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/*
* EjbRelationshipRoleNode.java
*
* Created on February 1, 2002, 3:22 PM
*/
package com.sun.enterprise.deployment.node.ejb;
import java.util.Map;
import java.util.HashMap;
import org.w3c.dom.Node;
import com.sun.enterprise.deployment.node.XMLElement;
import com.sun.enterprise.deployment.node.XMLNode;
import com.sun.enterprise.deployment.node.DeploymentDescriptorNode;
import com.sun.enterprise.deployment.node.LocalizedInfoNode;
import com.sun.enterprise.deployment.node.ConfigurableNode;
import com.sun.enterprise.deployment.node.DescriptorFactory;
import com.sun.enterprise.deployment.Descriptor;
import com.sun.enterprise.deployment.RelationRoleDescriptor;
import com.sun.enterprise.deployment.EjbBundleDescriptor;
import com.sun.enterprise.deployment.EjbCMPEntityDescriptor;
import com.sun.enterprise.deployment.RelationshipDescriptor;
import com.sun.enterprise.deployment.xml.EjbTagNames;
/**
* This class is responsible for handling the ejb-relationship-role xml elements
*
* @author Jerome Dochez
* @version
*/
public class EjbRelationshipRoleNode extends DeploymentDescriptorNode {
RelationRoleDescriptor descriptor;
public EjbRelationshipRoleNode() {
super();
registerElementHandler(new XMLElement(EjbTagNames.DESCRIPTION), LocalizedInfoNode.class);
}
/**
* @return the handler registered for the subtag element of the curent XMLNode
*/
public XMLNode getHandlerFor(XMLElement element) {
if (EjbTagNames.RELATIONSHIP_ROLE_SOURCE.equals(element.getQName())) {
Map dispatchTable = new HashMap();
dispatchTable.put(EjbTagNames.DESCRIPTION, "setRoleSourceDescription");
ConfigurableNode newNode = new ConfigurableNode(getDescriptor(), dispatchTable, element);
return newNode;
} if (EjbTagNames.CMR_FIELD.equals(element.getQName())) {
Map dispatchTable = new HashMap();
dispatchTable.put(EjbTagNames.DESCRIPTION, "setCMRFieldDescription");
ConfigurableNode newNode = new ConfigurableNode(getDescriptor(), dispatchTable, element);
return newNode;
} else {
return super.getHandlerFor(element);
}
}
/**
* @return true if the element tag can be handled by any registered sub nodes of the
* current XMLNode
*/
public boolean handlesElement(XMLElement element) {
if (EjbTagNames.RELATIONSHIP_ROLE_SOURCE.equals(element.getQName())) {
return true;
}
if (EjbTagNames.CMR_FIELD.equals(element.getQName())) {
return true;
}
return super.handlesElement(element);
}
/**
* @return the descriptor instance to associate with this XMLNode
*/
public Object getDescriptor() {
if (descriptor==null) {
descriptor = (RelationRoleDescriptor) DescriptorFactory.getDescriptor(getXMLPath());
}
return descriptor;
}
/**
* all sub-implementation of this class can use a dispatch table to map xml element to
* method name on the descriptor class for setting the element value.
*
* @return the map with the element name as a key, the setter method as a value
*/
protected Map getDispatchTable() {
// no need to be synchronized for now
Map table = super.getDispatchTable();
table.put(EjbTagNames.EJB_RELATIONSHIP_ROLE_NAME, "setName");
table.put(EjbTagNames.CMR_FIELD_NAME, "setCMRField");
table.put(EjbTagNames.CMR_FIELD_TYPE, "setCMRFieldType");
return table;
}
/**
* receives notification of the end of an XML element by the Parser
*
* @param element the xml tag identification
* @return true if this node is done processing the XML sub tree
*/
public boolean endElement(XMLElement element) {
if (EjbTagNames.CASCADE_DELETE.equals(element.getQName())) {
descriptor.setCascadeDelete(true);
}
return super.endElement(element);
}
/**
* receives notiification of the value for a particular tag
*
* @param element the xml element
* @param value it's associated value
*/
public void setElementValue(XMLElement element, String value) {
if (EjbTagNames.MULTIPLICITY.equals(element.getQName())) {
if ( value.equals("Many") )
descriptor.setIsMany(true);
else if ( value.equals("One") )
descriptor.setIsMany(false);
else if ( value.equals("many") ) // for backward compat with 1.3 FCS
descriptor.setIsMany(true);
else if ( value.equals("one") ) // for backward compat with 1.3 FCS
descriptor.setIsMany(false);
else
throw new IllegalArgumentException("Error in value of multiplicity element in EJB deployment descriptor XML: the value must be One or Many");
} else if (EjbTagNames.EJB_NAME.equals(element.getQName())) {
// let's get our bunlde descriptor...
EjbBundleDescriptor bundleDesc = getEjbBundleDescriptor();
EjbCMPEntityDescriptor desc = (EjbCMPEntityDescriptor)bundleDesc.getEjbByName(value);
if (desc!=null){
descriptor.setPersistenceDescriptor(desc.getPersistenceDescriptor());
} else {
throw new IllegalArgumentException("Cannot find ejb " + value + " in bundle for relationship " + descriptor.getName());
}
} else super.setElementValue(element, value);
}
private EjbBundleDescriptor getEjbBundleDescriptor() {
XMLNode parent = getParentNode();
Object parentDesc = parent.getDescriptor();
while (parent!=null && !(parentDesc instanceof EjbBundleDescriptor)) {
parent = parent.getParentNode();
if (parent !=null)
parentDesc = parent.getDescriptor();
}
if (parent!=null) {
return (EjbBundleDescriptor) parentDesc;
} else {
throw new IllegalArgumentException("Cannot find bundle descriptor");
}
}
/**
* write the descriptor class to a DOM tree and return it
*
* @param parent node in the DOM tree
* @param node name for the root element of this xml fragment
* @param the descriptor to write
* @return the DOM tree top node
*/
public Node writeDescriptor(Node parent, String nodeName, RelationRoleDescriptor descriptor) {
Node roleNode = super.writeDescriptor(parent, nodeName, descriptor);
LocalizedInfoNode localizedNode = new LocalizedInfoNode();
localizedNode.writeLocalizedMap(roleNode, EjbTagNames.DESCRIPTION, descriptor.getLocalizedDescriptions());
if (descriptor.getRelationRoleName() != null) {
appendTextChild(roleNode, EjbTagNames.EJB_RELATIONSHIP_ROLE_NAME,
descriptor.getRelationRoleName());
}
// multiplicity
if (descriptor.getIsMany()) {
appendTextChild(roleNode, EjbTagNames.MULTIPLICITY, "Many");
} else {
appendTextChild(roleNode, EjbTagNames.MULTIPLICITY, "One");
}
// cascade-delete
if (descriptor.getCascadeDelete()) {
appendChild(roleNode, EjbTagNames.CASCADE_DELETE);
}
Node roleSourceNode = appendChild(roleNode, EjbTagNames.RELATIONSHIP_ROLE_SOURCE);
appendTextChild(roleSourceNode, EjbTagNames.DESCRIPTION, descriptor.getRoleSourceDescription());
appendTextChild(roleSourceNode, EjbTagNames.EJB_NAME, descriptor.getOwner().getName());
// cmr-field
if (descriptor.getCMRField() != null ) {
Node cmrFieldNode = appendChild(roleNode, EjbTagNames.CMR_FIELD);
// description
appendTextChild(cmrFieldNode, EjbTagNames.DESCRIPTION,
descriptor.getCMRFieldDescription());
// cmr-field-name
appendTextChild(cmrFieldNode, EjbTagNames.CMR_FIELD_NAME,
descriptor.getCMRField());
// cmr-field-type
appendTextChild(cmrFieldNode, EjbTagNames.CMR_FIELD_TYPE,
descriptor.getCMRFieldType());
}
return roleNode;
}
}
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