本文整理了Java中cascading.util.Util.invokeInstanceMethod()方法的一些代码示例，展示了Util.invokeInstanceMethod()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Util.invokeInstanceMethod()方法的具体详情如下：
包路径：cascading.util.Util
类名称：Util
方法名：invokeInstanceMethod

Util.invokeInstanceMethod介绍

暂无

代码示例

代码示例来源：origin: cwensel/cascading

public void writeDOT( String filename )
 {
 Util.invokeInstanceMethod( graph, "writeDOT", new Object[]{filename}, new Class[]{String.class} );
 }
}

代码示例来源：origin: cwensel/cascading

public static Object invokeInstanceMethodSafe( Object target, String methodName, Object[] parameters, Class[] parameterTypes )
 {
 try
  {
  return invokeInstanceMethod( target, methodName, parameters, parameterTypes );
  }
 catch( Exception exception )
  {
  return null;
  }
 }

代码示例来源：origin: cwensel/cascading

public static <C> C copyConfiguration( C parent )
 {
 if( parent == null )
  throw new IllegalArgumentException( "parent may not be null" );
 if( !( parent instanceof Configuration ) )
  throw new IllegalArgumentException( "parent must be of type Configuration" );
 Configuration conf = (Configuration) parent;
 // see https://github.com/Cascading/cascading/pull/21
 // The JobConf(JobConf) constructor causes derived JobConfs to share Credentials. We want to avoid this, in
 // case those Credentials are mutated later on down the road (which they will be, during job submission, in
 // separate threads!). Using the JobConf(Configuration) constructor avoids Credentials-sharing.
 Configuration configurationCopy = new Configuration( conf );
 Configuration copiedConf = callCopyConstructor( parent.getClass(), configurationCopy );
 if( Util.hasInstanceMethod( parent, "getCredentials", null ) )
  {
  Object result = invokeInstanceMethod( parent, "getCredentials", null, null );
  Object credentials = invokeInstanceMethod( copiedConf, "getCredentials", null, null );
  invokeInstanceMethod( credentials, "addAll", new Object[]{result}, new Class[]{credentials.getClass()} );
  }
 return (C) copiedConf;
 }

代码示例来源：origin: cascading/cascading-hadoop2-io

public static <C> C copyConfiguration( C parent )
 {
 if( parent == null )
  throw new IllegalArgumentException( "parent may not be null" );
 if( !( parent instanceof Configuration ) )
  throw new IllegalArgumentException( "parent must be of type Configuration" );
 Configuration conf = (Configuration) parent;
 // see https://github.com/Cascading/cascading/pull/21
 // The JobConf(JobConf) constructor causes derived JobConfs to share Credentials. We want to avoid this, in
 // case those Credentials are mutated later on down the road (which they will be, during job submission, in
 // separate threads!). Using the JobConf(Configuration) constructor avoids Credentials-sharing.
 Configuration configurationCopy = new Configuration( conf );
 Configuration copiedConf = callCopyConstructor( parent.getClass(), configurationCopy );
 if( Util.hasInstanceMethod( parent, "getCredentials", null ) )
  {
  Object result = invokeInstanceMethod( parent, "getCredentials", null, null );
  Object credentials = invokeInstanceMethod( copiedConf, "getCredentials", null, null );
  invokeInstanceMethod( credentials, "addAll", new Object[]{result}, new Class[]{credentials.getClass()} );
  }
 return (C) copiedConf;
 }

代码示例来源：origin: cwensel/cascading

public static String setLog4jLevel( String logger, String level )
 {
 // removing logj4 dependency
 // org.apache.log4j.Logger.getLogger( logger[ 0 ] ).setLevel( org.apache.log4j.Level.toLevel( logger[ 1 ] ) );
 Object loggerObject = Util.invokeStaticMethod( "org.apache.log4j.Logger", "getLogger",
  new Object[]{logger}, new Class[]{String.class} );
 Object levelObject = null;
 if( level != null )
  levelObject = Util.invokeStaticMethod( "org.apache.log4j.Level", "toLevel",
   new Object[]{level}, new Class[]{String.class} );
 Object oldLevel = Util.invokeInstanceMethod( loggerObject, "getLevel",
  new Object[]{}, new Class[]{} );
 Util.invokeInstanceMethod( loggerObject, "setLevel",
  new Object[]{levelObject}, new Class[]{Util.loadClass( "org.apache.log4j.Level" )} );
 if( oldLevel == null )
  return null;
 return oldLevel.toString();
 }

代码示例来源：origin: cwensel/cascading

@Test
public void testSetLogLevel()
 {
 Configuration jobConf = new Configuration();
 jobConf.set( "log4j.logger", "cascading=DEBUG" );
 HadoopUtil.initLog4j( jobConf );
 Object loggerObject = Util.invokeStaticMethod( "org.apache.log4j.Logger", "getLogger",
  new Object[]{"cascading"}, new Class[]{String.class} );
 Object levelObject = Util.invokeStaticMethod( "org.apache.log4j.Level", "toLevel",
  new Object[]{"DEBUG"}, new Class[]{String.class} );
 Object returnedLevel = Util.invokeInstanceMethod( loggerObject, "getLevel",
  new Object[]{}, new Class[]{} );
 assertEquals( levelObject, returnedLevel );
 }
}

代码示例来源：origin: cascading/cascading-hadoop2-common

@Test
public void testSetLogLevel()
 {
 Configuration jobConf = new Configuration();
 jobConf.set( "log4j.logger", "cascading=DEBUG" );
 HadoopUtil.initLog4j( jobConf );
 Object loggerObject = Util.invokeStaticMethod( "org.apache.log4j.Logger", "getLogger",
  new Object[]{"cascading"}, new Class[]{String.class} );
 Object levelObject = Util.invokeStaticMethod( "org.apache.log4j.Level", "toLevel",
  new Object[]{"DEBUG"}, new Class[]{String.class} );
 Object returnedLevel = Util.invokeInstanceMethod( loggerObject, "getLevel",
  new Object[]{}, new Class[]{} );
 assertEquals( levelObject, returnedLevel );
 }
}