001/*
002 * Copyright 2010-2013 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
017package org.jetbrains.jet.lang.resolve.calls.inference;
018
019import org.jetbrains.annotations.NotNull;
020import org.jetbrains.jet.lang.types.JetType;
021
022import java.text.MessageFormat;
023
024/**
025 * A specific type for subtype constraint of types.
026 */
027public enum ConstraintType implements Comparable<ConstraintType> {
028    // The order of these constants DOES matter
029    // they are compared according to ordinal() values
030    // First element has the highest priority
031    RECEIVER("{0} is not a subtype of the expected receiver type {1}"),
032    VALUE_ARGUMENT("Type mismatch: argument type is {0}, but {1} was expected"),
033    EXPECTED_TYPE("Resulting type is {0} but {1} was expected"),
034    PARAMETER_BOUND("Type parameter bound is not satisfied: {0} is not a subtype of {1}");
035
036    private final String errorMessageTemplate; // {0} is subtype, {1} is supertype
037
038    private ConstraintType(@NotNull String errorMessageTemplate) {
039        this.errorMessageTemplate = errorMessageTemplate;
040    }
041
042    @NotNull
043    public SubtypingConstraint assertSubtyping(@NotNull JetType subtype, @NotNull JetType supertype) {
044        return new SubtypingConstraint(this, subtype, supertype);
045    }
046
047    @NotNull
048    public String makeErrorMessage(@NotNull SubtypingConstraint constraint) {
049        return MessageFormat.format(errorMessageTemplate, constraint.getSubtype(), constraint.getSupertype());
050    }
051}