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 23 * questions. 24 */ 25 26package sun.tools.jstat; 27 28import java.text.*; 29import 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 */ 39public 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 } 78 79 public String getRow() { 80 return row.toString(); 81 } 82} 83