IdentitySelector.java example

Explorer
castor-master
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package org.exolab.castor.xml.schema;

import org.exolab.castor.xml.ValidationException;

/**
 * A class which represents the selector for an IdentityConstraint
 *
 * @author <a href="mailto:kvisco@intalio.com">Keith Visco</a>
 * @version $Revision$ $Date: 2006-04-14 04:14:43 -0600 (Fri, 14 Apr 2006) $
**/
public class IdentitySelector extends Annotated {
    /** SerialVersionUID */
    private static final long serialVersionUID = -66732684639814508L;

    /**
     * Identity Selector id (optional)
    **/
    private String _id   = null;
    
    /**
     * XPath expression for selector nodes (required)
    **/
    private String _xpath = null;
    
    /**
     * Creates a new IdentitySelector.
     *
     * @param xpath the xpath for the IdentitySelector. Must not be null.
     * @exception SchemaException if xpath is null.
    **/
    public IdentitySelector(String xpath) 
        throws SchemaException
    {
        setXPath(xpath);
    } //-- IdentitySelector

    /**
     * Returns the Id of this IdentitySelector, or null if no
     * Id has been set.
     *
     * @return the Id of this IdentitySelector, or null if no
     * Id has been set.
    **/
    public String getId() {
        return _id;
    } //-- getId
    
    /**
     * Returns the XPath of this IdentitySelector. This value will
     * never be null.
     *
     * @return the XPath of this IdentitySelector.
    **/
    public String getXPath() {
        return _xpath;
    } //-- getXPath

    
    /**
     * Sets the Id for this IdentitySelector.
     *
     * @param id the Id for this IdentitySelector. 
    **/
    public void setId(String id) {
        _id = id;
    } //-- setId
    
    /**
     * Sets the XPath expression for this Selector.
     *
     * @param xpath the XPath expression for this IdentitySelector. Must not 
     * be null.
     * @exception SchemaException if xpath is null.
    **/
    public void setXPath(String xpath) 
        throws SchemaException
    {
        if (xpath == null) 
            throw new SchemaException("The xpath of a 'selector' must not be null.");
            
        _xpath = xpath;
    } //-- setXPath
       
    /**
     * Returns the type of this Schema Structure
     * @return the type of this Schema Structure
    **/
    public short getStructureType() {
        return Structure.IDENTITY_SELECTOR;
    } //-- getStructureType

    /**
     * Checks the validity of this Schema defintion.
     * @exception ValidationException when this Schema definition
     * is invalid.
    **/
    public void validate()
        throws ValidationException
    {
        //-- do nothing, if it can be constructed, it's valid.
        //-- validate XPath expression in the future?
    } //-- validate
    
} //-- class: IdentitySelector