSetMethodName("setContainerSetMethodName");
containerSetMethodMapping.setXPath("container-set-method/text()");
((NullPolicy)containerSetMethodMapping.getNullPolicy()).setSetPerformedForAbsentNode(false);
descriptor.addMapping(containerSetMethodMapping);

代码示例来源：origin: org.eclipse.persistence/org.eclipse.persistence.sdo

mapping.getNullPolicy().setNullRepresentedByEmptyNode(false);
mapping.getNullPolicy().setNullRepresentedByEmptyNode(true);

代码示例来源：origin: com.haulmont.thirdparty/eclipselink

mapping.getNullPolicy().setNullRepresentedByEmptyNode(false);
mapping.getNullPolicy().setNullRepresentedByEmptyNode(true);

代码示例来源：origin: org.eclipse.persistence/org.eclipse.persistence.core

containerAttributeMapping.setSetMethodName("setContainerAttributeName");
containerAttributeMapping.setXPath("container-attribute/text()");
((NullPolicy)containerAttributeMapping.getNullPolicy()).setSetPerformedForAbsentNode(false);
descriptor.addMapping(containerAttributeMapping);
containerGetMethodMapping.setSetMethodName("setContainerGetMethodName");
containerGetMethodMapping.setXPath("container-get-method/text()");
((NullPolicy)containerGetMethodMapping.getNullPolicy()).setSetPerformedForAbsentNode(false);
descriptor.addMapping(containerGetMethodMapping);
containerSetMethodMapping.setSetMethodName("setContainerSetMethodName");
containerSetMethodMapping.setXPath("container-set-method/text()");
((NullPolicy)containerSetMethodMapping.getNullPolicy()).setSetPerformedForAbsentNode(false);
descriptor.addMapping(containerSetMethodMapping);

代码示例来源：origin: org.eclipse.persistence/com.springsource.org.eclipse.persistence

public boolean marshalSingleValue(XPathFragment xPathFragment, MarshalRecord marshalRecord, Object object, Object objectValue, AbstractSession session, NamespaceResolver namespaceResolver, MarshalContext marshalContext) {
  Object fieldValue = xmlDirectMapping.getFieldValue(objectValue, session, marshalRecord);
  // Check for a null value 
  if (null == fieldValue) {
    // Perform marshal operations based on the null policy
    return xmlDirectMapping.getNullPolicy().directMarshal(xPathFragment, marshalRecord, object, session, namespaceResolver);
  } else {
    QName schemaType = getSchemaType((XMLField) xmlDirectMapping.getField(), fieldValue, session);
    String stringValue = getValueToWrite(schemaType, fieldValue, (XMLConversionManager) session.getDatasourcePlatform().getConversionManager(), namespaceResolver);
    XPathFragment groupingFragment = marshalRecord.openStartGroupingElements(namespaceResolver);
    if (xPathFragment.isAttribute()) {
      marshalRecord.attribute(xPathFragment, namespaceResolver, stringValue);
      marshalRecord.closeStartGroupingElements(groupingFragment);
    } else {
      marshalRecord.closeStartGroupingElements(groupingFragment);
      if (xmlDirectMapping.isCDATA()) {
        marshalRecord.cdata(stringValue);
      } else {
        marshalRecord.characters(stringValue);
      }
    }
    return true;
  }
}

代码示例来源：origin: org.eclipse.persistence/com.springsource.org.eclipse.persistence

protected ClassDescriptor buildDatabaseFieldDescriptor() {
  XMLDescriptor descriptor = new XMLDescriptor();
  descriptor.setJavaClass(DatabaseField.class);
  descriptor.setDefaultRootElement("field");
  descriptor.getInheritancePolicy().setClassIndicatorField(new XMLField("@xsi:type"));
  descriptor.getInheritancePolicy().addClassIndicator(DatabaseField.class, getSecondaryNamespaceXPath() + "column");
  descriptor.getInheritancePolicy().addClassIndicator(XMLField.class, getPrimaryNamespaceXPath() + "node");
  descriptor.getInheritancePolicy().addClassIndicator(XMLUnionField.class, getPrimaryNamespaceXPath() + "union-node");
  XMLDirectMapping tableMapping = new XMLDirectMapping();
  tableMapping.setAttributeName("table");
  tableMapping.setGetMethodName("getTableName");
  tableMapping.setSetMethodName("setTableName");
  tableMapping.setXPath("@table");
  tableMapping.setNullValue("");
  descriptor.addMapping(tableMapping);
  XMLDirectMapping nameMapping = new XMLDirectMapping();
  nameMapping.setAttributeName("name");
  nameMapping.setGetMethodName("getName");
  nameMapping.setSetMethodName("setName");
  nameMapping.setXPath("@name");
  nameMapping.getNullPolicy().setNullRepresentedByEmptyNode(false);
  descriptor.addMapping(nameMapping);
  return descriptor;
}

代码示例来源：origin: org.eclipse.persistence/org.eclipse.persistence.core

protected ClassDescriptor buildDatabaseFieldDescriptor() {
  XMLDescriptor descriptor = new XMLDescriptor();
  descriptor.setJavaClass(DatabaseField.class);
  descriptor.setDefaultRootElement("field");
  descriptor.getInheritancePolicy().setClassIndicatorField(new XMLField("@xsi:type"));
  descriptor.getInheritancePolicy().addClassIndicator(DatabaseField.class, getSecondaryNamespaceXPath() + "column");
  descriptor.getInheritancePolicy().addClassIndicator(XMLField.class, getPrimaryNamespaceXPath() + "node");
  descriptor.getInheritancePolicy().addClassIndicator(XMLUnionField.class, getPrimaryNamespaceXPath() + "union-node");
  XMLSchemaReference reference = new XMLSchemaClassPathReference();
  reference.setSchemaContext("/"+ getSecondaryNamespaceXPath() + "column");
  descriptor.setSchemaReference(reference);
  XMLDirectMapping tableMapping = new XMLDirectMapping();
  tableMapping.setAttributeName("table");
  tableMapping.setGetMethodName("getTableName");
  tableMapping.setSetMethodName("setTableName");
  tableMapping.setXPath("@table");
  tableMapping.setNullValue("");
  descriptor.addMapping(tableMapping);
  XMLDirectMapping nameMapping = new XMLDirectMapping();
  nameMapping.setAttributeName("name");
  nameMapping.setGetMethodName("getName");
  nameMapping.setSetMethodName("setName");
  nameMapping.setXPath("@name");
  nameMapping.getNullPolicy().setNullRepresentedByEmptyNode(false);
  descriptor.addMapping(nameMapping);
  return descriptor;
}

代码示例来源：origin: com.haulmont.thirdparty/eclipselink

protected ClassDescriptor buildDatabaseFieldDescriptor() {
  XMLDescriptor descriptor = new XMLDescriptor();
  descriptor.setJavaClass(DatabaseField.class);
  descriptor.setDefaultRootElement("field");
  descriptor.getInheritancePolicy().setClassIndicatorField(new XMLField("@xsi:type"));
  descriptor.getInheritancePolicy().addClassIndicator(DatabaseField.class, getSecondaryNamespaceXPath() + "column");
  descriptor.getInheritancePolicy().addClassIndicator(XMLField.class, getPrimaryNamespaceXPath() + "node");
  descriptor.getInheritancePolicy().addClassIndicator(XMLUnionField.class, getPrimaryNamespaceXPath() + "union-node");
  XMLSchemaReference reference = new XMLSchemaClassPathReference();
  reference.setSchemaContext("/"+ getSecondaryNamespaceXPath() + "column");
  descriptor.setSchemaReference(reference);
  
  XMLDirectMapping tableMapping = new XMLDirectMapping();
  tableMapping.setAttributeName("table");
  tableMapping.setGetMethodName("getTableName");
  tableMapping.setSetMethodName("setTableName");
  tableMapping.setXPath("@table");
  tableMapping.setNullValue("");
  descriptor.addMapping(tableMapping);
  XMLDirectMapping nameMapping = new XMLDirectMapping();
  nameMapping.setAttributeName("name");
  nameMapping.setGetMethodName("getName");
  nameMapping.setSetMethodName("setName");
  nameMapping.setXPath("@name");
  nameMapping.getNullPolicy().setNullRepresentedByEmptyNode(false);
  descriptor.addMapping(nameMapping);
  return descriptor;
}

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