org.slf4j.impl.OutputChoice Maven / Gradle / Ivy
package org.slf4j.impl;
import java.io.PrintStream;
/**
* This class encapsulates the user's choice of output target.
*
* @author Ceki Gülcü
*
*/
class OutputChoice {
enum OutputChoiceType {
SYS_OUT, CACHED_SYS_OUT, SYS_ERR, CACHED_SYS_ERR, FILE;
}
final OutputChoiceType outputChoiceType;
final PrintStream targetPrintStream;
OutputChoice(OutputChoiceType outputChoiceType) {
if (outputChoiceType == OutputChoiceType.FILE) {
throw new IllegalArgumentException();
}
this.outputChoiceType = outputChoiceType;
if (outputChoiceType == OutputChoiceType.CACHED_SYS_OUT) {
this.targetPrintStream = System.out;
} else if (outputChoiceType == OutputChoiceType.CACHED_SYS_ERR) {
this.targetPrintStream = System.err;
} else {
this.targetPrintStream = null;
}
}
OutputChoice(PrintStream printStream) {
this.outputChoiceType = OutputChoiceType.FILE;
this.targetPrintStream = printStream;
}
PrintStream getTargetPrintStream() {
switch (outputChoiceType) {
case SYS_OUT:
return System.out;
case SYS_ERR:
return System.err;
case CACHED_SYS_ERR:
case CACHED_SYS_OUT:
case FILE:
return targetPrintStream;
default:
throw new IllegalArgumentException();
}
}
}