org.apache.metamodel.xml

Class XmlSaxTableDef

java.lang.Object

org.apache.metamodel.xml.XmlSaxTableDef

All Implemented Interfaces:

Serializable

public final class XmlSaxTableDef
extends Object
implements Serializable

Defines a table layout for XmlSaxDataContext. This class is used as an instruction set of xpath expressions for the datacontext to create Tables. These types of expressions are allowed in the XmlSaxTableDef:

• Element selectors: "/path/to/element"
• Attribute selectors: "/path/to/element@attribute"
• Element index selectors: "index(/path/to)" (can be used to make cross-references to parent tags)

If, for example, this is your XML document:

 <root>
        <organization type="company">
                <name>Company A</name>
                <employees>
                        <employee>
                                <name>John Doe</name>
                                <gender>M</gender>
                        </employee>
                        <employee>
                                <name>Jane Doe</name>
                                <gender>F</gender>
                        </employee>
                </employees>
        </organization>
        <organization type="government">
                <name>Company B</name>
                <employees>
                        <employee>
                                <name>Susan</name>
                                <gender>F</gender>
                        </employee>
                </employees>
        </organization>
 </root>
 

Then if you wanted to extract information about organizations, these xpaths could work:

• Organization row scope: "/root/organization"
• Organization name: "/root/organization/name"
• Organization type: "/root/organization@type"

Or if you wanted to extract information about employees:

• Employee row scope: "/root/organization/employees/employee"
• Employee name: "/root/organization/employees/employee/name"
• Employee gender: "/root/organization/employees/employee/gender"
• Employee organization index: "index(/root/organization)"

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
XmlSaxTableDef(String rowXpath, Collection<String> valueXpaths)
XmlSaxTableDef(String rowXpath, String[] valueXpaths) Constructs a XmlSaxTableDef based on an xpath expression for the row scope and an array of xpath expressions for the individual values (columns) within a row.

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object obj)
String	getRowXpath()
String[]	getValueXpaths()
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

XmlSaxTableDef

public XmlSaxTableDef(String rowXpath,
                      String[] valueXpaths)

Constructs a XmlSaxTableDef based on an xpath expression for the row scope and an array of xpath expressions for the individual values (columns) within a row.

Parameters:

rowXpath - an xpath expression for the scope of a record, eg. /companies/company/employee

valueXpaths - an array of xpath expressions for the individual values (columns) of a row. eg: [/companies/company/employee/name, /companies/company/employee/gender, index(/companies/company)]

XmlSaxTableDef

public XmlSaxTableDef(String rowXpath,
                      Collection<String> valueXpaths)

Method Detail

getRowXpath

public String getRowXpath()

getValueXpaths

public String[] getValueXpaths()

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object