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.types;
018    
019    public abstract class TypeProjectionBase implements TypeProjection {
020    
021        @Override
022        public String toString() {
023            if (isStarProjection()) {
024                return "*";
025            }
026            if (getProjectionKind() == Variance.INVARIANT) {
027                return getType().toString();
028            }
029            return getProjectionKind() + " " + getType();
030        }
031    
032        @Override
033        public boolean equals(Object o) {
034            if (this == o) return true;
035            if (!(o instanceof TypeProjection)) return false;
036    
037            TypeProjection that = (TypeProjection) o;
038    
039            if (getProjectionKind() != that.getProjectionKind()) return false;
040            if (!getType().equals(that.getType())) return false;
041    
042            return true;
043        }
044    
045        @Override
046        public int hashCode() {
047            int result = getProjectionKind().hashCode();
048            result = 31 * result + (isStarProjection() ? 17 : getType().hashCode());
049            return result;
050        }
051    }