/* * 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 sun.jvmstat.monitor.MonitorException;/** * A class implementing the Closure interface that visits the nodes of * the nodes of a ColumFormat object and computes the header string for * the columns of data. * * @author Brian Doherty * @since 1.5 */public class HeaderClosure implements Closure { private static final char ALIGN_CHAR = '^'; private StringBuilder header = new StringBuilder(); /* * visit an object to perform some operation. In this case, the * object is a ColumnFormat we are building the header string. */ public void visit(Object o, boolean hasNext) throws MonitorException { if (! (o instanceof ColumnFormat)) { return; } ColumnFormat c = (ColumnFormat)o; String h = c.getHeader(); // check for special alignment character if (h.indexOf(ALIGN_CHAR) >= 0) { int len = h.length(); if ((h.charAt(0) == ALIGN_CHAR) && (h.charAt(len-1) == ALIGN_CHAR)) { // ^<header>^ case - center alignment c.setWidth(Math.max(c.getWidth(), Math.max(c.getFormat().length(), len-2))); h = h.substring(1, len-1); h = Alignment.CENTER.align(h, c.getWidth()); } else if (h.charAt(0) == ALIGN_CHAR) { // ^<header> case - left alignment c.setWidth(Math.max(c.getWidth(), Math.max(c.getFormat().length(), len-1))); h = h.substring(1, len); h = Alignment.LEFT.align(h, c.getWidth()); } else if (h.charAt(len-1) == ALIGN_CHAR) { // <header>^ case - right alignment c.setWidth(Math.max(c.getWidth(), Math.max(c.getFormat().length(), len-1))); h = h.substring(0, len-1); h = Alignment.RIGHT.align(h, c.getWidth()); } else { // an internal alignment character - ignore } } else { // User has provided their own padding for alignment purposes } header.append(h); if (hasNext) { header.append(" "); } } /* * get the header string. */ public String getHeader() { return header.toString(); }}
/*
* 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 sun.jvmstat.monitor.MonitorException;
/**
* A class implementing the Closure interface that visits the nodes of
* the nodes of a ColumFormat object and computes the header string for
* the columns of data.
*
* @author Brian Doherty
* @since 1.5
*/
public class HeaderClosure implements Closure {
private static final char ALIGN_CHAR = '^';
private StringBuilder header = new StringBuilder();
/*
* visit an object to perform some operation. In this case, the
* object is a ColumnFormat we are building the header string.
*/
public void visit(Object o, boolean hasNext) throws MonitorException {
if (! (o instanceof ColumnFormat)) {
return;
}
ColumnFormat c = (ColumnFormat)o;
String h = c.getHeader();
// check for special alignment character
if (h.indexOf(ALIGN_CHAR) >= 0) {
int len = h.length();
if ((h.charAt(0) == ALIGN_CHAR)
&& (h.charAt(len-1) == ALIGN_CHAR)) {
// ^<header>^ case - center alignment
c.setWidth(Math.max(c.getWidth(),
Math.max(c.getFormat().length(), len-2)));
h = h.substring(1, len-1);
h = Alignment.CENTER.align(h, c.getWidth());
} else if (h.charAt(0) == ALIGN_CHAR) {
// ^<header> case - left alignment
c.setWidth(Math.max(c.getWidth(),
Math.max(c.getFormat().length(), len-1)));
h = h.substring(1, len);
h = Alignment.LEFT.align(h, c.getWidth());
} else if (h.charAt(len-1) == ALIGN_CHAR) {
// <header>^ case - right alignment
c.setWidth(Math.max(c.getWidth(),
Math.max(c.getFormat().length(), len-1)));
h = h.substring(0, len-1);
h = Alignment.RIGHT.align(h, c.getWidth());
} else {
// an internal alignment character - ignore
}
} else {
// User has provided their own padding for alignment purposes
}
header.append(h);
if (hasNext) {
header.append(" ");
}
}
/*
* get the header string.
*/
public String getHeader() {
return header.toString();
}
}