我有一个关于通过inputStream名为 data 的类型的属性来过滤资源的 xpath 表达式的问题。如何进行文本搜索，例如这是有效的：
String xpath1 = "<my app path>//element(*, nt:resource) [jcr:contains(@jcr:mimeType,'*plain*')]";
String xpath2 = "<my app path>//element(*, nt:resource) [jcr:contains(@jcr:encoding,'*utf*')]";
但这不起作用。
String xpath3 = "<my app path>//element(*, nt:resource) [jcr:contains(@jcr:data,'*plain*')]";
真正的事实是我们使用了一些自定义节点，让我们解释一下属性定义：
在 Java 术语中...
public class Resource extends BaseNode {
/** Encoding media type. It cannot be null or empty. */
@Field(jcrName = "jcr:encoding", jcrDefaultValue = "")
private String encoding;
/** Resource's MIME type. It cannot be null or empty. */
@Field(jcrName="jcr:mimeType", jcrDefaultValue = "")
private String mimeType;
/** Resource's size (bytes). */
@Field(jcrName="skl:size")
private long size;
/** Resource's content data as stream. It cannot be null. */
@Field(jcrName="jcr:data")
private InputStream data;
...
}
@Node(jcrType = "baseNode", isAbstract = true)
public abstract class BaseNode {
@Field(jcrName = "name", id = true)
protected String name;
@Field(jcrName = "creationDate")
protected Date creationDate;
...
}
在 JackRabbit 术语中......
<!-- Base node type definition -->
<nodeType name="docs:baseNode"
isMixin="false"
hasOrderableChildNodes="false" >
<supertypes>
<supertype>nt:hierarchyNode</supertype>
</supertypes>
<propertyDefinition name="docs:name"
requiredType="String"
autoCreated="false"
mandatory="true"
onParentVersion="COPY"
protected="false"
multiple="false" />
<propertyDefinition name="docs:searchPath"
requiredType="String"
autoCreated="false"
mandatory="false"
onParentVersion="COPY"
protected="false"
multiple="false" />
<propertyDefinition name="docs:creationDate"
requiredType="Date"
autoCreated="false"
mandatory="true"
onParentVersion="COPY"
protected="false"
multiple="false" />
<propertyDefinition name="docs:lastModified"
requiredType="Date"
autoCreated="false"
mandatory="true"
onParentVersion="COPY"
protected="false"
multiple="false" />
<childNodeDefinition name="*"
defaultPrimaryType="docs:baseNode"
autoCreated="false"
mandatory="false"
onParentVersion="COPY"
protected="false"
sameNameSiblings="false">
<requiredPrimaryTypes>
<requiredPrimaryType>docs:baseNode</requiredPrimaryType>
</requiredPrimaryTypes>
</childNodeDefinition>
</nodeType>
<!-- Resource node type definition -->
<nodeType name="skl:resource"
isMixin="false"
hasOrderableChildNodes="false" >
<supertypes>
<supertype>docs:baseNode</supertype>
<supertype>nt:resource</supertype>
</supertypes>
<propertyDefinition name="skl:size"
requiredType="Long"
autoCreated="false"
mandatory="true"
onParentVersion="COPY"
protected="false"
multiple="false" />
<propertyDefinition name="skl:externalUri"
requiredType="String"
autoCreated="false"
mandatory="false"
onParentVersion="COPY"
protected="false"
multiple="false" />
</nodeType>
关键是，我如何执行此查询以按 jcr:data 属性进行过滤。