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/**
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* '$RCSfile$'
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* Copyright: 2000 Regents of the University of California and the
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* National Center for Ecological Analysis and Synthesis
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*
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* '$Author: Serhan AKIN $'
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* '$Date: 2009-07-15 10:54:27 +0300 $'
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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package edu.ucsb.nceas.metacat.client.rest;
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import java.io.IOException;
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import java.io.Reader;
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import java.util.Vector;
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import edu.ucsb.nceas.metacat.client.DocumentNotFoundException;
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import edu.ucsb.nceas.metacat.client.InsufficientKarmaException;
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import edu.ucsb.nceas.metacat.client.MetacatAuthException;
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import edu.ucsb.nceas.metacat.client.MetacatException;
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import edu.ucsb.nceas.metacat.client.MetacatInaccessibleException;
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/**
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* This interface provides methods for initializing and logging in to a
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* Metacat REST API, and then querying, reading, transforming, inserting,
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* updating and deleting documents from that server.
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*/
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public interface MetacatRest
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{
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/** HTTP Verb GET*/
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public static final String GET = "GET";
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/** HTTP Verb POST*/
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public static final String POST = "POST";
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/** HTTP Verb PUT*/
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public static final String PUT = "PUT";
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/** HTTP Verb DELETE*/
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public static final String DELETE = "DELETE";
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/*
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* API Resources
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*/
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/** API OBJECTS Resource which handles with document operations*/
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public static final String RESOURCE_OBJECTS = "object";
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/** API SESSION Resource which handles with user session operations*/
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public static final String RESOURCE_SESSION = "session";
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/** API IDENTIFIER Resource which controls object unique identifier operations*/
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public static final String RESOURCE_IDENTIFIER = "identifier";
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/*
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* API Functions used as URL parameters
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*/
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/** Function keyword*/
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public static final String FUNCTION_KEYWORD = "op";
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/** Function name for login function*/
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public static final String FUNCTION_NAME_LOGIN = "login";
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/** Function name for logout function*/
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public static final String FUNCTION_NAME_LOGOUT = "logout";
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/** Function name for isregistered function*/
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public static final String FUNCTION_NAME_ISREGISTERED = "isregistered";
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/** Function name for getalldocids function*/
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public static final String FUNCTION_NAME_GETALLDOCS = "getalldocids";
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/** Function name for getnextrevision function*/
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public static final String FUNCTION_NAME_GETNEXTREV = "getnextrevision";
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/** Function name for getnextobject function*/
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public static final String FUNCTION_NAME_GETNEXTOBJ = "getnextobject";
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/** Function name for insert function*/
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public static final String FUNCTION_NAME_INSERT = "insert";
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/** Function name for update function*/
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public static final String FUNCTION_NAME_UPDATE= "update";
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/**
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* Method used to log in to a metacat server through REST API
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*
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* @param username the username of the user, like an LDAP DN
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* @param password the password for that user for authentication
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* @return the response string from metacat in XML format
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* @throws MetacatAuthException when the username/password could
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* not be authenticated
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*/
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public String login(String username, String password)
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throws MetacatAuthException, MetacatInaccessibleException;
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/**
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* Method used to log out a metacat server. The Metacat server will end
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* the session when this call is invoked.
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*
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* @return the response string from metacat in XML format
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* @throws MetacatInaccessibleException when the metacat server can not be
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* reached or does not respond
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*/
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public String logout() throws MetacatInaccessibleException,
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MetacatException;
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/**
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* Read a public XML document , accessed by docid, and returned as a Reader.
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*
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* @param docid the identifier of the document to be read
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* @param outputFile name of the file to be written to local (optional)
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* @return a Reader for accessing the document
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* @throws InsufficientKarmaException when the user has insufficent rights
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* for the operation
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* @throws MetacatInaccessibleException when the metacat server can not be
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* reached or does not respond
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* @throws MetacatException when the metacat server generates another error
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*/
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public Reader getObject(String docid, String outputFile) throws InsufficientKarmaException,
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MetacatInaccessibleException, DocumentNotFoundException, MetacatException;
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/**
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* Read XML document from server session, accessed by docid, and returned as a Reader.
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*
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* @param docid the identifier of the document to be read
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* @param outputFile name of the file to be written to local (optional)
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* @return a Reader for accessing the document
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* @throws InsufficientKarmaException when the user has insufficent rights
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* for the operation
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* @throws MetacatInaccessibleException when the metacat server can not be
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* reached or does not respond
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* @throws MetacatException when the metacat server generates another error
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*/
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public Reader authenticatedGetObject(String docid, String outputFile) throws InsufficientKarmaException,
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MetacatInaccessibleException, DocumentNotFoundException, MetacatException;
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/**
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* Query the metacat document store with the given metacat-compatible
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* query document, and return the result set as a Reader.
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*
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* @param xmlQuery a Reader for accessing the XML version of the query
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* @return a Reader for accessing the result set
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*/
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public Reader query(Reader xmlQuery) throws MetacatInaccessibleException,IOException;
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public Reader authenticatedQuery(Reader xmlQuery) throws MetacatInaccessibleException,IOException;
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/**
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* Insert / Update an XML document into the repository, making it available for
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* searching using the query() methods.
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*
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* @param docid the docid to insert the document
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* @param xmlDocument a Reader for accessing the XML document to be inserted
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* @param isInsert whether the operation is update or insert
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*
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* @return the metacat response message
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* @throws InsufficientKarmaException when the user has insufficent rights
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* for the operation
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* @throws MetacatInaccessibleException when the metacat server can not be
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* reached or does not respond
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* @throws MetacatException when the metacat server generates another error
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* @throws IOException when there is an error reading the xml document
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*/
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public String putObject(String docid, Reader xmlDocument,boolean isInsert)
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throws InsufficientKarmaException, MetacatException, IOException,
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MetacatInaccessibleException;
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/**
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* Delete an XML document in the repository.
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*
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* @param docid the docid to delete
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* @return the metacat response message
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* @throws InsufficientKarmaException when the user has insufficent rights
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* for the operation
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* @throws MetacatInaccessibleException when the metacat server can not be
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* reached or does not respond
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* @throws MetacatException when the metacat server generates another error
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*/
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public String deleteObject(String docid)
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throws InsufficientKarmaException, MetacatException,
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MetacatInaccessibleException;
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/**
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* When the MetacatFactory creates an instance it needs to set the
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* MetacatUrl to which connections should be made.
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*
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* @param metacatUrl the URL for the metacat server
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*/
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public void setContextRootUrl(String contextRootUrl) ;
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/**
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* Get the session identifier for this session.
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*
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* @returns the sessionId as a String, or null if the session is invalid
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*/
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public String getSessionId();
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/**
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* Set the session identifier for this session. This identifier was
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* previously established with a call to login. To continue to use the
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* same session, set the session id before making a call to one of the
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* metacat access methods (e.g., read, query, insert, etc.).
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*
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* @param String the sessionId from a previously established session
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*/
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public void setSessionId(String sessionId);
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/**
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* Return the highest document id for a given scope. This is used by
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* clients to make it easier to determine the next free identifier in a
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* sequence for a given scope.
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* @param scope String the scope to use for looking up the latest id
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* @throws MetacatException when an error occurs
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*/
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public String getNextObject(String scope) throws MetacatException;
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/**
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* The method will return the latest revision in metacat server
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* for a given document id. If some error happens, this method will throw
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* an exception.
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* @param identifierId String the given docid you want to use. the docid it self
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* can have or haven't revision number
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* @throws MetacatException
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*/
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public int getNextRevision(String identifierId) throws MetacatException;
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/**
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* return a list of all docids that match a given scope. if scope is null
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* return all docids registered in the system
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* @param scope String the scope to use to limit the docid query
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* @throws MetacatException when an error occurs
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*/
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public Vector<String> getAllDocids(String scope) throws MetacatException;
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/**
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* return true of the given docid is registered, false if not
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* @param scope String the scope to use to limit the docid query
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* @throws MetacatException when an error occurs
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*/
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public boolean isRegistered(String identifierId) throws MetacatException;
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/**
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* Adds identifierId (Metacat Server does not support it!)
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* @param identifierId String the given docid you want to use.
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* @throws MetacatException when an error occurs
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*/
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public String addLSID(String identifierId) throws MetacatException;
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}
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