DiagList.java revision 3827:44bdefe64114 
1/*
2 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26package jdk.jshell;
27
28import java.util.ArrayList;
29import java.util.Collection;
30import java.util.stream.Collectors;
31
32/**
33 * List of diagnostics, with convenient operations.
34 *
35 * @author Robert Field
36 */
37@SuppressWarnings("serial")             // serialVersionUID intentionally omitted
38final class DiagList extends ArrayList<Diag> {
39
40    private int cntNotStmt = 0;
41    private int cntUnreach = 0;
42    private int cntResolve = 0;
43    private int cntOther = 0;
44
45    DiagList() {
46        super();
47    }
48
49    DiagList(Diag d) {
50        super();
51        add(d);
52    }
53
54    DiagList(Collection<? extends Diag> c) {
55        super();
56        addAll(c);
57    }
58
59    private void tally(Diag d) {
60        if (d.isError()) {
61            if (d.isUnreachableError()) {
62                ++cntUnreach;
63            } else if (d.isNotAStatementError()) {
64                ++cntNotStmt;
65            } else if (d.isResolutionError()) {
66                ++cntResolve;
67            } else {
68                ++cntOther;
69            }
70        }
71    }
72
73    @Override
74    public boolean addAll(Collection<? extends Diag> c) {
75        return c.stream().filter(this::add).count() > 0;
76    }
77
78    @Override
79    public Diag set(int index, Diag element) {
80        throw new UnsupportedOperationException();
81    }
82
83    @Override
84    public void add(int index, Diag element) {
85        throw new UnsupportedOperationException();
86    }
87
88    @Override
89    public boolean add(Diag d) {
90        boolean added = super.add(d);
91        if (added) {
92            tally(d);
93        }
94        return added;
95    }
96
97    @Override
98    public boolean addAll(int index, Collection<? extends Diag> c) {
99        throw new UnsupportedOperationException();
100    }
101
102    @Override
103    public boolean remove(Object o) {
104        throw new UnsupportedOperationException();
105    }
106
107    DiagList ofUnit(Unit u) {
108        return this.stream()
109                .filter(d -> {
110                    Snippet snn = d.snippetOrNull();
111                    return snn == u.snippet();
112                })
113                .collect(Collectors.toCollection(DiagList::new));
114    }
115
116    boolean hasErrors() {
117        return (cntNotStmt + cntResolve + cntUnreach + cntOther) > 0;
118    }
119
120    boolean hasResolutionErrorsAndNoOthers() {
121        return cntResolve > 0 && (cntNotStmt + cntUnreach + cntOther) == 0;
122    }
123
124    boolean hasUnreachableError() {
125        return cntUnreach > 0;
126    }
127
128    boolean hasNotStatement() {
129        return cntNotStmt > 0;
130    }
131
132    boolean hasOtherThanNotStatementErrors() {
133        return (cntResolve + cntUnreach + cntOther) > 0;
134    }
135
136}
137