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package org.graalvm.polyglot;

import org.graalvm.options.OptionDescriptors;
import org.graalvm.polyglot.impl.AbstractPolyglotImpl.AbstractInstrumentImpl;


A handle for an instrument installed in an engine. The instrument is usable from other threads. The handle provides access to the metadata of the instrument and allows to lookup instrument specific services. 

All methods here, as well as instrumentation services in general, can be used safely from any
thread.

See Also:
Since:19.0
/**
 * A handle for an <em>instrument</em> installed in an {@link Engine engine}. The instrument is
 * usable from other threads. The handle provides access to the metadata of the instrument and
 * allows to {@link #lookup(Class) lookup} instrument specific services.
 * <p>
 * All methods here, as well as instrumentation services in general, can be used safely from any
 * thread.
 *
 * @see Engine#getInstruments()
 * @since 19.0
 */
public final class Instrument {

    final AbstractInstrumentImpl impl;

    Instrument(AbstractInstrumentImpl impl) {
        this.impl = impl;
    }

    
Gets the ID clients can use to acquire this instrument.

Returns:the unique ID for this instrument.
Since:19.0
/**
     * Gets the ID clients can use to acquire this instrument.
     *
     * @return the unique ID for this instrument.
     * @since 19.0
     */
    public String getId() {
        return impl.getId();
    }

    
Gets a human-readable name for this instrument.

Returns:the user-friendly name for this instrument.
Since:19.0
/**
     * Gets a human-readable name for this instrument.
     *
     * @return the user-friendly name for this instrument.
     * @since 19.0
     */
    public String getName() {
        return impl.getName();
    }

    
Gets the options available for this instrument.

Returns:the options as OptionDescriptors.
Since:19.0
/**
     * Gets the options available for this instrument.
     *
     * @return the options as {@link OptionDescriptors}.
     * @since 19.0
     */
    public OptionDescriptors getOptions() {
        return impl.getOptions();
    }

    
Gets the version of this instrument.

Returns:the version of this instrument.
Since:19.0
/**
     * Gets the version of this instrument.
     *
     * @return the version of this instrument.
     * @since 19.0
     */
    public String getVersion() {
        return impl.getVersion();
    }

    
Looks up an additional internal service that is provided by this instrument using a Java
type. Note that the services returned by this method are implementation specific and subject
to change without notice.

Params:
  • type – class of the service that is being requested.
Type parameters:
  • <T> – the type of the internal service.
Returns:instance of requested type, null if no such service is available.
Since:19.0
/**
     * Looks up an additional internal service that is provided by this instrument using a Java
     * type. Note that the services returned by this method are implementation specific and subject
     * to change without notice.
     *
     * @param <T> the type of the internal service.
     * @param type class of the service that is being requested.
     * @return instance of requested type, <code>null</code> if no such service is available.
     * @since 19.0
     */
    public <T> T lookup(Class<T> type) {
        return impl.lookup(type);
    }

}