com.expedia.tesla.compiler

Class Util

java.lang.Object

com.expedia.tesla.compiler.Util

Direct Known Subclasses:

CppUtils, CSharpUtils, JavaUtils

public class Util
extends Object

Tesla compiler utility methods.

Author:

Yunfei Zuo

Constructor Summary

Constructors

Constructor and Description
Util()

Method Summary

Methods

Modifier and Type	Method and Description
static <T> String	commaSeparate(Collection<T> list) Convert a list of elements to a single comma separated string.
static <T> String	delimiterSeparate(Collection<T> list, String delimiter) Convert a list of elements to a single delimiter separated string.
static Collection<String>	expandWildcard(Collection<String> pathOrPatterns) Expand glob file patterns to path strings.
static String	firstCharLowerCase(String s) Make the first character lower case.
static String	firstCharUpperCase(String s) Make the first character upper case.
static void	forceMkdirParent(File file) Makes any necessary but nonexistent parent directories for a given File.
static Collection<UserType>	getAllUserTypes(Collection<Schema> schemas) Get a set of all user types defined in all schemas.
static String	getNewLine() Get a new line character.
static Class<?>	loadClass(String name, String classpath) Load a Java class by it's full name.
static Class<?>	loadClass(String name, URL[] urls) Load a Java class by it's full name.
static URL[]	parseClassPath(String classpath) Parse a Java classpath string to URLs.
static String	toNameSpace(String fullName) Extract name space from a full qualified type name.
static String	toShortName(String fullName) Extract short name from a full qualified type name.

Methods inherited from class java.lang.Object

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

Constructor Detail

Util

public Util()

Method Detail

commaSeparate

public static <T> String commaSeparate(Collection<T> list)

Convert a list of elements to a single comma separated string.

Parameters:

list - the collection of values to join together.

Returns:

a single comma separated string.

delimiterSeparate

public static <T> String delimiterSeparate(Collection<T> list,
                           String delimiter)

Convert a list of elements to a single delimiter separated string.

Parameters:

list - the collection of values to join together.

delimiter - the delimiter that separates values.

Returns:

a single delimiter separated string.

firstCharLowerCase

public static String firstCharLowerCase(String s)

Make the first character lower case.

The input string must at least has 2 characters.

Parameters:

s - the input string value.

Returns:

the string with first character lower case.

firstCharUpperCase

public static String firstCharUpperCase(String s)

Make the first character upper case.

The input string must at least has 2 characters.

Parameters:

s - the input string value.

Returns:

the string with first character upper case.

toShortName

public static String toShortName(String fullName)

Extract short name from a full qualified type name.

The full name has the format of namespace.typename.

Parameters:

fullName - full type name.

Returns:

short name.

toNameSpace

public static String toNameSpace(String fullName)

Extract name space from a full qualified type name.

The full name has the format of namespace.typename.

Parameters:

fullName - full type name.

Returns:

name space.

getNewLine

public static String getNewLine()

Get a new line character.

Returns:

a new line character.

getAllUserTypes

public static Collection<UserType> getAllUserTypes(Collection<Schema> schemas)

Get a set of all user types defined in all schemas. It's the union of all user type definitions.

Parameters:

schemas - A collection of Tesla schema objects.

Returns:

A set of all user types defined in all schemas

expandWildcard

public static Collection<String> expandWildcard(Collection<String> pathOrPatterns)
                                         throws IOException

Expand glob file patterns to path strings. Any path element that is not a glob pattern will be keep as it is.

Parameters:

pathOrPatterns - glob patterns.

Returns:

The expanded paths.

Throws:

IOException - On IO errors.

parseClassPath

public static URL[] parseClassPath(String classpath)
                            throws IOException

Parse a Java classpath string to URLs. The classpath is represented with the same format of the CLASSPATH variable or -cp java option. It supports the * wildcard.

Parameters:

classpath - the classpath string.

Returns:

URLs.

Throws:

IOException - on IO errors.

loadClass

public static Class<?> loadClass(String name,
                 String classpath)
                          throws ClassNotFoundException,
                                 IOException

Load a Java class by it's full name.

Parameters:

name - The full name of the Java class to load.

classpath - The class paths or jar files from where the Java class be loaded. If this is null or empty string. loadClass will try to load from JVM classpath instead.

Returns:

The java.lang.Class object represents the Java class.

Throws:

ClassNotFoundException - If the class is not found.

IOException - If the jar file cannot open.

loadClass

public static Class<?> loadClass(String name,
                 URL[] urls)
                          throws ClassNotFoundException,
                                 IOException

Load a Java class by it's full name.

Parameters:

name - The full name of the Java class to load.

urls - An array of URL objects represent class paths or jar files.

Returns:

The java.lang.Class object represents the Java class.

Throws:

ClassNotFoundException - If the class is not found.

IOException - If the jar file cannot open.

forceMkdirParent

public static void forceMkdirParent(File file)
                             throws IOException

Makes any necessary but nonexistent parent directories for a given File. If the parent directory cannot be created then an IOException is thrown.

Workaround for FileUtils.forceMkdirParent in Apache Commons IO 2.5.

Parameters:

file - file with parent to create, must not be null

Throws:

NullPointerException - if the file is null

IOException - if the parent directory cannot be created

See Also:

FileUtils.forceMkdirParent