com.puppycrawl.tools.checkstyle

Class ConfigurationLoader

java.lang.Object

com.puppycrawl.tools.checkstyle.ConfigurationLoader

public final class ConfigurationLoader
extends java.lang.Object

Loads a configuration from a standard configuration XML file.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private class	ConfigurationLoader.InternalLoader Implements the SAX document handler interfaces, so they do not appear in the public API of the ConfigurationLoader.

Field Summary

Fields

Modifier and Type	Field and Description
private java.util.Deque<DefaultConfiguration>	configStack The loaded configurations.
private Configuration	configuration The Configuration that is being built.
private static char	DOLLAR_SIGN Dollar sign literal.
private static java.lang.String	DTD_PUBLIC_ID_1_0 The public ID for version 1_0 of the configuration dtd.
private static java.lang.String	DTD_PUBLIC_ID_1_1 The public ID for version 1_1 of the configuration dtd.
private static java.lang.String	DTD_PUBLIC_ID_1_2 The public ID for version 1_2 of the configuration dtd.
private static java.lang.String	DTD_PUBLIC_ID_1_3 The public ID for version 1_3 of the configuration dtd.
private static java.lang.String	DTD_RESOURCE_NAME_1_0 The resource for version 1_0 of the configuration dtd.
private static java.lang.String	DTD_RESOURCE_NAME_1_1 The resource for version 1_1 of the configuration dtd.
private static java.lang.String	DTD_RESOURCE_NAME_1_2 The resource for version 1_2 of the configuration dtd.
private static java.lang.String	DTD_RESOURCE_NAME_1_3 The resource for version 1_3 of the configuration dtd.
private boolean	omitIgnoredModules Flags if modules with the severity 'ignore' should be omitted.
private PropertyResolver	overridePropsResolver Property resolver.
private ConfigurationLoader.InternalLoader	saxHandler The SAX document handler.
private static java.lang.String	UNABLE_TO_PARSE_EXCEPTION_PREFIX Prefix for the exception when unable to parse resource.

Constructor Summary

Constructors

Modifier	Constructor and Description
private	ConfigurationLoader(PropertyResolver overrideProps, boolean omitIgnoredModules) Creates a new ConfigurationLoader instance.

Method Summary

Modifier and Type	Method and Description
private static java.util.Map<java.lang.String,java.lang.String>	createIdToResourceNameMap() Creates mapping between local resources and dtd ids.
static Configuration	loadConfiguration(org.xml.sax.InputSource configSource, PropertyResolver overridePropsResolver, boolean omitIgnoredModules) Returns the module configurations from a specified input source.
static Configuration	loadConfiguration(java.io.InputStream configStream, PropertyResolver overridePropsResolver, boolean omitIgnoredModules) Deprecated. As this method does not provide a valid system ID, preventing resolution of external entities, a version using an InputSource should be used instead
static Configuration	loadConfiguration(java.lang.String config, PropertyResolver overridePropsResolver) Returns the module configurations in a specified file.
static Configuration	loadConfiguration(java.lang.String config, PropertyResolver overridePropsResolver, boolean omitIgnoredModules) Returns the module configurations in a specified file.
private void	parseInputSource(org.xml.sax.InputSource source) Parses the specified input source loading the configuration information.
private static void	parsePropertyString(java.lang.String value, java.util.List<java.lang.String> fragments, java.util.List<java.lang.String> propertyRefs) Parses a string containing ${xxx} style property references into two lists.
private static java.lang.String	replaceProperties(java.lang.String value, PropertyResolver props, java.lang.String defaultValue) Replaces ${xxx} style constructions in the given value with the string value of the corresponding data types.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

DTD_PUBLIC_ID_1_0

private static final java.lang.String DTD_PUBLIC_ID_1_0

The public ID for version 1_0 of the configuration dtd.

See Also:

Constant Field Values

DTD_RESOURCE_NAME_1_0

private static final java.lang.String DTD_RESOURCE_NAME_1_0

The resource for version 1_0 of the configuration dtd.

See Also:

Constant Field Values

DTD_PUBLIC_ID_1_1

private static final java.lang.String DTD_PUBLIC_ID_1_1

The public ID for version 1_1 of the configuration dtd.

See Also:

Constant Field Values

DTD_RESOURCE_NAME_1_1

private static final java.lang.String DTD_RESOURCE_NAME_1_1

The resource for version 1_1 of the configuration dtd.

See Also:

Constant Field Values

DTD_PUBLIC_ID_1_2

private static final java.lang.String DTD_PUBLIC_ID_1_2

The public ID for version 1_2 of the configuration dtd.

See Also:

Constant Field Values

DTD_RESOURCE_NAME_1_2

private static final java.lang.String DTD_RESOURCE_NAME_1_2

The resource for version 1_2 of the configuration dtd.

See Also:

Constant Field Values

DTD_PUBLIC_ID_1_3

private static final java.lang.String DTD_PUBLIC_ID_1_3

The public ID for version 1_3 of the configuration dtd.

See Also:

Constant Field Values

DTD_RESOURCE_NAME_1_3

private static final java.lang.String DTD_RESOURCE_NAME_1_3

The resource for version 1_3 of the configuration dtd.

See Also:

Constant Field Values

UNABLE_TO_PARSE_EXCEPTION_PREFIX

private static final java.lang.String UNABLE_TO_PARSE_EXCEPTION_PREFIX

Prefix for the exception when unable to parse resource.

See Also:

Constant Field Values

DOLLAR_SIGN

private static final char DOLLAR_SIGN

Dollar sign literal.

See Also:

Constant Field Values

saxHandler

private final ConfigurationLoader.InternalLoader saxHandler

The SAX document handler.

overridePropsResolver

private final PropertyResolver overridePropsResolver

Property resolver.

configStack

private final java.util.Deque<DefaultConfiguration> configStack

The loaded configurations.

omitIgnoredModules

private final boolean omitIgnoredModules

Flags if modules with the severity 'ignore' should be omitted.

configuration

private Configuration configuration

The Configuration that is being built.

Constructor Detail

ConfigurationLoader

private ConfigurationLoader(PropertyResolver overrideProps,
                            boolean omitIgnoredModules)
                     throws javax.xml.parsers.ParserConfigurationException,
                            org.xml.sax.SAXException

Creates a new ConfigurationLoader instance.

Parameters:

overrideProps - resolver for overriding properties

omitIgnoredModules - true if ignored modules should be omitted

Throws:

javax.xml.parsers.ParserConfigurationException - if an error occurs

org.xml.sax.SAXException - if an error occurs

Method Detail

createIdToResourceNameMap

private static java.util.Map<java.lang.String,java.lang.String> createIdToResourceNameMap()

Creates mapping between local resources and dtd ids.

Returns:

map between local resources and dtd ids.

parseInputSource

private void parseInputSource(org.xml.sax.InputSource source)
                       throws java.io.IOException,
                              org.xml.sax.SAXException

Parses the specified input source loading the configuration information. The stream wrapped inside the source, if any, is NOT explicitly closed after parsing, it is the responsibility of the caller to close the stream.

Parameters:

source - the source that contains the configuration data

Throws:

java.io.IOException - if an error occurs

org.xml.sax.SAXException - if an error occurs

loadConfiguration

public static Configuration loadConfiguration(java.lang.String config,
                                              PropertyResolver overridePropsResolver)
                                       throws CheckstyleException

Returns the module configurations in a specified file.

Parameters:

config - location of config file, can be either a URL or a filename

overridePropsResolver - overriding properties

Returns:

the check configurations

Throws:

CheckstyleException - if an error occurs

loadConfiguration

public static Configuration loadConfiguration(java.lang.String config,
                                              PropertyResolver overridePropsResolver,
                                              boolean omitIgnoredModules)
                                       throws CheckstyleException

Returns the module configurations in a specified file.

Parameters:

config - location of config file, can be either a URL or a filename

overridePropsResolver - overriding properties

omitIgnoredModules - true if modules with severity 'ignore' should be omitted, false otherwise

Returns:

the check configurations

Throws:

CheckstyleException - if an error occurs

loadConfiguration

@Deprecated
public static Configuration loadConfiguration(java.io.InputStream configStream,
                                                          PropertyResolver overridePropsResolver,
                                                          boolean omitIgnoredModules)
                                                   throws CheckstyleException

Deprecated. As this method does not provide a valid system ID, preventing resolution of external entities, a version using an InputSource should be used instead

Returns the module configurations from a specified input stream. Note that clients are required to close the given stream by themselves

Parameters:

configStream - the input stream to the Checkstyle configuration

overridePropsResolver - overriding properties

omitIgnoredModules - true if modules with severity 'ignore' should be omitted, false otherwise

Returns:

the check configurations

Throws:

CheckstyleException - if an error occurs

loadConfiguration

public static Configuration loadConfiguration(org.xml.sax.InputSource configSource,
                                              PropertyResolver overridePropsResolver,
                                              boolean omitIgnoredModules)
                                       throws CheckstyleException

Returns the module configurations from a specified input source. Note that if the source does wrap an open byte or character stream, clients are required to close that stream by themselves

Parameters:

configSource - the input stream to the Checkstyle configuration

overridePropsResolver - overriding properties

omitIgnoredModules - true if modules with severity 'ignore' should be omitted, false otherwise

Returns:

the check configurations

Throws:

CheckstyleException - if an error occurs

replaceProperties

private static java.lang.String replaceProperties(java.lang.String value,
                                                  PropertyResolver props,
                                                  java.lang.String defaultValue)
                                           throws CheckstyleException

Replaces ${xxx} style constructions in the given value with the string value of the corresponding data types.

Code copied from ant - http://cvs.apache.org/viewcvs/jakarta-ant/src/main/org/apache/tools/ant/ProjectHelper.java

Parameters:

value - The string to be scanned for property references. May be null, in which case this method returns immediately with no effect.

props - Mapping (String to String) of property names to their values. Must not be null.

defaultValue - default to use if one of the properties in value cannot be resolved from props.

Returns:

the original string with the properties replaced, or null if the original string is null.

Throws:

CheckstyleException - if the string contains an opening ${} without a closing {@code }

parsePropertyString

private static void parsePropertyString(java.lang.String value,
                                        java.util.List<java.lang.String> fragments,
                                        java.util.List<java.lang.String> propertyRefs)
                                 throws CheckstyleException

Parses a string containing ${xxx} style property references into two lists. The first list is a collection of text fragments, while the other is a set of string property names. null entries in the first list indicate a property reference from the second list.

Code copied from ant - http://cvs.apache.org/viewcvs/jakarta-ant/src/main/org/apache/tools/ant/ProjectHelper.java

Parameters:

value - Text to parse. Must not be null.

fragments - List to add text fragments to. Must not be null.

propertyRefs - List to add property names to. Must not be null.

Throws:

CheckstyleException - if the string contains an opening ${} without a closing {@code }