IntrospectionUtils (Tomcat API Documentation)
Keywords: org.apache.tomcat.util.IntrospectionUtils class

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## org.apache.tomcat.util
Class IntrospectionUtils

    java.lang.Object
      org.apache.tomcat.util.IntrospectionUtils

public final class IntrospectionUtils
extends java.lang.Object

Utils for introspection and reflection

Nested Class Summary
`static interface` | `IntrospectionUtils.AttributeHolder`
`static interface` | `IntrospectionUtils.PropertySource`

Field Summary
`static java.lang.String` | `PATH_SEPARATOR`

Constructor Summary
`IntrospectionUtils()`

Method Summary
`static void` | `addJarsFromClassPath(java.util.Vector jars, java.lang.String cp)` add elements from the classpath cp to a Vector jars as file URLs (We use Vector for JDK 1.1 compat).
`static void` | `addToClassPath(java.util.Vector cpV, java.lang.String dir)` Add all the jar files in a dir to the classpath, represented as a Vector of URLs.
`static void` | `addToolsJar(java.util.Vector v)`
`static void` | `callMain(java.lang.Class c, java.lang.String[] args)`
`static java.lang.Object` | `callMethod0(java.lang.Object target, java.lang.String methodN)`
`static java.lang.Object` | `callMethod1(java.lang.Object target, java.lang.String methodN, java.lang.Object param1, java.lang.String typeParam1, java.lang.ClassLoader cl)`
`static java.lang.Object` | `callMethodN(java.lang.Object target, java.lang.String methodN, java.lang.Object[] params, java.lang.Class[] typeParams)`
`static java.lang.String` | `capitalize(java.lang.String name)` Reverse of Introspector.decapitalize
`static java.lang.String` | `classPathAdd(java.net.URL[] urls, java.lang.String cp)` Adds classpath entries from a vector of URL's to the "tc_path_add" System property.
`static void` | `displayClassPath(java.lang.String msg, java.net.URL[] cp)` Debug method, display the classpath
`static void` | `execute(java.lang.Object proxy, java.lang.String method)` Call execute() - any ant-like task should work
`static java.lang.String[]` | `findBooleanSetters(java.lang.Class c)`
`static java.lang.reflect.Method` | `findMethod(java.lang.Class c, java.lang.String name, java.lang.Class[] params)`
`static java.lang.reflect.Method[]` | `findMethods(java.lang.Class c)`
`static java.lang.String[]` | `findVoidSetters(java.lang.Class c)`
`static java.lang.Object` | `getAttribute(java.lang.Object proxy, java.lang.String n)` Call void getAttribute( String )
`static java.net.URL[]` | `getClassPath(java.lang.String dir, java.lang.String cpath, java.lang.String cpathProp, boolean addTools)` Construct a URL classpath from files in a directory, a cpath property, and tools.jar.
`static java.net.URL[]` | `getClassPath(java.util.Vector v)` Return a URL[] that can be used to construct a class loader
`static java.lang.String[]` | `getFilesByExt(java.lang.String ld, java.lang.String ext)` Return all files with a given extension in a dir
`static java.lang.Object` | `getProperty(java.lang.Object o, java.lang.String name)`
`static java.net.URL` | `getURL(java.lang.String base, java.lang.String file)` Construct a file url from a file, using a base dir
`static java.lang.ClassLoader` | `getURLClassLoader(java.net.URL[] urls, java.lang.ClassLoader parent)` Construct a URLClassLoader.
`static java.lang.String` | `guessInstall(java.lang.String installSysProp, java.lang.String homeSysProp, java.lang.String jarName)`
`static java.lang.String` | `guessInstall(java.lang.String installSysProp, java.lang.String homeSysProp, java.lang.String jarName, java.lang.String classFile)` Guess a product install/home by analyzing the class path.
`static boolean` | `hasHook(java.lang.Object obj, java.lang.String methodN)` Test if the object implements a particular method
`static boolean` | `processArgs(java.lang.Object proxy, java.lang.String[] args)`
`static boolean` | `processArgs(java.lang.Object proxy, java.lang.String[] args, java.lang.String[] args0, java.lang.String[] args1, java.util.Hashtable aliases)`
`static java.lang.String` | `replaceProperties(java.lang.String value, java.util.Hashtable staticProp, IntrospectionUtils.PropertySource[] dynamicProp)` Replace ${NAME} with the property value
`static java.lang.String` | `replaceProperties(java.lang.String value, java.lang.Object getter)` Replace ${NAME} with the property value
`static void` | `setAttribute(java.lang.Object proxy, java.lang.String n, java.lang.Object v)` Call void setAttribute( String ,Object )
`static void` | `setProperty(java.lang.Object o, java.lang.String name)`
`static void` | `setProperty(java.lang.Object o, java.lang.String name, java.lang.String value)` Find a method with the right name If found, call the method ( if param is int or boolean we'll convert value to the right type before) - that means you can have setDebug(1).
`static java.lang.String` | `unCapitalize(java.lang.String name)`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### PATH_SEPARATOR

    public static java.lang.String PATH_SEPARATOR

Constructor Detail

### IntrospectionUtils

    public IntrospectionUtils()

Method Detail

### execute

    public static void execute(java.lang.Object proxy,
                               java.lang.String method)
                        throws java.lang.Exception

  Call execute() - any ant-like task should work

  Throws:
    `java.lang.Exception`

### setAttribute

    public static void setAttribute(java.lang.Object proxy,
                                    java.lang.String n,
                                    java.lang.Object v)
                             throws java.lang.Exception

  Call void setAttribute( String ,Object )

  Throws:
    `java.lang.Exception`

### getAttribute

    public static java.lang.Object getAttribute(java.lang.Object proxy,
                                                java.lang.String n)
                                         throws java.lang.Exception

  Call void getAttribute( String )

  Throws:
    `java.lang.Exception`

### getURLClassLoader

    public static java.lang.ClassLoader getURLClassLoader(java.net.URL[] urls,
                                                          java.lang.ClassLoader parent)

  Construct a URLClassLoader. Will compile and work in JDK1.1 too.

### guessInstall

    public static java.lang.String guessInstall(java.lang.String installSysProp,
                                                java.lang.String homeSysProp,
                                                java.lang.String jarName)

### guessInstall

    public static java.lang.String guessInstall(java.lang.String installSysProp,
                                                java.lang.String homeSysProp,
                                                java.lang.String jarName,
                                                java.lang.String classFile)

  Guess a product install/home by analyzing the class path. It works for product using the pattern: lib/executable.jar or if executable.jar is included in classpath by a shell script. ( java -jar also works ) Insures both "install" and "home" System properties are set. If either or both System properties are unset, "install" and "home" will be set to the same value. This value will be the other System property that is set, or the guessed value if neither is set.

### displayClassPath

    public static void displayClassPath(java.lang.String msg,
                                        java.net.URL[] cp)

  Debug method, display the classpath

### classPathAdd

    public static java.lang.String classPathAdd(java.net.URL[] urls,
                                                java.lang.String cp)

  Adds classpath entries from a vector of URL's to the "tc_path_add" System property. This System property lists the classpath entries common to web applications. This System property is currently used by Jasper when its JSP servlet compiles the Java file for a JSP.

### setProperty

    public static void setProperty(java.lang.Object o,
                                   java.lang.String name,
                                   java.lang.String value)

  Find a method with the right name If found, call the method ( if param is int or boolean we'll convert value to the right type before) - that means you can have setDebug(1).

### getProperty

    public static java.lang.Object getProperty(java.lang.Object o,
                                               java.lang.String name)

### setProperty

    public static void setProperty(java.lang.Object o,
                                   java.lang.String name)

### replaceProperties

    public static java.lang.String replaceProperties(java.lang.String value,
                                                     java.lang.Object getter)

  Replace ${NAME} with the property value

### replaceProperties

    public static java.lang.String replaceProperties(java.lang.String value,
                                                     java.util.Hashtable staticProp,
                                                     IntrospectionUtils.PropertySource[] dynamicProp)

  Replace ${NAME} with the property value

### capitalize

    public static java.lang.String capitalize(java.lang.String name)

  Reverse of Introspector.decapitalize

### unCapitalize

    public static java.lang.String unCapitalize(java.lang.String name)

### addToClassPath

    public static void addToClassPath(java.util.Vector cpV,
                                      java.lang.String dir)

  Add all the jar files in a dir to the classpath, represented as a Vector of URLs.

### addToolsJar

    public static void addToolsJar(java.util.Vector v)

### getFilesByExt

    public static java.lang.String[] getFilesByExt(java.lang.String ld,
                                                   java.lang.String ext)

  Return all files with a given extension in a dir

### getURL

    public static java.net.URL getURL(java.lang.String base,
                                      java.lang.String file)

  Construct a file url from a file, using a base dir

### addJarsFromClassPath

    public static void addJarsFromClassPath(java.util.Vector jars,
                                            java.lang.String cp)
                                     throws java.io.IOException,
                                            java.net.MalformedURLException

  add elements from the classpath cp to a Vector jars as file URLs (We use Vector for JDK 1.1 compat).

  Returns:
    a Vector of URLs.
  Throws:
    `java.io.IOException`
    `java.net.MalformedURLException`

### getClassPath

    public static java.net.URL[] getClassPath(java.util.Vector v)

  Return a URL[] that can be used to construct a class loader

### getClassPath

    public static java.net.URL[] getClassPath(java.lang.String dir,
                                              java.lang.String cpath,
                                              java.lang.String cpathProp,
                                              boolean addTools)
                                       throws java.io.IOException,
                                              java.net.MalformedURLException

  Construct a URL classpath from files in a directory, a cpath property, and tools.jar.

  Throws:
    `java.io.IOException`
    `java.net.MalformedURLException`

### processArgs

    public static boolean processArgs(java.lang.Object proxy,
                                      java.lang.String[] args)
                               throws java.lang.Exception

  Throws:
    `java.lang.Exception`

### processArgs

    public static boolean processArgs(java.lang.Object proxy,
                                      java.lang.String[] args,
                                      java.lang.String[] args0,
                                      java.lang.String[] args1,
                                      java.util.Hashtable aliases)
                               throws java.lang.Exception

  Throws:
    `java.lang.Exception`

### findVoidSetters

    public static java.lang.String[] findVoidSetters(java.lang.Class c)

### findBooleanSetters

    public static java.lang.String[] findBooleanSetters(java.lang.Class c)

### findMethods

    public static java.lang.reflect.Method[] findMethods(java.lang.Class c)

### findMethod

    public static java.lang.reflect.Method findMethod(java.lang.Class c,
                                                      java.lang.String name,
                                                      java.lang.Class[] params)

### hasHook

    public static boolean hasHook(java.lang.Object obj,
                                  java.lang.String methodN)

  Test if the object implements a particular method

### callMain

    public static void callMain(java.lang.Class c,
                                java.lang.String[] args)
                         throws java.lang.Exception

  Throws:
    `java.lang.Exception`

### callMethod1

    public static java.lang.Object callMethod1(java.lang.Object target,
                                               java.lang.String methodN,
                                               java.lang.Object param1,
                                               java.lang.String typeParam1,
                                               java.lang.ClassLoader cl)
                                        throws java.lang.Exception

  Throws:
    `java.lang.Exception`

### callMethod0

    public static java.lang.Object callMethod0(java.lang.Object target,
                                               java.lang.String methodN)
                                        throws java.lang.Exception

  Throws:
    `java.lang.Exception`

### callMethodN

    public static java.lang.Object callMethodN(java.lang.Object target,
                                               java.lang.String methodN,
                                               java.lang.Object[] params,
                                               java.lang.Class[] typeParams)
                                        throws java.lang.Exception

  Throws:
    `java.lang.Exception`

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