package tap.config; /* * This file is part of TAPLibrary. * * TAPLibrary is free software: you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * TAPLibrary is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public License * along with TAPLibrary. If not, see . * * Copyright 2015-2019 - UDS/Centre de Données astronomiques de Strasbourg (CDS), * Astronomisches Rechen Institut (ARI) */ import java.lang.reflect.Constructor; import java.lang.reflect.InvocationTargetException; import java.util.HashMap; import java.util.Properties; import tap.ServiceConnection.LimitUnit; import tap.TAPException; import tap.TAPFactory; import tap.backup.DefaultTAPBackupManager; /** * Utility class gathering tool functions and properties' names useful to * deal with a TAP configuration file. * *

* This class implements the Design Pattern "Utility": no instance of this * class can be created, it can not be extended, and it must be used only * thanks to its static classes and attributes. *

* * @author Grégory Mantelet (CDS;ARI) * @version 2.3 (03/2019) * @since 2.0 */ public final class TAPConfiguration { /** Name of the initial parameter to set in the WEB-INF/web.xml file * in order to specify the location and the name of the TAP configuration file to load. */ public final static String TAP_CONF_PARAMETER = "tapconf"; /** Default TAP configuration file. This file is research automatically * if none is specified in the WEB-INF/web.xml initial parameter {@value #TAP_CONF_PARAMETER}. */ public final static String DEFAULT_TAP_CONF_FILE = "tap.properties"; /* FILE MANAGER KEYS */ /** Name/Key of the property setting the file manager to use in the TAP service. */ public final static String KEY_FILE_MANAGER = "file_manager"; /** Value of the property {@link #KEY_FILE_MANAGER} specifying a local file manager. */ public final static String VALUE_LOCAL = "local"; /** Default value of the property {@link #KEY_FILE_MANAGER}: {@value #DEFAULT_FILE_MANAGER}. */ public final static String DEFAULT_FILE_MANAGER = VALUE_LOCAL; /** Name/Key of the property setting the local root directory where all TAP files must be stored. * This property is used only if {@link #KEY_FILE_MANAGER} is set to {@link #VALUE_LOCAL}. */ public final static String KEY_FILE_ROOT_PATH = "file_root_path"; /** Name/Key of the property indicating whether the jobs must be saved by user or not. * If yes, there will be one directory per user. Otherwise, all jobs are backuped in the same directory * (generally {@link #KEY_FILE_ROOT_PATH}). */ public final static String KEY_DIRECTORY_PER_USER = "directory_per_user"; /** Default value of the property {@link #KEY_DIRECTORY_PER_USER}: {@value #DEFAULT_DIRECTORY_PER_USER}. */ public final static boolean DEFAULT_DIRECTORY_PER_USER = false; /** Name/Key of the property indicating whether the user directories (in which jobs of the user are backuped) * must be gathered in less directories. If yes, the groups are generally made using the alphabetic order. * The idea is to reduce the number of apparent directories and to easier the research of a user directory. */ public final static String KEY_GROUP_USER_DIRECTORIES = "group_user_directories"; /** Default value of the property {@link #KEY_GROUP_USER_DIRECTORIES}: {@value #DEFAULT_GROUP_USER_DIRECTORIES}. */ public final static boolean DEFAULT_GROUP_USER_DIRECTORIES = false; /** Name/Key of the property specifying the default period (in seconds) while a job must remain on the server. * This value is set automatically to any job whose the retention period has never been specified by the user. */ public final static String KEY_DEFAULT_RETENTION_PERIOD = "default_retention_period"; /** Name/Key of the property specifying the maximum period (in seconds) while a job can remain on the server. */ public final static String KEY_MAX_RETENTION_PERIOD = "max_retention_period"; /** Default value of the properties {@link #KEY_DEFAULT_RETENTION_PERIOD} and {@link #KEY_MAX_RETENTION_PERIOD}: * {@value #DEFAULT_RETENTION_PERIOD}. */ public final static int DEFAULT_RETENTION_PERIOD = 0; /* LOG KEYS */ /** Name/Key of the property specifying the logger to use. * By default, {@link tap.log.DefaultTAPLog} is used. */ public final static String KEY_LOGGER = "logger"; /** Default value of the property {@link #KEY_LOGGER}: * {@value #DEFAULT_LOGGER}. */ public final static String DEFAULT_LOGGER = "default"; /** Name/Key of the property specifying the minimum type of messages * (i.e. DEBUG, INFO, WARNING, ERROR, FATAL) that must be logged by the * default logger. *

By default all messages are logged...which is equivalent to set this * property to "DEBUG".

*

Note: If {@link #KEY_LOGGER} is set to a value different * from {@value #DEFAULT_LOGGER}, this property is ignored.

*/ public final static String KEY_MIN_LOG_LEVEL = "min_log_level"; /** Name/Key of the property specifying the frequency of the log file * rotation to set in the default logger. *

By default the log rotation occurs every day at midnight.

*

Note: If {@link #KEY_LOGGER} is set to a value different * from {@value #DEFAULT_LOGGER}, this property is ignored.

*/ public final static String KEY_LOG_ROTATION = "log_rotation"; /** SLF4J logger value: {@value #SLF4J_LOGGER}. * @since 2.3 */ public final static String SLF4J_LOGGER = "slf4j"; /* UWS BACKUP */ /** Name/Key of the property specifying the frequency (in milliseconds) of jobs backup. * This property accepts three types of value: "never" (default), "user_action" (the backup of a job is done when * it is modified), or a numeric positive value (expressed in milliseconds). */ public final static String KEY_BACKUP_FREQUENCY = "backup_frequency"; /** Value of the property {@link #KEY_BACKUP_FREQUENCY} indicating that jobs should never be backuped. */ public final static String VALUE_NEVER = "never"; /** Value of the property {@link #KEY_BACKUP_FREQUENCY} indicating that job backup should occur only when the user * creates or modifies one of his jobs. This value can be used ONLY IF {@link #KEY_BACKUP_BY_USER} is "true". */ public final static String VALUE_USER_ACTION = "user_action"; /** Default value of the property {@link #KEY_BACKUP_FREQUENCY}: {@link #DEFAULT_BACKUP_FREQUENCY}. */ public final static long DEFAULT_BACKUP_FREQUENCY = DefaultTAPBackupManager.MANUAL; // = "never" => no UWS backup manager /** Name/Key of the property indicating whether there should be one backup file per user or one file for all. */ public final static String KEY_BACKUP_BY_USER = "backup_by_user"; /** Default value of the property {@link #KEY_BACKUP_BY_USER}: {@value #DEFAULT_BACKUP_BY_USER}. * This property can be enabled only if a user identification method is provided. */ public final static boolean DEFAULT_BACKUP_BY_USER = false; /* ASYNCHRONOUS JOBS */ /** Name/Key of the property specifying the maximum number of asynchronous jobs that can run simultaneously. * A negative or null value means "no limit". */ public final static String KEY_MAX_ASYNC_JOBS = "max_async_jobs"; /** Default value of the property {@link #KEY_MAX_ASYNC_JOBS}: {@value #DEFAULT_MAX_ASYNC_JOBS}. */ public final static int DEFAULT_MAX_ASYNC_JOBS = 0; /* EXECUTION DURATION */ /** Name/Key of the property specifying the default execution duration (in milliseconds) set automatically to a job * if none has been specified by the user. */ public final static String KEY_DEFAULT_EXECUTION_DURATION = "default_execution_duration"; /** Name/Key of the property specifying the maximum execution duration (in milliseconds) that can be set on a job. */ public final static String KEY_MAX_EXECUTION_DURATION = "max_execution_duration"; /** Default value of the property {@link #KEY_DEFAULT_EXECUTION_DURATION} and {@link #KEY_MAX_EXECUTION_DURATION}: {@value #DEFAULT_EXECUTION_DURATION}. */ public final static int DEFAULT_EXECUTION_DURATION = 0; /* DATABASE KEYS */ /** Name/Key of the property specifying the database access method to use. */ public final static String KEY_DATABASE_ACCESS = "database_access"; /** Value of the property {@link #KEY_DATABASE_ACCESS} to select the simple JDBC method. */ public final static String VALUE_JDBC = "jdbc"; /** Value of the property {@link #KEY_DATABASE_ACCESS} to access the database using a DataSource stored in JNDI. */ public final static String VALUE_JNDI = "jndi"; /** Name/Key of the property specifying the ADQL to SQL translator to use. */ public final static String KEY_SQL_TRANSLATOR = "sql_translator"; /** Value of the property {@link #KEY_SQL_TRANSLATOR} to select a PostgreSQL translator (no support for geometrical functions). */ public final static String VALUE_POSTGRESQL = "postgres"; /** Value of the property {@link #KEY_SQL_TRANSLATOR} to select a PgSphere translator. */ public final static String VALUE_PGSPHERE = "pgsphere"; /** Value of the property {@link #KEY_SQL_TRANSLATOR} to select an SQLServer translator. * @since 2.1 */ public final static String VALUE_SQLSERVER = "sqlserver"; /** Value of the property {@link #KEY_SQL_TRANSLATOR} to select a MySQL translator. * @since 2.1 */ public final static String VALUE_MYSQL = "mysql"; /** Name/Key of the property specifying by how many rows the library should fetch a query result from the database. * This is the fetch size for to apply for synchronous queries. */ public final static String KEY_SYNC_FETCH_SIZE = "sync_fetch_size"; /** Default value of the property {@link #KEY_SYNC_FETCH_SIZE}: {@value #DEFAULT_SYNC_FETCH_SIZE}. */ public final static int DEFAULT_SYNC_FETCH_SIZE = 1000; /** Name/Key of the property specifying by how many rows the library should fetch a query result from the database. * This is the fetch size for to apply for asynchronous queries. */ public final static String KEY_ASYNC_FETCH_SIZE = "async_fetch_size"; /** Default value of the property {@link #KEY_ASYNC_FETCH_SIZE}: {@value #DEFAULT_ASYNC_FETCH_SIZE}. */ public final static int DEFAULT_ASYNC_FETCH_SIZE = 10000; /** Name/Key of the property specifying whether the fixOnFail option is * enabled or not. This option lets automatically fix the input ADQL query * if its tokenization fails. * @since 2.3 */ public final static String KEY_FIX_ON_FAIL = "fix_on_fail"; /** Default value of the property {@link #KEY_FIX_ON_FAIL}: * {@value #DEFAULT_FIX_ON_FAIL}. * @since 2.3 */ public final static boolean DEFAULT_FIX_ON_FAIL = false; /** Name/Key of the property specifying the name of the DataSource into the JDNI. */ public final static String KEY_DATASOURCE_JNDI_NAME = "datasource_jndi_name"; /** Name/Key of the property specifying the full class name of the JDBC driver. * Alternatively, a shortcut the most known JDBC drivers can be used. The list of these drivers is stored * in {@link #VALUE_JDBC_DRIVERS}. */ public final static String KEY_JDBC_DRIVER = "jdbc_driver"; /** List of the most known JDBC drivers. For the moment this list contains 4 drivers: * oracle ("oracle.jdbc.OracleDriver"), postgresql ("org.postgresql.Driver"), mysql ("com.mysql.jdbc.Driver"), * sqlite ("org.sqlite.JDBC") and h2 ("org.h2.Driver"). */ public final static HashMap VALUE_JDBC_DRIVERS = new HashMap(4); static{ VALUE_JDBC_DRIVERS.put("oracle", "oracle.jdbc.OracleDriver"); VALUE_JDBC_DRIVERS.put("postgresql", "org.postgresql.Driver"); VALUE_JDBC_DRIVERS.put("mysql", "com.mysql.jdbc.Driver"); VALUE_JDBC_DRIVERS.put("sqlite", "org.sqlite.JDBC"); VALUE_JDBC_DRIVERS.put("h2", "org.h2.Driver"); } /** Name/Key of the property specifying the JDBC URL of the database to access. */ public final static String KEY_JDBC_URL = "jdbc_url"; /** Name/Key of the property specifying the database user name to use to access the database. */ public final static String KEY_DB_USERNAME = "db_username"; /** Name/Key of the property specifying the password of the database user. */ public final static String KEY_DB_PASSWORD = "db_password"; /* METADATA KEYS */ /** Name/Key of the property specifying where the list of schemas, tables and columns and their respective metadata * is provided. */ public final static String KEY_METADATA = "metadata"; /** Value of the property {@link #KEY_METADATA} which indicates that metadata are provided in an XML file, whose the * local path is given by the property {@link #KEY_METADATA_FILE}. */ public final static String VALUE_XML = "xml"; /** Value of the property {@link #KEY_METADATA} which indicates that metadata are already in the TAP_SCHEMA of the database. */ public final static String VALUE_DB = "db"; /** Name/Key of the property specifying the local file path of the XML file containing the TAP metadata to load. */ public final static String KEY_METADATA_FILE = "metadata_file"; /* DATALINK KEY */ /** Name/Key of the property providing the API for the Datalink capability. * @since 2.3 */ public final static String KEY_DATALINK = "datalink"; /* HOME PAGE KEY */ /** Name/Key of the property specifying the TAP home page to use. * It can be a file, a URL or a class. If null, the default TAP home page of the library is used. * By default the default library home page is used. */ public final static String KEY_HOME_PAGE = "home_page"; /** Name/Key of the property specifying the MIME type of the set home page. * By default, "text/html" is set. */ public final static String KEY_HOME_PAGE_MIME_TYPE = "home_page_mime_type"; /* EXAMPLES KEY */ /**

Name/Key of the property specifying the content of the /examples endpoint. * It can be a file or a URL. If null, the TAP service will not have any * /examples endpoint (which is optional in the TAP 1.1 standard.

*

Note: The specified content must be an XHTML+RDFa document whose the expected syntax is * defined either by TAPNotes 1.0 or DALI 1.0.

* @since 2.1 */ public final static String KEY_EXAMPLES = "examples"; /* PROVIDER KEYS */ /** Name/Key of the property specifying the name of the organization/person providing the TAP service. */ public final static String KEY_PROVIDER_NAME = "provider_name"; /** Name/Key of the property specifying the description of the TAP service. */ public final static String KEY_SERVICE_DESCRIPTION = "service_description"; /* UPLOAD KEYS */ /** Name/Key of the property indicating whether the UPLOAD feature must be * enabled or not. By default, this feature is disabled. */ public final static String KEY_UPLOAD_ENABLED = "upload_enabled"; /** Name/Key of the property specifying the default limit (in rows or bytes) * on the uploaded VOTable(s). * @deprecated Since 2.3, use the property {@value #KEY_MAX_UPLOAD_LIMIT} * instead. */ @Deprecated public final static String KEY_DEFAULT_UPLOAD_LIMIT = "upload_default_db_limit"; /** Name/Key of the property specifying the maximum limit (in rows or bytes) * on the uploaded VOTable(s). */ public final static String KEY_MAX_UPLOAD_LIMIT = "upload_max_db_limit"; /** Default value of the property {@value #KEY_MAX_UPLOAD_LIMIT} = * {@value #DEFAULT_MAX_UPLOAD_LIMIT}. * @since 2.3 */ public final static String DEFAULT_MAX_UPLOAD_LIMIT = "1000000r"; /** Name/Key of the property specifying the maximum size of all VOTable(s) * uploaded in a query. * @deprecated Since 2.3, use the property {@value #KEY_MAX_UPLOAD_LIMIT} * and {@value #KEY_MAX_REQUEST_LIMIT} instead. */ @Deprecated public final static String KEY_UPLOAD_MAX_FILE_SIZE = "upload_max_file_size"; /** Default value of the property {@value #KEY_UPLOAD_MAX_FILE_SIZE} = * {@value #DEFAULT_UPLOAD_MAX_FILE_SIZE}. * @deprecated Since 2.3, use the property {@value #KEY_MAX_UPLOAD_LIMIT} * and {@value #KEY_MAX_REQUEST_LIMIT} instead. */ @Deprecated public final static int DEFAULT_UPLOAD_MAX_FILE_SIZE = Integer.MAX_VALUE; /** Name/Key of the property specifying the maximum size of a whole HTTP * Multipart Request. * @since 2.3 */ public final static String KEY_UPLOAD_MAX_REQUEST_SIZE = "upload_max_request_size"; /** Default value of the property {@value #KEY_UPLOAD_MAX_REQUEST_SIZE} = * {@value #DEFAULT_UPLOAD_MAX_REQUEST_SIZE}. * @since 2.3 */ public final static int DEFAULT_UPLOAD_MAX_REQUEST_SIZE = 250 * 1024 * 1024; /* OUTPUT KEYS */ /** Name/Key of the property specifying the list of all result output formats to support. * By default all formats provided by the library are allowed. */ public final static String KEY_OUTPUT_FORMATS = "output_formats"; /** Value of the property {@link #KEY_OUTPUT_FORMATS} which select all formats that the library can provide. */ public final static String VALUE_ALL = "ALL"; /** Value of the property {@link #KEY_OUTPUT_FORMATS} which select a VOTable format. * The format can be parameterized with the VOTable version and serialization. */ public final static String VALUE_VOTABLE = "votable"; /** Value of the property {@link #KEY_OUTPUT_FORMATS} which select a VOTable format. * The format can be parameterized with the VOTable version and serialization. * This value is just an alias of {@link #VALUE_VOTABLE}. */ public final static String VALUE_VOT = "vot"; /** Value of the property {@link #KEY_OUTPUT_FORMATS} which select a FITS format. */ public final static String VALUE_FITS = "fits"; /** Value of the property {@link #KEY_OUTPUT_FORMATS} which select a JSON format. */ public final static String VALUE_JSON = "json"; /** Value of the property {@link #KEY_OUTPUT_FORMATS} which select an HTML format. */ public final static String VALUE_HTML = "html"; /** Value of the property {@link #KEY_OUTPUT_FORMATS} which select a human-readable table. */ public final static String VALUE_TEXT = "text"; /** Value of the property {@link #KEY_OUTPUT_FORMATS} which select a CSV format. */ public final static String VALUE_CSV = "csv"; /** Value of the property {@link #KEY_OUTPUT_FORMATS} which select a TSV format. */ public final static String VALUE_TSV = "tsv"; /** Value of the property {@link #KEY_OUTPUT_FORMATS} which select a Separated-Value format. * This value must be parameterized with the separator to use. */ public final static String VALUE_SV = "sv"; /** Name/Key of the property specifying the number of result rows that should be returned if none is specified by the user. */ public final static String KEY_DEFAULT_OUTPUT_LIMIT = "output_default_limit"; /** Name/Key of the property specifying the maximum number of result rows that can be returned by the TAP service. */ public final static String KEY_MAX_OUTPUT_LIMIT = "output_max_limit"; /* USER IDENTIFICATION */ /** Name/Key of the property specifying the user identification method to use. * None is implemented by the library, so a class must be provided as value of this property. */ public final static String KEY_USER_IDENTIFIER = "user_identifier"; /* ADQL RESTRICTIONS */ /** Name/Key of the property specifying the list of all allowed coordinate systems that can be used in ADQL queries. * By default, all are allowed, but no conversion is done by the library. */ public final static String KEY_COORD_SYS = "coordinate_systems"; /** Name/Key of the property specifying the list of all ADQL geometrical function that can be used in ADQL queries. * By default, all are allowed. */ public final static String KEY_GEOMETRIES = "geometries"; /** Value of {@link #KEY_COORD_SYS} and {@link #KEY_GEOMETRIES} that forbid all possible values. */ public final static String VALUE_NONE = "NONE"; /** Name/Key of the property that lets declare all User Defined Functions that must be allowed in ADQL queries. * By default, all unknown functions are rejected. This default behavior can be totally reversed by using the * value {@link #VALUE_ANY} */ public final static String KEY_UDFS = "udfs"; /** Value of {@link #KEY_UDFS} allowing any unknown function in ADQL queries. Those functions will be considered as UDFs * and will be translated into SQL exactly as they are written in ADQL. */ public final static String VALUE_ANY = "ANY"; /* ADDITIONAL TAP RESOURCES */ /** Name/Key of the property specifying the XSLT stylesheet to use for /capabilities. */ public final static String KEY_CAPABILITIES_STYLESHEET = "capabilities_stylesheet"; /** Name/Key of the property specifying the XSLT stylesheet to use for /tables. */ public final static String KEY_TABLES_STYLESHEET = "tables_stylesheet"; /** Name/Key of the property specifying a list of resources to add to the TAP service (e.g. a ADQL query validator). * By default, this list if empty ; only the default TAP resources exist. */ public final static String KEY_ADD_TAP_RESOURCES = "additional_resources"; /* CUSTOM FACTORY */ /** Name/Key of the property specifying the {@link TAPFactory} class to use instead of the default {@link ConfigurableTAPFactory}. * Setting a value to this property could disable several properties of the TAP configuration file. */ public final static String KEY_TAP_FACTORY = "tap_factory"; /** No instance of this class should be created. */ private TAPConfiguration(){ } /** *

Read the asked property from the given Properties object.

*
    *
  • The returned property value is trimmed (no space at the beginning and at the end of the string).
    • *
  • If the value is empty (length=0), NULL is returned.
    • *
* * @param prop List of property * @param key Property whose the value is requested. * * @return Return property value. */ public final static String getProperty(final Properties prop, final String key){ if (prop == null) return null; String value = prop.getProperty(key); if (value != null){ value = value.trim(); return (value.length() == 0) ? null : value; } return value; } /** * Test whether a property value is a class name. * Expected syntax: a non-empty string surrounded by brackets ('{' and '}'). * * Note: The class name itself is not checked! * * @param value Property value. * * @return true if the given value is formatted as a class name, false otherwise. */ public final static boolean isClassName(final String value){ return (value != null && value.length() > 2 && value.charAt(0) == '{' && value.charAt(value.length() - 1) == '}'); } /** * Fetch the class object corresponding to the class name provided between brackets in the given value. * * @param value Value which is supposed to contain the class name between brackets (see {@link #isClassName(String)} for more details) * @param propertyName Name of the property associated with the parameter "value". * @param expectedType Type of the class expected to be returned ; it is also the type which parameterizes this function: C. * * @return The corresponding Class object. * * @throws TAPException If the class name is incorrect * or if its type is not compatible with the parameterized type C (represented by the parameter "expectedType"). * * @see #isClassName(String) */ @SuppressWarnings("unchecked") public final static Class fetchClass(final String value, final String propertyName, final Class expectedType) throws TAPException{ if (!isClassName(value)) return null; String classPath = value.substring(1, value.length() - 1).trim(); if (classPath.isEmpty()) return null; try{ Class classObject = (Class)Class.forName(classPath); if (!expectedType.isAssignableFrom(classObject)) throw new TAPException("The class specified by the property \"" + propertyName + "\" (" + value + ") is not implementing " + expectedType.getName() + "."); else return classObject; }catch(ClassNotFoundException cnfe){ throw new TAPException("The class specified by the property \"" + propertyName + "\" (" + value + ") can not be found."); }catch(ClassCastException cce){ throw new TAPException("The class specified by the property \"" + propertyName + "\" (" + value + ") is not implementing " + expectedType.getName() + "."); } } /** * Test whether the specified class has a constructor with the specified parameters. * * @param propValue Value which is supposed to contain the class name between brackets (see {@link #isClassName(String)} for more details) * @param propName Name of the property associated with the parameter "propValue". * @param expectedType Type of the class expected to be returned ; it is also the type which parameterizes this function: C. * @param pTypes List of each constructor parameter type. Each type MUST be exactly the type declared in the class constructor to select. NULL or empty array if no parameter. * * @return true if the specified class has a constructor with the specified parameters, * false otherwise. * * @throws TAPException If the class name is incorrect * or if its type is not compatible with the parameterized type C (represented by the parameter "expectedType"). * * @since 2.1 */ public final static boolean hasConstructor(final String propValue, final String propName, final Class expectedType, final Class[] pTypes) throws TAPException{ // Ensure the given name is a class name specification: if (!isClassName(propValue)) throw new TAPException("Class name expected for the property \"" + propName + "\" instead of: \"" + propValue + "\"! The specified class must extend/implement " + expectedType.getName() + "."); // Fetch the class object: Class classObj = fetchClass(propValue, propName, expectedType); try{ // Get a constructor matching the given parameters list: classObj.getConstructor((pTypes == null) ? new Class[0] : pTypes); return true; }catch(Exception e){ return false; } } /** *

Create an instance of the specified class. The class name is expected to be surrounded by {} in the given value.

* *

The instance is created using the empty constructor of the specified class.

* * @param propValue Value which is supposed to contain the class name between brackets (see {@link #isClassName(String)} for more details) * @param propName Name of the property associated with the parameter "propValue". * @param expectedType Type of the class expected to be returned ; it is also the type which parameterizes this function: C. * * @return The corresponding instance. * * @throws TAPException If the class name is incorrect * or if its type is not compatible with the parameterized type C (represented by the parameter "expectedType") * or if the specified class has no empty constructor * or if an error occurred while calling this constructor. * * @see #isClassName(String) * @see #fetchClass(String, String, Class) */ public final static C newInstance(final String propValue, final String propName, final Class expectedType) throws TAPException{ return newInstance(propValue, propName, expectedType, null, null); } /** *

Create an instance of the specified class. The class name is expected to be surrounded by {} in the given value.

* *

IMPORTANT: * The instance is created using the constructor whose the declaration matches exactly with the given list of parameter types. * The number and types of given parameters MUST match exactly to the list of parameter types. *

* * @param propValue Value which is supposed to contain the class name between brackets (see {@link #isClassName(String)} for more details) * @param propName Name of the property associated with the parameter "propValue". * @param expectedType Type of the class expected to be returned ; it is also the type which parameterizes this function: C. * @param pTypes List of each constructor parameter type. Each type MUST be exactly the type declared in the class constructor to select. NULL or empty array if no parameter. * @param parameters List of all constructor parameters. The number of object MUST match exactly the number of classes provided in the parameter pTypes. NULL or empty array if no parameter. * * @return The corresponding instance. * * @throws TAPException If the class name is incorrect * or if its type is not compatible with the parameterized type C (represented by the parameter "expectedType") * or if the constructor with the specified parameters can not be found * or if an error occurred while calling this constructor. * * @see #isClassName(String) * @see #fetchClass(String, String, Class) */ public final static C newInstance(final String propValue, final String propName, final Class expectedType, final Class[] pTypes, final Object[] parameters) throws TAPException{ // Ensure the given name is a class name specification: if (!isClassName(propValue)) throw new TAPException("Class name expected for the property \"" + propName + "\" instead of: \"" + propValue + "\"! The specified class must extend/implement " + expectedType.getName() + "."); Class classObj = null; try{ // Fetch the class object: classObj = fetchClass(propValue, propName, expectedType); // Get a constructor matching the given parameters list: Constructor constructor = classObj.getConstructor((pTypes == null) ? new Class[0] : pTypes); // Finally create a new instance: return constructor.newInstance((parameters == null) ? new Object[0] : parameters); }catch(NoSuchMethodException e){ // List parameters' type: StringBuffer pTypesStr = new StringBuffer(); if (pTypes != null){ for(int i = 0; i < pTypes.length; i++){ if (pTypesStr.length() > 0) pTypesStr.append(", "); if (pTypes[i] == null) pTypesStr.append("NULL"); pTypesStr.append(pTypes[i].getName()); } } // Throw the error: throw new TAPException("Missing constructor " + classObj.getName() + "(" + pTypesStr.toString() + ")! See the value \"" + propValue + "\" of the property \"" + propName + "\"."); }catch(InstantiationException ie){ throw new TAPException("Impossible to create an instance of an abstract class: \"" + classObj.getName() + "\"! See the value \"" + propValue + "\" of the property \"" + propName + "\"."); }catch(InvocationTargetException ite){ if (ite.getCause() != null){ if (ite.getCause() instanceof TAPException) throw (TAPException)ite.getCause(); else throw new TAPException(ite.getCause()); }else throw new TAPException(ite); }catch(TAPException te){ throw te; }catch(Exception ex){ throw new TAPException("Impossible to create an instance of " + expectedType.getName() + " as specified in the property \"" + propName + "\": \"" + propValue + "\"!", ex); } } /** * Lets parsing a limit (for output, upload, ...) with its numeric value * and its unit. * *

* Here is the expected syntax: num_val[unit]. * Where unit is optional and should be one of the following values: * r or R, B, kB, MB, GB. If the unit is not specified, it is set by * default to ROWS. *

* *

Note: * If the value is strictly less than 0 (whatever is the unit), the * returned value will be -1. *

* * @param value Property value (must follow the limit syntax: * num_val[unit] ; ex: 20kB or 2000 * (for 2000 rows)). * @param propertyName Name of the property which specify the limit. * @param areBytesAllowed Tells whether the unit BYTES is allowed. If not * and a BYTES unit is encountered, then an * exception is thrown. * * @return An array with always 2 items: * [0]=numeric value (of type Integer), * [1]=unit (of type {@link LimitUnit}). * * @throws TAPException If the syntax is incorrect * or if a not allowed unit has been used. * * @see #parseLimit(String, String, boolean, boolean) */ public final static Object[] parseLimit(String value, final String propertyName, final boolean areBytesAllowed) throws TAPException{ return parseLimit(value, propertyName, areBytesAllowed, false); } /** * Lets parsing a limit (for output, upload, ...) with its numeric value * and its unit. * *

* Here is the expected syntax: num_val[unit]. * Where unit is optional and should be one of the following values: * r or R, B, kB, MB, GB. If the unit is not specified, it is set by * default to ROWS. *

* *

Note: * If the value is strictly less than 0 (whatever is the unit), the * returned value will be -1. *

* * @param value Property value (must follow the limit syntax: * num_val[unit] ; ex: 20kB or 2000 * (for 2000 rows)). * @param propertyName Name of the property which specify the limit. * @param areBytesAllowed Tells whether the unit BYTES is allowed. If not * and a BYTES unit is encountered, then an * exception is thrown. * @param longValue true to get the limit as a long, * false to get it as an int. * * @return An array with always 2 items: * [0]=numeric value (of type Integer or Long in function of the * parameter longValue), * [1]=unit (of type {@link LimitUnit}). * * @throws TAPException If the syntax is incorrect * or if a not allowed unit has been used. * * @since 2.3 */ public final static Object[] parseLimit(String value, final String propertyName, final boolean areBytesAllowed, final boolean longValue) throws TAPException{ // Remove any whitespace inside or outside the numeric value and its unit: if (value != null) value = value.replaceAll("\\s", ""); // If empty value, return an infinite limit: if (value == null || value.length() == 0) return (longValue ? new Object[]{ new Long(-1L), LimitUnit.rows } : new Object[]{ new Integer(-1), LimitUnit.rows }); // A. Parse the string from the end in order to extract the unit part. // The final step of the loop is the extraction of the numeric value, when the first digit is encountered. long numValue = -1; LimitUnit unit; StringBuffer buf = new StringBuffer(); for(int i = value.length() - 1; i >= 0; i--){ // if a digit, extract the numeric value: if (value.charAt(i) >= '0' && value.charAt(i) <= '9'){ try{ numValue = Long.parseLong(value.substring(0, i + 1)); break; }catch(NumberFormatException nfe){ throw new TAPException("Integer expected for the property " + propertyName + " for the substring \"" + value.substring(0, i + 1) + "\" of the whole value: \"" + value + "\"!"); } } // if a character, store it for later processing: else buf.append(value.charAt(i)); } // B. Parse the unit. // if no unit, set ROWS by default: if (buf.length() == 0) unit = LimitUnit.rows; // if the unit is too long, throw an exception: else if (buf.length() > 2) throw new TAPException("Unknown limit unit (" + buf.reverse().toString() + ") for the property " + propertyName + ": \"" + value + "\"!"); // try to identify the unit: else{ // the base unit: bytes or rows switch(buf.charAt(0)){ case 'B': if (!areBytesAllowed) throw new TAPException("BYTES unit is not allowed for the property " + propertyName + " (" + value + ")!"); unit = LimitUnit.bytes; break; case 'r': case 'R': unit = LimitUnit.rows; break; default: throw new TAPException("Unknown limit unit (" + buf.reverse().toString() + ") for the property " + propertyName + ": \"" + value + "\"!"); } // the 10-power of the base unit, if any: if (buf.length() > 1){ if (unit == LimitUnit.bytes){ switch(buf.charAt(1)){ case 'k': unit = LimitUnit.kilobytes; break; case 'M': unit = LimitUnit.megabytes; break; case 'G': unit = LimitUnit.gigabytes; break; default: throw new TAPException("Unknown limit unit (" + buf.reverse().toString() + ") for the property " + propertyName + ": \"" + value + "\"!"); } }else throw new TAPException("Unknown limit unit (" + buf.reverse().toString() + ") for the property " + propertyName + ": \"" + value + "\"!"); } } if (numValue < 0) return (longValue ? new Object[]{ new Long(-1L), unit } : new Object[]{ new Integer(-1), unit }); else return (longValue ? new Object[]{ new Long(numValue), unit } : new Object[]{ new Integer((int)numValue), unit }); } }