001 /*
002 * Copyright 2010-2015 JetBrains s.r.o.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017 package org.jetbrains.kotlin.resolve.calls.model;
018
019 import org.jetbrains.annotations.NotNull;
020 import org.jetbrains.annotations.Nullable;
021 import org.jetbrains.kotlin.psi.Call;
022 import org.jetbrains.kotlin.psi.ValueArgument;
023 import org.jetbrains.kotlin.resolve.calls.smartcasts.DataFlowInfo;
024
025 import java.util.HashMap;
026 import java.util.Iterator;
027 import java.util.List;
028 import java.util.Map;
029
030 public class DataFlowInfoForArgumentsImpl implements MutableDataFlowInfoForArguments {
031 @NotNull private final Call call; //for better debug messages only
032 @Nullable private Map<ValueArgument, DataFlowInfo> infoMap = null;
033 @Nullable private Map<ValueArgument, ValueArgument> nextArgument = null;
034 @Nullable private DataFlowInfo initialInfo;
035 @Nullable private DataFlowInfo resultInfo;
036
037 public DataFlowInfoForArgumentsImpl(@NotNull Call call) {
038 this.call = call;
039 initNextArgMap(call.getValueArguments());
040 }
041
042 private void initNextArgMap(@NotNull List<? extends ValueArgument> valueArguments) {
043 Iterator<? extends ValueArgument> iterator = valueArguments.iterator();
044 ValueArgument prev = null;
045 while (iterator.hasNext()) {
046 ValueArgument argument = iterator.next();
047 if (prev != null) {
048 if (nextArgument == null) {
049 nextArgument = new HashMap<ValueArgument, ValueArgument>();
050 }
051 nextArgument.put(prev, argument);
052 }
053 prev = argument;
054 }
055 }
056
057 @Override
058 public void setInitialDataFlowInfo(@NotNull DataFlowInfo dataFlowInfo) {
059 //TODO assert initialInfo == null
060 initialInfo = dataFlowInfo;
061 }
062
063 @NotNull
064 @Override
065 public DataFlowInfo getInfo(@NotNull ValueArgument valueArgument) {
066 assert initialInfo != null : "Initial data flow info was not set for call: " + call;
067 DataFlowInfo infoForArgument = infoMap == null ? null : infoMap.get(valueArgument);
068 if (infoForArgument == null) {
069 return initialInfo;
070 }
071 return initialInfo.and(infoForArgument);
072 }
073
074 @Override
075 public void updateInfo(@NotNull ValueArgument valueArgument, @NotNull DataFlowInfo dataFlowInfo) {
076 ValueArgument next = nextArgument == null ? null : nextArgument.get(valueArgument);
077 if (next != null) {
078 if (infoMap == null) {
079 infoMap = new HashMap<ValueArgument, DataFlowInfo>();
080 }
081 infoMap.put(next, dataFlowInfo);
082 return;
083 }
084 //TODO assert resultInfo == null
085 resultInfo = dataFlowInfo;
086 }
087
088 @NotNull
089 @Override
090 public DataFlowInfo getResultInfo() {
091 assert initialInfo != null : "Initial data flow info was not set for call: " + call;
092 if (resultInfo == null) return initialInfo;
093 return initialInfo.and(resultInfo);
094 }
095 }