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The NetCDF-Java Library is a Java interface to NetCDF files, as well as to many other types of scientific data formats.

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/*
 * Copyright (c) 1998 - 2009. University Corporation for Atmospheric Research/Unidata
 * Portions of this software were developed by the Unidata Program at the
 * University Corporation for Atmospheric Research.
 *
 * Access and use of this software shall impose the following obligations
 * and understandings on the user. The user is granted the right, without
 * any fee or cost, to use, copy, modify, alter, enhance and distribute
 * this software, and any derivative works thereof, and its supporting
 * documentation for any purpose whatsoever, provided that this entire
 * notice appears in all copies of the software, derivative works and
 * supporting documentation.  Further, UCAR requests that the user credit
 * UCAR/Unidata in any publications that result from the use of this
 * software or in any product that includes this software. The names UCAR
 * and/or Unidata, however, may not be used in any advertising or publicity
 * to endorse or promote any products or commercial entity unless specific
 * written permission is obtained from UCAR/Unidata. The user also
 * understands that UCAR/Unidata is not obligated to provide the user with
 * any support, consulting, training or assistance of any kind with regard
 * to the use, operation and performance of this software nor to provide
 * the user with any updates, revisions, new versions or "bug fixes."
 *
 * THIS SOFTWARE IS PROVIDED BY UCAR/UNIDATA "AS IS" AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL UCAR/UNIDATA BE LIABLE FOR ANY SPECIAL,
 * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
 * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
 * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
 * WITH THE ACCESS, USE OR PERFORMANCE OF THIS SOFTWARE.
 */

package ucar.nc2.util;

/**
 * Maintains indentation level for printing nested structures.
 */
public class Indent {
  private int nspaces = 0;

  private int level = 0;
  private StringBuilder blanks;
  private String indent = "";

  // nspaces = how many spaces each level adds.
  // max 100 levels
  public Indent(int nspaces) {
    this.nspaces = nspaces;
    blanks = new StringBuilder();
    for (int i = 0; i < 100 * nspaces; i++)
      blanks.append(" ");
  }

  public Indent incr() {
    level++;
    setIndentLevel(level);
    return this;
  }

  public Indent decr() {
    level--;
    setIndentLevel(level);
    return this;
  }

  public int level() {
    return level;
  }

  public String toString() {
    return indent;
  }

  public void setIndentLevel(int level) {
    this.level = level;
    if (level * nspaces >= blanks.length())
      System.out.printf("HEY setIndentLevel!%n");
    int end = Math.min(level * nspaces, blanks.length());
    indent = blanks.substring(0, end);
  }
}




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