< prev index next >

src/jdk.jcmd/share/classes/sun/tools/jstat/RowClosure.java

Print this page


   1 /*
   2  * Copyright (c) 2004, 2013, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any


  37  * @since 1.5
  38  */
  39 public class RowClosure implements Closure {
  40     private MonitoredVm vm;
  41     private StringBuilder row = new StringBuilder();
  42 
  43     public RowClosure(MonitoredVm vm) {
  44         this.vm = vm;
  45     }
  46 
  47     public void visit(Object o, boolean hasNext) throws MonitorException {
  48         if (! (o instanceof ColumnFormat)) {
  49             return;
  50         }
  51 
  52         ColumnFormat c = (ColumnFormat)o;
  53         String s = null;
  54 
  55         Expression e = c.getExpression();
  56         ExpressionEvaluator ee = new ExpressionExecuter(vm);
  57         Object value = ee.evaluate(e);
  58 
  59         if (value instanceof String) {
  60             s = (String)value;
  61         } else if (value instanceof Number) {
  62             double d = ((Number)value).doubleValue();
  63             double scaledValue = c.getScale().scale(d);
  64             DecimalFormat df = new DecimalFormat(c.getFormat());
  65             DecimalFormatSymbols syms = df.getDecimalFormatSymbols();
  66             syms.setNaN("-");
  67             df.setDecimalFormatSymbols(syms);
  68             s = df.format(scaledValue);
  69         }
  70 
  71         c.setPreviousValue(value);
  72         s = c.getAlignment().align(s, c.getWidth());
  73         row.append(s);
  74         if (hasNext) {
  75             row.append(" ");
  76         }
  77     }
   1 /*
   2  * Copyright (c) 2004, 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any


  37  * @since 1.5
  38  */
  39 public class RowClosure implements Closure {
  40     private MonitoredVm vm;
  41     private StringBuilder row = new StringBuilder();
  42 
  43     public RowClosure(MonitoredVm vm) {
  44         this.vm = vm;
  45     }
  46 
  47     public void visit(Object o, boolean hasNext) throws MonitorException {
  48         if (! (o instanceof ColumnFormat)) {
  49             return;
  50         }
  51 
  52         ColumnFormat c = (ColumnFormat)o;
  53         String s = null;
  54 
  55         Expression e = c.getExpression();
  56         ExpressionEvaluator ee = new ExpressionExecuter(vm);
  57         Object value = ee.evaluate(e, c.isForcibly());
  58 
  59         if (value instanceof String) {
  60             s = (String)value;
  61         } else if (value instanceof Number) {
  62             double d = ((Number)value).doubleValue();
  63             double scaledValue = c.getScale().scale(d);
  64             DecimalFormat df = new DecimalFormat(c.getFormat());
  65             DecimalFormatSymbols syms = df.getDecimalFormatSymbols();
  66             syms.setNaN("-");
  67             df.setDecimalFormatSymbols(syms);
  68             s = df.format(scaledValue);
  69         }
  70 
  71         c.setPreviousValue(value);
  72         s = c.getAlignment().align(s, c.getWidth());
  73         row.append(s);
  74         if (hasNext) {
  75             row.append(" ");
  76         }
  77     }
< prev index next >