package org.yaz4j;
+import org.yaz4j.exception.ZoomException;
import org.yaz4j.jni.SWIGTYPE_p_ZOOM_connection_p;
import org.yaz4j.jni.SWIGTYPE_p_ZOOM_query_p;
import org.yaz4j.jni.SWIGTYPE_p_ZOOM_resultset_p;
import org.yaz4j.jni.SWIGTYPE_p_ZOOM_scanset_p;
-import org.yaz4j.jni.SWIGTYPE_p_p_char;
import org.yaz4j.jni.yaz4jlib;
-import org.yaz4j.jni.yaz4jlibConstants;
public class Connection {
-
private String host;
private int port;
- private ConnectionOptionsCollection options = null;
- protected SWIGTYPE_p_ZOOM_connection_p zoomConnection = null;
- private boolean connected = false;
+ protected SWIGTYPE_p_ZOOM_connection_p zoomConnection;
+ //connection is initially closed
+ protected boolean closed = true;
private boolean disposed = false;
+ public enum QueryType {
+ CQLQuery, PrefixQuery
+ };
+
static {
// on Linux 'yaz4j' maps to 'libyaz4j.so' (i.e. 'lib' prefix & '.so' extension)
// on Windows 'yaz4j' maps to 'yaz4j.dll' (i.e. '.dll' extension)
String libName = "yaz4j";
- try {
- // System.err.println( "Loading library '"+ System.mapLibraryName( libName ) + "'" );
- System.loadLibrary(libName);
- } catch (Throwable e) {
- System.err.println("Fatal Error: Failed to load library '" + System.mapLibraryName(libName) + "'");
- e.printStackTrace();
- }
+ System.loadLibrary(libName);
}
public Connection(String host, int port) {
this.host = host;
this.port = port;
-
- options = new ConnectionOptionsCollection();
- zoomConnection = yaz4jlib.ZOOM_connection_create(options.zoomOptions);
-
- SWIGTYPE_p_p_char cp = null;
- SWIGTYPE_p_p_char addinfo = null;
- int errorCode = yaz4jlib.ZOOM_connection_error(zoomConnection, cp, addinfo);
- CheckErrorCodeAndThrow(errorCode);
+ zoomConnection = yaz4jlib.ZOOM_connection_create(null);
}
public void finalize() {
- Dispose();
- }
-
- private void CheckErrorCodeAndThrow(int errorCode) {
- String message;
-
- if (errorCode == yaz4jlibConstants.ZOOM_ERROR_NONE) {
- return;
- } else if (errorCode == yaz4jlib.ZOOM_ERROR_CONNECT) {
- message = String.format("Connection could not be made to %s:%d", host, port);
- throw new ConnectionUnavailableException(message);
- } else if (errorCode == yaz4jlib.ZOOM_ERROR_INVALID_QUERY) {
- message = String.format("The query requested is not valid or not supported");
- throw new InvalidQueryException(message);
- } else if (errorCode == yaz4jlib.ZOOM_ERROR_INIT) {
- message = String.format("Server %s:%d rejected our init request", host, port);
- throw new InitRejectedException(message);
- } else if (errorCode == yaz4jlib.ZOOM_ERROR_TIMEOUT) {
- message = String.format("Server %s:%d timed out handling our request", host, port);
- throw new ConnectionTimeoutException(message);
- } else if ((errorCode == yaz4jlib.ZOOM_ERROR_MEMORY) || (errorCode == yaz4jlib.ZOOM_ERROR_ENCODE) || (errorCode == yaz4jlib.ZOOM_ERROR_DECODE) || (errorCode == yaz4jlib.ZOOM_ERROR_CONNECTION_LOST) || (errorCode == yaz4jlib.ZOOM_ERROR_INTERNAL) || (errorCode == yaz4jlib.ZOOM_ERROR_UNSUPPORTED_PROTOCOL) || (errorCode == yaz4jlib.ZOOM_ERROR_UNSUPPORTED_QUERY)) {
- message = yaz4jlib.ZOOM_connection_errmsg(zoomConnection);
- throw new ZoomImplementationException("A fatal error occurred in Yaz: " + errorCode + " - " + message);
- } else {
- String errMsgBib1 = "Bib1Exception: Error Code = " + errorCode + " (" + Bib1Diagnostic.GetError(errorCode) + ")";
- throw new Bib1Exception(errMsgBib1);
- }
- }
-
- private enum QueryType {
-
- CQLQuery, PrefixQuery
- };
-
- public ResultSet Search(PrefixQuery query) {
- return Search(query.getQueryString(), QueryType.PrefixQuery);
- }
-
- public ResultSet Search(CQLQuery query) {
- return Search(query.getQueryString(), QueryType.CQLQuery);
- }
-
- private ResultSet Search(String query, QueryType queryType) {
- EnsureConnected();
-
- SWIGTYPE_p_ZOOM_query_p yazQuery = yaz4jlib.ZOOM_query_create();
- ResultSet resultSet = null;
-
- try {
- if (queryType == QueryType.CQLQuery) {
- yaz4jlib.ZOOM_query_cql(yazQuery, query);
- } else if (queryType == QueryType.PrefixQuery) {
- yaz4jlib.ZOOM_query_prefix(yazQuery, query);
- } else {
- throw new InvalidQueryException("queryType");
- }
-
- SWIGTYPE_p_ZOOM_resultset_p yazResultSet = yaz4jlib.ZOOM_connection_search(zoomConnection, yazQuery);
-
- int errorCode = yaz4jlib.ZOOM_connection_errcode(zoomConnection);
- if (errorCode != yaz4jlib.ZOOM_ERROR_NONE) {
- yaz4jlib.ZOOM_resultset_destroy(yazResultSet);
- }
- CheckErrorCodeAndThrow(errorCode);
-
- resultSet = new ResultSet(yazResultSet, zoomConnection);
- } finally {
- yaz4jlib.ZOOM_query_destroy(yazQuery); // deallocate yazQuery also when exceptions
- yazQuery = null;
- }
- return resultSet;
- }
-
- public ScanSet Scan(String query) {
- EnsureConnected();
+ _dispose();
+ }
+
+ public ResultSet search(String query, QueryType queryType) throws ZoomException {
+ if (closed) throw new IllegalStateException("Connection is closed.");
+ SWIGTYPE_p_ZOOM_query_p yazQuery = null;
+ if (queryType == QueryType.CQLQuery) {
+ yazQuery = yaz4jlib.ZOOM_query_create();
+ yaz4jlib.ZOOM_query_cql(yazQuery, query);
+ } else if (queryType == QueryType.PrefixQuery) {
+ yazQuery = yaz4jlib.ZOOM_query_create();
+ yaz4jlib.ZOOM_query_prefix(yazQuery, query);
+ }
+ SWIGTYPE_p_ZOOM_resultset_p yazResultSet = yaz4jlib.ZOOM_connection_search(zoomConnection, yazQuery);
+ ZoomException err = ExceptionUtil.getError(zoomConnection, host,
+ port);
+ if (err != null) {
+ yaz4jlib.ZOOM_resultset_destroy(yazResultSet);
+ yaz4jlib.ZOOM_query_destroy(yazQuery);
+ throw err;
+ }
+ return new ResultSet(yazResultSet, this);
+ }
+
+ public ScanSet scan(String query) throws ZoomException {
+ if (closed) throw new IllegalStateException("Connection is closed.");
SWIGTYPE_p_ZOOM_scanset_p yazScanSet = yaz4jlib.ZOOM_connection_scan(zoomConnection, query);
-
- int errorCode = yaz4jlib.ZOOM_connection_errcode(zoomConnection);
- if (errorCode != yaz4jlib.ZOOM_ERROR_NONE) {
+ ZoomException err = ExceptionUtil.getError(zoomConnection, host, port);
+ if (err != null) {
yaz4jlib.ZOOM_scanset_destroy(yazScanSet);
+ throw err;
}
- CheckErrorCodeAndThrow(errorCode);
-
ScanSet scanSet = new ScanSet(yazScanSet, this);
return scanSet;
}
- public ConnectionOptionsCollection getOptions() {
- return options;
+ /**
+ * Initiates the connection
+ */
+ public void connect() throws ZoomException {
+ yaz4jlib.ZOOM_connection_connect(zoomConnection, host, port);
+ ZoomException err = ExceptionUtil.getError(zoomConnection, host, port);
+ if (err != null) throw err;
+ closed = false;
}
- protected void EnsureConnected() {
- if (!connected) {
- Connect();
- }
+ /**
+ * Closes the connection.
+ */
+ public void close() {
+ yaz4jlib.ZOOM_connection_close(zoomConnection);
+ closed = true;
}
- public void Connect() {
- yaz4jlib.ZOOM_connection_connect(zoomConnection, host, port);
- int errorCode = yaz4jlib.ZOOM_connection_errcode(zoomConnection);
- CheckErrorCodeAndThrow(errorCode);
- connected = true;
+ /**
+ * Write option with a given name.
+ * @param name option name
+ * @param value option value
+ * @return connection (self) for chainability
+ */
+ public Connection option(String name, String value) {
+ yaz4jlib.ZOOM_connection_option_set(zoomConnection, name, value);
+ return this;
}
- public void Dispose() {
- if (!disposed) {
- yaz4jlib.ZOOM_connection_destroy(zoomConnection);
- zoomConnection = null;
- disposed = true;
- }
+ /**
+ * Read option with a given name
+ * @param name option name
+ * @return option value
+ */
+ public String option(String name) {
+ return yaz4jlib.ZOOM_connection_option_get(zoomConnection, name);
}
public String getSyntax() {
- return options.get("preferredRecordSyntax");
+ return option("preferredRecordSyntax");
}
public void setSyntax(String value) {
- options.set("preferredRecordSyntax", value);
+ option("preferredRecordSyntax", value);
}
public String getDatabaseName() {
- return options.get("databaseName");
+ return option("databaseName");
}
public void setDatabaseName(String value) {
- options.set("databaseName", value);
+ option("databaseName", value);
}
public String getUsername() {
- return options.get("user");
+ return option("user");
}
public void setUsername(String value) {
- options.set("user", value);
+ option("user", value);
}
public String getPassword() {
- return options.get("password");
+ return option("password");
}
public void setPassword(String value) {
- options.set("password", value);
+ option("password", value);
+ }
+
+ /**
+ * INTERNAL, GC-ONLY
+ */
+ void _dispose() {
+ if (!disposed) {
+ yaz4jlib.ZOOM_connection_destroy(zoomConnection);
+ zoomConnection = null;
+ disposed = true;
+ }
}
}
projects / yaz4j-moved-to-github.git / blobdiff