diff -r fd16c54261b3 -r 90ce3da70b43 jdk/src/share/classes/sun/tools/jstat/RowClosure.java --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/jdk/src/share/classes/sun/tools/jstat/RowClosure.java Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,79 @@ +/* + * Copyright 2004 Sun Microsystems, Inc. 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. Sun designates this + * particular file as subject to the "Classpath" exception as provided + * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.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(); + } +}