| J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2004 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package sun.tools.jstat; |
| 27 | |
| 28 | import java.text.*; |
| 29 | import sun.jvmstat.monitor.*; |
| 30 | |
| 31 | /** |
| 32 | * A class implementing the Closure interface for iterating over the |
| 33 | * specified columns of data and generating the columnized string of |
| 34 | * data representing a row of output for the form. |
| 35 | * |
| 36 | * @author Brian Doherty |
| 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 | s = df.format(scaledValue); |
| 66 | } |
| 67 | |
| 68 | c.setPreviousValue(value); |
| 69 | s = c.getAlignment().align(s, c.getWidth()); |
| 70 | row.append(s); |
| 71 | if (hasNext) { |
| 72 | row.append(" "); |
| 73 | } |
| 74 | } |
| 75 | |
| 76 | public String getRow() { |
| 77 | return row.toString(); |
| 78 | } |
| 79 | } |