/*
This file is part of mjprof.
mjprof is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
mjprof 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 for more details.
You should have received a copy of the GNU General Public License
along with mjprof. If not, see <http://www.gnu.org/licenses/>.
*/
package com.performizeit.mjprof.plugins.mappers.singlethread;
import com.performizeit.mjprof.api.Plugin;
import com.performizeit.mjprof.model.Profile;
import com.performizeit.mjprof.model.ProfileNodeFilter;
import com.performizeit.mjprof.model.SFNode;
import com.performizeit.mjprof.api.Param;
import com.performizeit.mjprof.parser.ThreadInfo;
@Plugin(name = "top", params = {@Param(type = int.class)},
description = "Returns at most n top stack frames of the stack")
public class StackTop extends SingleThreadMapperBase {
private final int count;
public StackTop(int count) {
this.count = count;
}
@Override
public ThreadInfo map(ThreadInfo stck) {
Profile p = (Profile) stck.getVal("stack");
p.filter(new ProfileNodeFilter() {
@Override
public boolean accept(SFNode node, int level, Object context) {
int depthBelow = node.depthBelow();
return depthBelow < count;
}
}, null);
return stck;
}
}