1/*
2 * Copyright 2014, Google Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met:
8 *
9 *     * Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *     * Redistributions in binary form must reproduce the above
12 * copyright notice, this list of conditions and the following disclaimer
13 * in the documentation and/or other materials provided with the
14 * distribution.
15 *     * Neither the name of Google Inc. nor the names of its
16 * contributors may be used to endorse or promote products derived from
17 * this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32package org.jf.smalidea.psi.impl;
33
34import com.google.common.collect.ImmutableList;
35import com.intellij.lang.ASTNode;
36import com.intellij.psi.PsiElement;
37import com.intellij.psi.impl.source.tree.CompositePsiElement;
38import com.intellij.psi.tree.IElementType;
39import org.jetbrains.annotations.NotNull;
40import org.jetbrains.annotations.Nullable;
41
42import java.lang.reflect.Array;
43import java.util.ArrayList;
44import java.util.List;
45
46public abstract class SmaliCompositeElement extends CompositePsiElement {
47    public SmaliCompositeElement(IElementType type) {
48        super(type);
49    }
50
51    @NotNull
52    @SuppressWarnings("unchecked")
53    protected List<ASTNode> findChildrenByType(IElementType elementType) {
54        List<ASTNode> result = ImmutableList.of();
55        ASTNode child = getNode().getFirstChildNode();
56        while (child != null) {
57            if (elementType == child.getElementType()) {
58                if (result.size() == 0) {
59                    result = new ArrayList<ASTNode>();
60                }
61                result.add((ASTNode)child.getPsi());
62            }
63            child = child.getTreeNext();
64        }
65        return result;
66    }
67
68    @NotNull
69    @SuppressWarnings("unchecked")
70    protected <T> T[] findChildrenByClass(Class<T> aClass) {
71        List<T> result = new ArrayList<T>();
72        for (PsiElement cur = getFirstChild(); cur != null; cur = cur.getNextSibling()) {
73            if (aClass.isInstance(cur)) result.add((T)cur);
74        }
75        return result.toArray((T[]) Array.newInstance(aClass, result.size()));
76    }
77
78    @Nullable
79    @SuppressWarnings("unchecked")
80    protected <T> T findChildByClass(Class<T> aClass) {
81        for (PsiElement cur = getFirstChild(); cur != null; cur = cur.getNextSibling()) {
82            if (aClass.isInstance(cur)) return (T)cur;
83        }
84        return null;
85    }
86
87    @Nullable
88    @SuppressWarnings("unchecked")
89    protected <T> T findAncestorByClass(Class<T> aClass) {
90        PsiElement parent = getParent();
91        while (parent != null) {
92            if (aClass.isInstance(parent)) {
93                return (T)parent;
94            }
95            parent = parent.getParent();
96        }
97        return null;
98    }
99
100    @Nullable
101    @SuppressWarnings("unchecked")
102    public <T> T findNextSiblingByClass(@NotNull Class<T> cls) {
103        PsiElement prev = getNextSibling();
104        while (true) {
105            if (prev == null) {
106                return null;
107            } else if (cls.isInstance(prev)) {
108                return (T)prev;
109            }
110            prev = prev.getNextSibling();
111        }
112    }
113
114    @Nullable
115    @SuppressWarnings("unchecked")
116    public <T> T findPrevSiblingByClass(@NotNull Class<T> cls) {
117        PsiElement prev = getPrevSibling();
118        while (true) {
119            if (prev == null) {
120                return null;
121            } else if (cls.isInstance(prev)) {
122                return (T)prev;
123            }
124            prev = prev.getPrevSibling();
125        }
126    }
127}
128