/*
 * Copyright 2000-2017 JetBrains s.r.o.
 *
 * Licensed 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 "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.intellij.debugger.streams.trace.impl;

import com.intellij.debugger.streams.trace.NextAwareState;
import com.intellij.debugger.streams.trace.TraceElement;
import com.intellij.debugger.streams.wrapper.StreamCall;
import org.jetbrains.annotations.NotNull;

import java.util.Collections;
import java.util.List;
import java.util.Map;

/**
 * @author Vitaliy.Bibaev
 */
public class ProducerStateImpl extends StateBase implements NextAwareState {
  private final StreamCall myNextCall;
  private final Map<TraceElement, List<TraceElement>> myToNext;

  public ProducerStateImpl(@NotNull List<TraceElement> elements,
                           @NotNull StreamCall nextCall,
                           @NotNull Map<TraceElement, List<TraceElement>> toNextMapping) {
    super(elements);
    myNextCall = nextCall;
    myToNext = toNextMapping;
  }

  @NotNull
  @Override
  public StreamCall getNextCall() {
    return myNextCall;
  }

  @NotNull
  @Override
  public List<TraceElement> getNextValues(@NotNull TraceElement value) {
    return myToNext.getOrDefault(value, Collections.emptyList());
  }
}

@@ -747,28 +747,152 @@
 s.trace.
-TraceElement
+PrevAwareState;%0Aimport com.intellij.debugger.streams.trace.TraceElement;%0Aimport com.intellij.debugger.streams.wrapper.ProducerStreamCall
 ;%0Aimport
@@ -1169,16 +1169,32 @@
 areState
+, PrevAwareState
  %7B%0A  pri
@@ -1227,16 +1227,67 @@
 xtCall;%0A
+  private final ProducerStreamCall myProducerCall;%0A
   privat
@@ -1345,23 +1345,16 @@
 ext;%0A%0A  
-public 
 Producer
@@ -1400,32 +1400,87 @@
 lements,%0A       
+             @NotNull ProducerStreamCall producerCall,%0A
                 
@@ -1509,31 +1509,24 @@
 l nextCall,%0A
-       
             
@@ -1675,16 +1675,51 @@
 apping;%0A
+    myProducerCall = producerCall;%0A
   %7D%0A%0A  @
@@ -1967,11 +1967,247 @@
 ());%0A  %7D
+%0A%0A  @NotNull%0A  @Override%0A  public ProducerStreamCall getPrevCall() %7B%0A    return myProducerCall;%0A  %7D%0A%0A  @NotNull%0A  @Override%0A  public List%3CTraceElement%3E getPrevValues(@NotNull TraceElement value) %7B%0A    return Collections.emptyList();%0A  %7D
 %0A%7D%0A

Store reference to a producer in a ProducerState