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/*
* This file is part of spark.
*
* Copyright (c) lucko (Luck) <luck@lucko.me>
* Copyright (c) contributors
*
* This program 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.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
package me.lucko.spark.common.sampler.node;
import me.lucko.spark.common.util.MethodDisambiguator;
import java.util.Objects;
/**
* Function to determine if {@link StackTraceNode}s should be merged.
*/
public final class MergeMode {
public static MergeMode sameMethod(MethodDisambiguator methodDisambiguator) {
return new MergeMode(methodDisambiguator, false);
}
public static MergeMode separateParentCalls(MethodDisambiguator methodDisambiguator) {
return new MergeMode(methodDisambiguator, true);
}
private final MethodDisambiguator methodDisambiguator;
private final boolean separateParentCalls;
MergeMode(MethodDisambiguator methodDisambiguator, boolean separateParentCalls) {
this.methodDisambiguator = methodDisambiguator;
this.separateParentCalls = separateParentCalls;
}
public MethodDisambiguator getMethodDisambiguator() {
return this.methodDisambiguator;
}
public boolean separateParentCalls() {
return this.separateParentCalls;
}
/**
* Test if two stack trace nodes should be considered the same and merged.
*
* @param n1 the first node
* @param n2 the second node
* @return if the nodes should be merged
*/
public boolean shouldMerge(StackTraceNode n1, StackTraceNode n2) {
// are the class names the same?
if (!n1.getClassName().equals(n2.getClassName())) {
return false;
}
// are the method names the same?
if (!n1.getMethodName().equals(n2.getMethodName())) {
return false;
}
// is the parent line the same? (did the same line of code call this method?)
if (this.separateParentCalls && n1.getParentLineNumber() != n2.getParentLineNumber()) {
return false;
}
// are the method descriptions the same? (is it the same method?)
String desc1 = this.methodDisambiguator.disambiguate(n1).map(MethodDisambiguator.MethodDescription::getDesc).orElse(null);
String desc2 = this.methodDisambiguator.disambiguate(n2).map(MethodDisambiguator.MethodDescription::getDesc).orElse(null);
if (desc1 == null && desc2 == null) {
return true;
}
return Objects.equals(desc1, desc2);
}
}
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