org.elasticsearch.painless.node.ILambda Maven / Gradle / Ivy

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 * Licensed to Elasticsearch under one or more contributor
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 * ownership. Elasticsearch licenses this file to you under
 * the Apache License, Version 2.0 (the "License"); you may
 * not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
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 * KIND, either express or implied.  See the License for the
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package org.elasticsearch.painless.node;

/** 
 * Interface for lambda/method reference nodes. They need special handling by LDefCall.
 * 
 * This is because they know nothing about the target interface, and can only push
 * all their captures onto the stack and defer everything until link-time.
 */
interface ILambda {

    /** Returns reference to resolve at link-time */
    String getPointer();

    /** Returns the types of captured parameters. Can be empty */
    org.objectweb.asm.Type[] getCaptures();

    /** Returns the number of captured parameters */
    default int getCaptureCount() {
        return getCaptures().length;
    }
}