| /* |
| * Copyright (c) 2004, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.tools.jstat; |
| |
| import java.text.*; |
| import sun.jvmstat.monitor.*; |
| |
| /** |
| * A class implementing the Closure interface for iterating over the |
| * specified columns of data and generating the columnized string of |
| * data representing a row of output for the form. |
| * |
| * @author Brian Doherty |
| * @since 1.5 |
| */ |
| public class RowClosure implements Closure { |
| private MonitoredVm vm; |
| private StringBuilder row = new StringBuilder(); |
| |
| public RowClosure(MonitoredVm vm) { |
| this.vm = vm; |
| } |
| |
| public void visit(Object o, boolean hasNext) throws MonitorException { |
| if (! (o instanceof ColumnFormat)) { |
| return; |
| } |
| |
| ColumnFormat c = (ColumnFormat)o; |
| String s = null; |
| |
| Expression e = c.getExpression(); |
| ExpressionEvaluator ee = new ExpressionExecuter(vm); |
| Object value = ee.evaluate(e); |
| |
| if (value instanceof String) { |
| s = (String)value; |
| } else if (value instanceof Number) { |
| double d = ((Number)value).doubleValue(); |
| double scaledValue = c.getScale().scale(d); |
| DecimalFormat df = new DecimalFormat(c.getFormat()); |
| s = df.format(scaledValue); |
| } |
| |
| c.setPreviousValue(value); |
| s = c.getAlignment().align(s, c.getWidth()); |
| row.append(s); |
| if (hasNext) { |
| row.append(" "); |
| } |
| } |
| |
| public String getRow() { |
| return row.toString(); |
| } |
| } |