package org.kuali.common.devops.jenkins.scan.function;
   
   import static org.apache.commons.io.FileUtils.readFileToString;
   import static org.kuali.common.util.Encodings.UTF8;
   import static org.kuali.common.util.base.Exceptions.illegalState;
   import static org.kuali.common.util.base.Precondition.checkNotBlank;
   import static org.kuali.common.util.base.Precondition.checkNotNull;
   
   import java.io.File;
  import java.io.IOException;
  
  import com.google.common.base.Function;
  
  public final class ReadFileFunction implements Function<File, String> {
  
  	public static final ReadFileFunction READ_UTF8_FILE_FUNCTION = new ReadFileFunction();
  
  	public ReadFileFunction() {
  		this(UTF8);
  	}
  
  	public ReadFileFunction(String encoding) {
  		this.encoding = checkNotBlank(encoding, "encoding");
  	}
  
  	private final String encoding;
  
  	@Override
  	public String apply(File file) {
  		try {
  			return readFileToString(checkNotNull(file, "file"), encoding);
  		} catch (IOException e) {
  			throw illegalState(e);
  		}
  	}
  
  	public String getEncoding() {
  		return encoding;
  	}
  }