TypeId.java revision 0e49fb9243b7463835ab80ef7cc62435f55846ce 
1/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.google.dexmaker;
18
19import com.android.dx.rop.cst.CstType;
20import java.util.HashMap;
21import java.util.Map;
22
23/**
24 * A primitive type, interface or class.
25 */
26public final class TypeId<T> {
27    /** The {@code boolean} primitive type. */
28    public static final TypeId<Boolean> BOOLEAN
29            = new TypeId<Boolean>(com.android.dx.rop.type.Type.BOOLEAN);
30
31    /** The {@code byte} primitive type. */
32    public static final TypeId<Byte> BYTE = new TypeId<Byte>(com.android.dx.rop.type.Type.BYTE);
33
34    /** The {@code char} primitive type. */
35    public static final TypeId<Character> CHAR
36            = new TypeId<Character>(com.android.dx.rop.type.Type.CHAR);
37
38    /** The {@code double} primitive type. */
39    public static final TypeId<Double> DOUBLE = new TypeId<Double>(com.android.dx.rop.type.Type.DOUBLE);
40
41    /** The {@code float} primitive type. */
42    public static final TypeId<Float> FLOAT = new TypeId<Float>(com.android.dx.rop.type.Type.FLOAT);
43
44    /** The {@code int} primitive type. */
45    public static final TypeId<Integer> INT = new TypeId<Integer>(com.android.dx.rop.type.Type.INT);
46
47    /** The {@code long} primitive type. */
48    public static final TypeId<Long> LONG = new TypeId<Long>(com.android.dx.rop.type.Type.LONG);
49
50    /** The {@code short} primitive type. */
51    public static final TypeId<Short> SHORT = new TypeId<Short>(com.android.dx.rop.type.Type.SHORT);
52
53    /** The {@code void} primitive type. Only used as a return type. */
54    public static final TypeId<Void> VOID = new TypeId<Void>(com.android.dx.rop.type.Type.VOID);
55
56    /** The {@code Object} type. */
57    public static final TypeId<Object> OBJECT = new TypeId<Object>(com.android.dx.rop.type.Type.OBJECT);
58
59    /** The {@code String} type. */
60    public static final TypeId<String> STRING = new TypeId<String>(com.android.dx.rop.type.Type.STRING);
61
62    private static final Map<Class<?>, TypeId<?>> PRIMITIVE_TO_TYPE
63            = new HashMap<Class<?>, TypeId<?>>();
64    static {
65        PRIMITIVE_TO_TYPE.put(boolean.class, BOOLEAN);
66        PRIMITIVE_TO_TYPE.put(byte.class, BYTE);
67        PRIMITIVE_TO_TYPE.put(char.class, CHAR);
68        PRIMITIVE_TO_TYPE.put(double.class, DOUBLE);
69        PRIMITIVE_TO_TYPE.put(float.class, FLOAT);
70        PRIMITIVE_TO_TYPE.put(int.class, INT);
71        PRIMITIVE_TO_TYPE.put(long.class, LONG);
72        PRIMITIVE_TO_TYPE.put(short.class, SHORT);
73        PRIMITIVE_TO_TYPE.put(void.class, VOID);
74    }
75
76    final String name;
77
78    /** cached converted values */
79    final com.android.dx.rop.type.Type ropType;
80    final CstType constant;
81
82    TypeId(com.android.dx.rop.type.Type ropType) {
83        this(ropType.getDescriptor(), ropType);
84    }
85
86    TypeId(String name, com.android.dx.rop.type.Type ropType) {
87        if (name == null || ropType == null) {
88            throw new NullPointerException();
89        }
90        this.name = name;
91        this.ropType = ropType;
92        this.constant = CstType.intern(ropType);
93    }
94
95    /**
96     * @param name a descriptor like "Ljava/lang/Class;".
97     */
98    public static <T> TypeId<T> get(String name) {
99        return new TypeId<T>(name, com.android.dx.rop.type.Type.internReturnType(name));
100    }
101
102    public static <T> TypeId<T> get(Class<T> type) {
103        if (type.isPrimitive()) {
104            @SuppressWarnings("unchecked") // guarded by equals
105                    TypeId<T> result = (TypeId<T>) PRIMITIVE_TO_TYPE.get(type);
106            return result;
107        }
108        String name = type.getName().replace('.', '/');
109        return get(type.isArray() ? name : 'L' + name + ';');
110    }
111
112    public <V> FieldId<T, V> getField(TypeId<V> type, String name) {
113        return new FieldId<T, V>(this, type, name);
114    }
115
116    public MethodId<T, Void> getConstructor(TypeId<?>... parameters) {
117        return new MethodId<T, Void>(this, VOID, "<init>", new TypeList(parameters));
118    }
119
120    public <R> MethodId<T, R> getMethod(TypeId<R> returnType, String name, TypeId<?>... parameters) {
121        return new MethodId<T, R>(this, returnType, name, new TypeList(parameters));
122    }
123
124    public String getName() {
125        return name;
126    }
127
128    @Override public boolean equals(Object o) {
129        return o instanceof TypeId
130                && ((TypeId) o).name.equals(name);
131    }
132
133    @Override public int hashCode() {
134        return name.hashCode();
135    }
136
137    @Override public String toString() {
138        return name;
139    }
140}
141