GeoTools (Geotools modules 21.0 API)

Object
- GeoTools

```
public final class GeoTools
extends Object
```
Static methods relative to the global GeoTools configuration. GeoTools can be configured in a system-wide basis through system properties, some of them are declared as String constants in this class.
There are many aspects to the configuration of GeoTools:
- Default Settings: Are handled as the Hints returned by getDefaultHints(), the default values can be provided in application code, or specified using system properties.
- Integration JNDI: Telling the GeoTools library about the facilities of an application, or application container takes several forms. This class provides the init(InitialContext) method allowing to tell GeoTools about the JNDI context to use.
- Integration Plugins: If hosting GeoTools in a alternate plugin system such as Spring or OSGi, application may needs to hunt down the FactoryFinders and register additional "Factory Iterators" for GeoTools to search using the addFactoryIteratorProvider(org.geotools.util.factory.FactoryIteratorProvider) method.
Since:

2.4

Author:

Jody Garnett, Martin Desruisseaux

Field Summary

Fields
Modifier and Type	Field and Description
`static String`	`CRS_AUTHORITY_EXTRA_DIRECTORY` The system property key for the default value to be assigned to the `CRS_AUTHORITY_EXTRA_DIRECTORY` hint.
`static String`	`ENCODE_WKT` The system property key for the default value to be assigned to the `Hints.ENCODE_EWKT` hint.
`static String`	`ENTITY_RESOLVER` The system property key for the default value to be assigned to the `ENTITY_RESOLVER` hint.
`static String`	`EPSG_DATA_SOURCE` The system property key for the default value to be assigned to the `EPSG_DATA_SOURCE` hint.
`static String`	`FORCE_LONGITUDE_FIRST_AXIS_ORDER` The system property key for the default value to be assigned to the `FORCE_LONGITUDE_FIRST_AXIS_ORDER` hint.
`static String`	`LOCAL_DATE_TIME_HANDLING` The system property key for the default value to be assigned to the `Hints.LOCAL_DATE_TIME_HANDLING` hint.
`static String`	`RESAMPLE_TOLERANCE` The system property key for the default value to be assigned to the `RESAMPLE_TOLERANCE` hint.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`static void`	`addChangeListener(ChangeListener listener)` Adds the specified listener to the list of objects to inform when system-wide configuration changed.
`static void`	`addClassLoader(ClassLoader classLoader)` Adds a class loader to be included in the list of class loaders that are used to locate GeoTools plug-ins.
`static Hints`	`addDefaultHints(Hints hints)` Used to combine provided hints with global GeoTools defaults.
`static void`	`addFactoryIteratorProvider(FactoryIteratorProvider provider)` Adds an alternative way to search for factory implementations.
`static void`	`clearInitialContext()` Clears the initial context (closes it if not null)
`static void`	`fireConfigurationChanged()` Informs every listeners that system-wide configuration changed.
`static String`	`fixName(Context context, String name)` Converts a GeoTools name to the syntax used by the specified JNDI context.
`static String`	`fixName(String name)` Converts a GeoTools name to the syntax used by the GeoTools JNDI context.
`static String`	`getAboutInfo()` Returns summary information about GeoTools and the current environment.
`static Properties`	`getBuildProperties()` Returns the raw properties object containing all properties about this GeoTools build.
`static String`	`getBuildRevision()` Reports back the vcs revision at which the version of GeoTools was built.
`static String`	`getBuildTimestamp()` Reports back the timestamp at which the version of GeoTools of built.
`static Hints`	`getDefaultHints()` Returns the default set of hints used for the various utility classes.
`static EntityResolver`	`getEntityResolver(Hints hints)` Returns the default entity resolver, used to configure `SAXParser`.
`static String`	`getEnvironmentInfo()` Returns summary information about the GeoTools version and the host environment.
`static String`	`getGeoToolsJarInfo()` Returns the names of the GeoTools jars on the classpath.
`static InitialContext`	`getInitialContext(Hints hints)` Returns the default initial context.
`static Manifest`	`getManifest(Class<?> type)` Lookup the MANIFEST.MF for the provided class.
`static Version`	`getVersion()` Reports back the version of GeoTools being used.
`static Version`	`getVersion(Class<?> type)` Lookup version for provided class.
`static void`	`init()` Initializes GeoTools for use.
`static void`	`init(Hints hints)` Initializes GeoTools for use.
`static void`	`init(InitialContext applicationContext)` Provides GeoTools with the JNDI context for resource lookup.
`static void`	`main(String[] args)` Reports the GeoTools version number to the standard output stream.
`static void`	`removeChangeListener(ChangeListener listener)` Removes the specified listener from the list of objects to inform when system-wide configuration changed.
`static void`	`removeFactoryIteratorProvider(FactoryIteratorProvider provider)` Removes a provider that was previously added.
`void`	`setLoggerFactory(LoggerFactory<?> factory)` Sets the global logger factory.

Methods inherited from class Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - CRS_AUTHORITY_EXTRA_DIRECTORY
```
public static final String CRS_AUTHORITY_EXTRA_DIRECTORY
```
    The system property key for the default value to be assigned to the CRS_AUTHORITY_EXTRA_DIRECTORY hint.
    
    See Also:
    
    Hints.CRS_AUTHORITY_EXTRA_DIRECTORY, getDefaultHints(), Constant Field Values
  - EPSG_DATA_SOURCE
```
public static final String EPSG_DATA_SOURCE
```
    The system property key for the default value to be assigned to the EPSG_DATA_SOURCE hint.
    
    See Also:
    
    Hints.EPSG_DATA_SOURCE, getDefaultHints(), Constant Field Values
  - FORCE_LONGITUDE_FIRST_AXIS_ORDER
```
public static final String FORCE_LONGITUDE_FIRST_AXIS_ORDER
```
    The system property key for the default value to be assigned to the FORCE_LONGITUDE_FIRST_AXIS_ORDER hint.
    This setting can provide a transition path for projects expecting a (longitude, latitude) axis order on a system-wide level. Application developpers can set the default value as below:
    System.setProperty(FORCE_LONGITUDE_FIRST_AXIS_ORDER, "true");
    Note that this system property applies mostly to the default EPSG factory. Most other factories ("CRS", "AUTO", etc.) don't need this property since they use (longitude, latitude) axis order by design.
    See Also:
    
    Hints.FORCE_LONGITUDE_FIRST_AXIS_ORDER, getDefaultHints(), Constant Field Values
  - ENTITY_RESOLVER
```
public static final String ENTITY_RESOLVER
```
    The system property key for the default value to be assigned to the ENTITY_RESOLVER hint.
    This setting specifies the XML Entity resolver to be used when configuring a SAXParser
    
    See Also:
    
    Hints.ENTITY_RESOLVER, getDefaultHints(), Constant Field Values
  - RESAMPLE_TOLERANCE
```
public static final String RESAMPLE_TOLERANCE
```
    The system property key for the default value to be assigned to the RESAMPLE_TOLERANCE hint.
    This setting specifies the tolerance used when linearizing warp transformation into piecewise linear ones, by default it is 0.333 pixels
    
    See Also:
    
    Hints.RESAMPLE_TOLERANCE, getDefaultHints(), Constant Field Values
  - LOCAL_DATE_TIME_HANDLING
```
public static final String LOCAL_DATE_TIME_HANDLING
```
    The system property key for the default value to be assigned to the Hints.LOCAL_DATE_TIME_HANDLING hint.
    This setting specifies if dates shall be treated as local dates ignoring time zones.
    
    Since:
    
    15.0
    
    See Also:
    
    Hints.LOCAL_DATE_TIME_HANDLING, getDefaultHints(), Constant Field Values
  - ENCODE_WKT
```
public static final String ENCODE_WKT
```
    The system property key for the default value to be assigned to the Hints.ENCODE_EWKT hint.
    This setting specifies if geometries with CoordinateReferenceSystem in the user data shall be encoded as EWKT or not.
    
    Since:
    
    19.0
    
    See Also:
    
    Hints.ENCODE_EWKT, getDefaultHints(), Constant Field Values
- Method Detail
  - getAboutInfo
```
public static String getAboutInfo()
```
    Returns summary information about GeoTools and the current environment. Calls getEnvironmentInfo() followed by getGeoToolsJarInfo() and concatenates their results.
    
    Returns:
    
    requested information as a string
  - getEnvironmentInfo
```
public static String getEnvironmentInfo()
```
    Returns summary information about the GeoTools version and the host environment.
    
    Returns:
    
    information as a String
  - getGeoToolsJarInfo
```
public static String getGeoToolsJarInfo()
```
    Returns the names of the GeoTools jars on the classpath.
    
    Returns:
    
    list of jars as a formatted string
  - getBuildRevision
```
public static String getBuildRevision()
```
    Reports back the vcs revision at which the version of GeoTools was built.
    
    Returns:
    
    The svn revision.
  - getBuildTimestamp
```
public static String getBuildTimestamp()
```
    Reports back the timestamp at which the version of GeoTools of built.
    
    Returns:
    
    The build timestamp.
  - getBuildProperties
```
public static Properties getBuildProperties()
```
    Returns the raw properties object containing all properties about this GeoTools build.
    Example from the 14.3 release:
    - version=14.3
    - build.revision=2298d56000bef6f526b521a480316ea544c74571
    - build.branch=rel_14.3
    - build.timestamp=21-Mar-2016 21:30
  - getVersion
```
public static Version getVersion()
```
    Reports back the version of GeoTools being used.
    
    Returns:
    
    The current GeoTools version.
  - getVersion
```
public static Version getVersion(Class<?> type)
```
    Lookup version for provided class.
    Version number is determined by either:
    - Use of jar naming convention, matching jars such as jts-1.13.jar
    - Use of MANIFEST.MF (to check Implementation-Version, Project-Version)
    - To assist
    Parameters:
    
    type -
    
    Returns:
    
    Version (or null if unavailable)
  - getManifest
```
public static Manifest getManifest(Class<?> type)
```
    Lookup the MANIFEST.MF for the provided class.
    This can be used to quickly verify packaging information.
    
    Parameters:
    
    type -
    
    Returns:
    
    MANIFEST.MF contents, please note contents may be empty when running from IDE
  - setLoggerFactory
```
public void setLoggerFactory(LoggerFactory<?> factory)
```
    Sets the global logger factory.
    This method is the same as Logging.GEOTOOLS.setLoggerFactory(factory). GeoTools ships with support for Commons-logging and log4j. This method exists to allow you supply your own implementation (this is sometimes required when using a GeoTools application in an exotic environment like Eclipse, OC4J or your application).
    
    Parameters:
    
    factory - The logger factory to use.
    
    Since:
    
    2.4
    
    See Also:
    
    Logging.setLoggerFactory(LoggerFactory)
  - init
```
public static void init(Hints hints)
```
    Initializes GeoTools for use. This convenience method performs various tasks (more may be added in the future), including setting up the Java logging framework in one of the following states:
    - If the Commons-logging framework is available, then every logging message in the org.geotools namespace sent to the Java logger are redirected to Commons-logging.
    - Otherwise if the Log4J framework is available, then every logging message in the org.geotools namespace sent to the Java logger are redirected to Log4J.
    - Otherwise, the Java logging formatter for console output is replaced by a monoline formatter.
    In addition, the default hints are initialized to the specified hints.
    Invoking this method is not required fpr the GeoTools library to function. It is just a convenience method for overwriting select Java and GeoTools default settings. Supplying these defaults is not desirable in all settings, such as writing test cases.
    Example of typical invocation in a GeoServer environment:
```
 Hints hints = new Hints();
 hints.put(Hints.FORCE_LONGITUDE_FIRST_AXIS_ORDER, Boolean.TRUE);
 hints.put(Hints.FORCE_AXIS_ORDER_HONORING, "http");
 GeoTools.init(hints);
 
```
    Parameters:
    
    hints - The hints to use.
    
    See Also:
    
    Logging.setLoggerFactory(String), Logging.forceMonolineConsoleOutput(), Hints.putSystemDefault(java.awt.RenderingHints), getDefaultHints()
  - init
```
public static void init()
```
    Initializes GeoTools for use. This convenience method performs various tasks (more may be added in the future), including setting up the Java logging framework in one of the following states:
    - If the Commons-logging framework is available, then every logging message in the org.geotools namespace sent to the Java logger are redirected to Commons-logging.
    - Otherwise if the Log4J framework is available, then every logging message in the org.geotools namespace sent to the Java logger are redirected to Log4J.
    - Otherwise, the Java logging formatter for console output is replaced by a monoline formatter.
    Invoking this method is not required fpr the GeoTools library to function. It is just a convenience method for overwriting select Java and GeoTools default settings. Supplying these defaults is not desirable in all settings, such as writing test cases.
    See Also:
    
    Logging.setLoggerFactory(String), Logging.forceMonolineConsoleOutput(), Hints.putSystemDefault(java.awt.RenderingHints), getDefaultHints()
  - init
```
public static void init(InitialContext applicationContext)
```
    Provides GeoTools with the JNDI context for resource lookup.
    
    Parameters:
    
    applicationContext - The initial context to use.
    
    Since:
    
    2.4
    
    See Also:
    
    getInitialContext(org.geotools.util.factory.Hints)
  - getDefaultHints
```
public static Hints getDefaultHints()
```
    Returns the default set of hints used for the various utility classes. This default set is determined by:
    - The available. Some property keys are enumerated in the GeoTools class.
    - Any hints added by call to the Hints.putSystemDefault(java.awt.RenderingHints) or init(org.geotools.util.factory.Hints) method.
    Long term plan: We would like to transition the utility classes to being injected with their required factories, either by taking Hints as part of their constructor, or otherwise. Making this change would be a three step process 1) create instance methods for each static final class method 2) create an singleton instance of the class 3) change each static final class method into a call to the singleton. With this in place we could then encourage client code to make use of utility class instances before eventually retiring the static final methods.
    Returns:
    
    A copy of the default hints. It is safe to add to it.
  - addDefaultHints
```
public static Hints addDefaultHints(Hints hints)
```
    Used to combine provided hints with global GeoTools defaults.
    
    Parameters:
    
    hints -
    
    Returns:
  - getEntityResolver
```
public static EntityResolver getEntityResolver(Hints hints)
```
    Returns the default entity resolver, used to configure SAXParser.
    
    Parameters:
    
    hints - An optional set of hints, or null if none, see Hints.ENTITY_RESOLVER.
    
    Returns:
    
    An entity resolver (never null)
  - getInitialContext
```
public static InitialContext getInitialContext(Hints hints)
                                        throws NamingException
```
    Returns the default initial context.
    
    Parameters:
    
    hints - An optional set of hints, or null if none.
    
    Returns:
    
    The initial context (never null).
    
    Throws:
    
    NamingException - if the initial context can't be created.
    
    Since:
    
    2.4
    
    See Also:
    
    init(InitialContext)
  - clearInitialContext
```
public static void clearInitialContext()
                                throws NamingException
```
    Clears the initial context (closes it if not null)
    
    Throws:
    
    NamingException
    
    Since:
    
    15.0
  - fixName
```
public static String fixName(String name)
```
    Converts a GeoTools name to the syntax used by the GeoTools JNDI context. Names may be constructed in a variety of ways depending on the implementation of InitialContext. GeoTools uses "jdbc:EPSG" internally, but many implementaitons use the form "jdbc/EPSG". Calling this method before use will set the name right.
    
    Parameters:
    
    name - Name of the form "jdbc:EPSG", or null.
    
    Returns:
    
    Name fixed up with Context.composeName(String,String), or null if the given name was null.
    
    Since:
    
    2.4
  - fixName
```
public static String fixName(Context context,
                             String name)
```
    Converts a GeoTools name to the syntax used by the specified JNDI context. This method is similar to fixName(String), but uses the specified context instead of the GeoTools one.
    
    Parameters:
    
    context - The context to use, or null if none.
    
    name - Name of the form "jdbc:EPSG", or null.
    
    Returns:
    
    Name fixed up with Context.composeName(String,String), or null if the given name was null.
    
    Since:
    
    2.4
  - addFactoryIteratorProvider
```
public static void addFactoryIteratorProvider(FactoryIteratorProvider provider)
```
    Adds an alternative way to search for factory implementations. FactoryRegistry has a default mechanism bundled in it, which uses the content of all META-INF/services directories found on the classpath. This addFactoryIteratorProvider method allows to specify additional discovery algorithms. It may be useful in the context of some frameworks that use the constructor injection pattern, like the Spring framework.
    
    Parameters:
    
    provider - A new provider for factory iterators.
  - removeFactoryIteratorProvider
```
public static void removeFactoryIteratorProvider(FactoryIteratorProvider provider)
```
    Removes a provider that was previously added. Note that factories already obtained from the specified provider will not be deregistered by this method.
    
    Parameters:
    
    provider - The provider to remove.
  - addChangeListener
```
public static void addChangeListener(ChangeListener listener)
```
    Adds the specified listener to the list of objects to inform when system-wide configuration changed.
    
    Parameters:
    
    listener - The listener to add.
  - removeChangeListener
```
public static void removeChangeListener(ChangeListener listener)
```
    Removes the specified listener from the list of objects to inform when system-wide configuration changed.
    
    Parameters:
    
    listener - The listener to remove.
  - fireConfigurationChanged
```
public static void fireConfigurationChanged()
```
    Informs every listeners that system-wide configuration changed.
  - addClassLoader
```
public static void addClassLoader(ClassLoader classLoader)
```
    Adds a class loader to be included in the list of class loaders that are used to locate GeoTools plug-ins.
    Client code that calls this method may also need to call FactoryRegistry.scanForPlugins() on any existing registry to force it to clear its cache and use the added class loader to locate plugins.
    
    Parameters:
    
    classLoader - The class loader.
  - main
```
public static void main(String[] args)
```
    Reports the GeoTools version number to the standard output stream.
    
    Parameters:
    
    args - Command line arguments.

Class GeoTools

Field Summary

Method Summary

Methods inherited from class Object

Field Detail

CRS_AUTHORITY_EXTRA_DIRECTORY

EPSG_DATA_SOURCE

FORCE_LONGITUDE_FIRST_AXIS_ORDER

ENTITY_RESOLVER

RESAMPLE_TOLERANCE

LOCAL_DATE_TIME_HANDLING

ENCODE_WKT

Method Detail

getAboutInfo

getEnvironmentInfo

getGeoToolsJarInfo

getBuildRevision

getBuildTimestamp

getBuildProperties

getVersion

getVersion

getManifest

setLoggerFactory

init

init

init

getDefaultHints

addDefaultHints

getEntityResolver

getInitialContext

clearInitialContext

fixName

fixName

addFactoryIteratorProvider

removeFactoryIteratorProvider

addChangeListener

removeChangeListener

fireConfigurationChanged

addClassLoader

main