org.adoptopenjdk.jitwatch.jarscan.invokecount.MethodCountMap Maven / Gradle / Ivy

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A Maven plugin that scans the project artifact and its dependencies for methods that cannot be inlined by the JIT compiler. It uses the JarScan utility from the JITWatch project to do that. See https://github.com/AdoptOpenJDK/jitwatch .

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/*
 * Copyright (c) 2013-2016 Chris Newland.
 * Licensed under https://github.com/AdoptOpenJDK/jitwatch/blob/master/LICENSE-BSD
 * Instructions: https://github.com/AdoptOpenJDK/jitwatch/wiki
 */
package org.adoptopenjdk.jitwatch.jarscan.invokecount;

import static org.adoptopenjdk.jitwatch.core.JITWatchConstants.C_COMMA;
import static org.adoptopenjdk.jitwatch.core.JITWatchConstants.C_DOUBLE_QUOTE;
import static org.adoptopenjdk.jitwatch.core.JITWatchConstants.S_NEWLINE;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.Map;
import java.util.TreeMap;

import org.adoptopenjdk.jitwatch.model.bytecode.Opcode;

public class MethodCountMap
{
	private Map methodCountMap = new TreeMap<>();
	
	public void count(String method)
	{
		Integer count = methodCountMap.get(method);
		
		if (count == null)
		{
			count = new Integer(1);
		}
		else
		{
			count++;
		}
		
		methodCountMap.put(method, count);
	}
	
	public String toString(Opcode prefix, int limitPerInvoke)
	{
		StringBuilder builder = new StringBuilder();
		
		List> sortedList = new ArrayList<>(methodCountMap.entrySet());

		Collections.sort(sortedList, new Comparator>()
		{
			@Override
			public int compare(Map.Entry o1, Map.Entry o2)
			{
				return o2.getValue().compareTo(o1.getValue());
			}
		});
		
		int outputCount = 0;

		for (Map.Entry entry : sortedList)
		{
			String methodName = entry.getKey();
			Integer count = entry.getValue();
			
			builder.append(C_DOUBLE_QUOTE).append(prefix.getMnemonic()).append(C_DOUBLE_QUOTE).append(C_COMMA);
			builder.append(C_DOUBLE_QUOTE).append(methodName).append(C_DOUBLE_QUOTE).append(C_COMMA);
			builder.append(count).append(S_NEWLINE);
			
			outputCount++;
			
			if (limitPerInvoke != 0 && outputCount == limitPerInvoke)
			{
				break;
			}
		}
				
		return builder.toString();
	}
}