import org.eclipse.gef.editpolicies.ConnectionEditPolicy; //导入依赖的package包/类
protected void createEditPolicies() {
	// Selection handle edit policy.
	// Makes the connection show a feedback, when selected by the user.
	installEditPolicy(EditPolicy.CONNECTION_ENDPOINTS_ROLE,
			new ConnectionEndpointEditPolicy());
	// Allows the removal of the connection model element
	installEditPolicy(EditPolicy.CONNECTION_ROLE,
			new ConnectionEditPolicy() {
				protected Command getDeleteCommand(GroupRequest request) {
					return new ConnectionDeleteCommand(getCastedModel());
				}
			});
}
 

import org.eclipse.gef.editpolicies.ConnectionEditPolicy; //导入依赖的package包/类
@Override
protected void createEditPolicies() {
	installEditPolicy(EditPolicy.CONNECTION_ENDPOINTS_ROLE, new ConnectionEndpointEditPolicy());
	installEditPolicy(EditPolicy.CONNECTION_ROLE, new ConnectionEditPolicy() {
		@Override
		protected Command getDeleteCommand(GroupRequest arg0) {
			return new DeleteLinkCommand(getModel());
		}
	});
}
 

import org.eclipse.gef.editpolicies.ConnectionEditPolicy; //导入依赖的package包/类
/**
 * @see nexcore.tool.uml.ui.core.diagram.edit.part.AbstractDiagramConnectionEditPart#createConnectionEditPolicy()
 */
@Override
protected ConnectionEditPolicy createConnectionEditPolicy() {
    return new MessageConnectionEditPolicy();
}
 

import org.eclipse.gef.editpolicies.ConnectionEditPolicy; //导入依赖的package包/类
/**
 * 컨넥션 에디트 폴리시(삭제정책)를 생성한다. EditPolicy.CONNECTION_ROLE 인스톨 된다.
 * 
 * @return
 */
protected ConnectionEditPolicy createConnectionEditPolicy() {
    return new DiagramConnectionEditPolicy();
}
 

import org.eclipse.gef.editpolicies.ConnectionEditPolicy; //导入依赖的package包/类
/**
 * 컨넥션 에디트 폴리시(삭제정책)를 생성한다. EditPolicy.CONNECTION_ROLE 인스톨 된다.
 * 
 * @return
 */
protected ConnectionEditPolicy createConnectionEditPolicy() {
    return new ActivityDiagramConnectionEditPolicy();
}