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package org.jruby.runtime.profile.builtin;

import org.jruby.Ruby;
import org.jruby.RubyInstanceConfig;
import org.jruby.common.IRubyWarnings;
import org.jruby.common.RubyWarnings;
import org.jruby.internal.runtime.methods.DynamicMethod;

import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;

/**
 * This is a collection af all methods which will be profiled.
 * Current it's just a wrapper for a {@link java.util.concurrent.ConcurrentMap},
 * but the implementation can be changed in the future without changing the interface.
 *
 * @author Andre Kullmann
 */
public class ProfiledMethods {

    private final ConcurrentMap<Long,ProfiledMethod> methods;

    private final Ruby runtime;

    public ProfiledMethods( final Ruby runtime ) {

        if( runtime == null )
            throw new IllegalArgumentException( "Given runtime must not be null." );

        this.runtime = runtime;
        // TODO is 10000 a good value ?
        this.methods = new ConcurrentHashMap<Long,ProfiledMethod>(10000);
    }

    private Ruby getRuntime() {
        return runtime;
    }

    private RubyInstanceConfig getConfig() {
        return getRuntime().getInstanceConfig();
    }

    private RubyWarnings getWarnings() {
        return getRuntime().getWarnings();
    }

    private int getProfileMaxMethods() {
        return getConfig().getProfileMaxMethods();
    }

    private ConcurrentMap<Long,ProfiledMethod> getMethods() {
        return methods;
    }

    public void addProfiledMethod( final String name, final DynamicMethod method ) {

        final long serial = method.getSerialNumber();

        if ( getMethods().size() >= getProfileMaxMethods()) {
            getWarnings().warnOnce(IRubyWarnings.ID.PROFILE_MAX_METHODS_EXCEEDED, "method count exceeds max of " + getConfig().getProfileMaxMethods() + "; no new methods will be profiled");
            return;
        }

        getMethods().putIfAbsent( serial, new ProfiledMethod(name, method) );
    }

    public ProfiledMethod getProfiledMethod( final long serial ) {

        return getMethods().get( serial );
    }
}
