JDK14/Java14源码在线阅读

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package org.graalvm.compiler.lir.phases;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.ListIterator;

import org.graalvm.compiler.lir.gen.LIRGenerationResult;

import jdk.vm.ci.code.TargetDescription;

public class LIRPhaseSuite<C> extends LIRPhase<C> {
    private List<LIRPhase<C>> phases;
    private boolean immutable;

    public LIRPhaseSuite() {
        phases = new ArrayList<>();
    }

    /**
     * Gets an unmodifiable view on the phases in this suite.
     */
    public List<LIRPhase<C>> getPhases() {
        return Collections.unmodifiableList(phases);
    }

    /**
     * Add a new phase at the beginning of this suite.
     */
    public final void prependPhase(LIRPhase<C> phase) {
        phases.add(0, phase);
    }

    /**
     * Add a new phase at the end of this suite.
     */
    public final void appendPhase(LIRPhase<C> phase) {
        phases.add(phase);
    }

    public final ListIterator<LIRPhase<C>> findPhase(Class<? extends LIRPhase<C>> phaseClass) {
        ListIterator<LIRPhase<C>> it = phases.listIterator();
        if (findNextPhase(it, phaseClass)) {
            return it;
        } else {
            return null;
        }
    }

    public final <T extends LIRPhase<C>> T findPhaseInstance(Class<T> phaseClass) {
        ListIterator<LIRPhase<C>> it = phases.listIterator();
        while (it.hasNext()) {
            LIRPhase<C> phase = it.next();
            if (phaseClass.isInstance(phase)) {
                return phaseClass.cast(phase);
            }
        }
        return null;
    }

    public static <C> boolean findNextPhase(ListIterator<LIRPhase<C>> it, Class<? extends LIRPhase<C>> phaseClass) {
        while (it.hasNext()) {
            LIRPhase<C> phase = it.next();
            if (phaseClass.isInstance(phase)) {
                return true;
            }
        }
        return false;
    }

    @Override
    protected final void run(TargetDescription target, LIRGenerationResult lirGenRes, C context) {
        for (LIRPhase<C> phase : phases) {
            phase.apply(target, lirGenRes, context);
        }
    }

    public LIRPhaseSuite<C> copy() {

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