| /* |
| * 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.MonitorException; |
| |
| /** |
| * A class implementing the Closure interface which is used to resolve |
| * all the symbols in the expressions contained in ColumnFormat objects. |
| * |
| * @author Brian Doherty |
| * @since 1.5 |
| */ |
| public class SymbolResolutionClosure implements Closure { |
| private static final boolean debug = |
| Boolean.getBoolean("SymbolResolutionClosure.debug"); |
| |
| private ExpressionEvaluator ee; |
| |
| public SymbolResolutionClosure(ExpressionEvaluator ee) { |
| this.ee = ee; |
| } |
| |
| public void visit(Object o, boolean hasNext) throws MonitorException { |
| if (! (o instanceof ColumnFormat)) { |
| return; |
| } |
| |
| ColumnFormat c = (ColumnFormat)o; |
| Expression e = c.getExpression(); |
| String previous = e.toString(); |
| e = (Expression)ee.evaluate(e); |
| if (debug) { |
| System.out.print("Expression: " + previous + " resolved to " |
| + e.toString()); |
| } |
| c.setExpression(e); |
| } |
| } |