/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package java.lang.reflect;
/**
* This class provides static methods to decode class and member modifiers.
*
* @see Class#getModifiers()
* @see Member#getModifiers()
*
* @since Android 1.0
*/
public class Modifier {
/**
* The {@code int} value representing the {@code public}
* modifier.
*
* @since Android 1.0
*/
public static final int PUBLIC = 0x1;
/**
* The {@code int} value representing the {@code private}
* modifier.
*
* @since Android 1.0
*/
public static final int PRIVATE = 0x2;
/**
* The {@code int} value representing the {@code protected}
* modifier.
*
* @since Android 1.0
*/
public static final int PROTECTED = 0x4;
/**
* The {@code int} value representing the {@code static} modifier.
*
* @since Android 1.0
*/
public static final int STATIC = 0x8;
/**
* The {@code int} value representing the {@code final} modifier.
*
* @since Android 1.0
*/
public static final int FINAL = 0x10;
/**
* The {@code int} value representing the {@code synchronized}
* modifier.
*
* @since Android 1.0
*/
public static final int SYNCHRONIZED = 0x20;
/**
* The {@code int} value representing the {@code volatile}
* modifier.
*
* @since Android 1.0
*/
public static final int VOLATILE = 0x40;
/**
* The {@code int} value representing the {@code transient}
* modifier.
*
* @since Android 1.0
*/
public static final int TRANSIENT = 0x80;
/**
* The {@code int} value representing the {@code native} modifier.
*
* @since Android 1.0
*/
public static final int NATIVE = 0x100;
/**
* The {@code int} value representing the {@code interface}
* modifier.
*
* @since Android 1.0
*/
public static final int INTERFACE = 0x200;
/**
* The {@code int} value representing the {@code abstract}
* modifier.
*
* @since Android 1.0
*/
public static final int ABSTRACT = 0x400;
/**
* The {@code int} value representing the {@code strict} modifier.
*
* @since Android 1.0
*/
public static final int STRICT = 0x800;
// Non-public types required by Java 5 update to class file format
static final int BRIDGE = 0x40;
static final int VARARGS = 0x80;
static final int SYNTHETIC = 0x1000;
static final int ANNOTATION = 0x2000;
static final int ENUM = 0x4000;
/**
* Constructs a new {@code Modifier} instance.
*
* @since Android 1.0
*/
public Modifier() {
}
/**
* Indicates whether or not the specified modifiers contain the {@code
* abstract} modifier.
*
* @param modifiers
* the modifiers to test
*
* @return {@code true} if the specified modifiers contain the {@code
* abstract} modifier, {@code false} otherwise
*
* @since Android 1.0
*/
public static boolean isAbstract(int modifiers) {
return ((modifiers & ABSTRACT) != 0);
}
/**
* Indicates whether or not the specified modifiers contain the {@code
* final} modifier.
*
* @param modifiers
* the modifiers to test
*
* @return {@code true} if the specified modifiers contain the {@code
* final} modifier, {@code false} otherwise
*
* @since Android 1.0
*/
public static boolean isFinal(int modifiers) {
return ((modifiers & FINAL) != 0);
}
/**
* Indicates whether or not the specified modifiers contain the {@code
* interface} modifier.
*
* @param modifiers
* the modifiers to test
*
* @return {@code true} if the specified modifiers contain the {@code
* interface} modifier, {@code false} otherwise
*
* @since Android 1.0
*/
public static boolean isInterface(int modifiers) {
return ((modifiers & INTERFACE) != 0);
}
/**
* Indicates whether or not the specified modifiers contain the {@code
* native} modifier.
*
* @param modifiers
* the modifiers to test
*
* @return {@code true} if the specified modifiers contain the {@code
* native} modifier, {@code false} otherwise
*
* @since Android 1.0
*/
public static boolean isNative(int modifiers) {
return ((modifiers & NATIVE) != 0);
}
/**
* Indicates whether or not the specified modifiers contain the {@code
* private} modifier.
*
* @param modifiers
* the modifiers to test
*
* @return {@code true} if the specified modifiers contain the {@code
* private} modifier, {@code false} otherwise
*
* @since Android 1.0
*/
public static boolean isPrivate(int modifiers) {
return ((modifiers & PRIVATE) != 0);
}
/**
* Indicates whether or not the specified modifiers contain the {@code
* protected} modifier.
*
* @param modifiers
* the modifiers to test
*
* @return {@code true} if the specified modifiers contain the {@code
* protected} modifier, {@code false} otherwise
*
* @since Android 1.0
*/
public static boolean isProtected(int modifiers) {
return ((modifiers & PROTECTED) != 0);
}
/**
* Indicates whether or not the specified modifiers contain the {@code
* public} modifier.
*
* @param modifiers
* the modifiers to test
*
* @return {@code true} if the specified modifiers contain the {@code
* public} modifier, {@code false} otherwise
*
* @since Android 1.0
*/
public static boolean isPublic(int modifiers) {
return ((modifiers & PUBLIC) != 0);
}
/**
* Indicates whether or not the specified modifiers contain the {@code
* static} modifier.
*
* @param modifiers
* the modifiers to test
*
* @return {@code true} if the specified modifiers contain the {@code
* static} modifier, {@code false} otherwise
*
* @since Android 1.0
*/
public static boolean isStatic(int modifiers) {
return ((modifiers & STATIC) != 0);
}
/**
* Indicates whether or not the specified modifiers contain the {@code
* strict} modifier.
*
* @param modifiers
* the modifiers to test
*
* @return {@code true} if the specified modifiers contain the {@code
* strict} modifier, {@code false} otherwise
*
* @since Android 1.0
*/
public static boolean isStrict(int modifiers) {
return ((modifiers & STRICT) != 0);
}
/**
* Indicates whether or not the specified modifiers contain the {@code
* synchronized} modifier.
*
* @param modifiers
* the modifiers to test
*
* @return {@code true} if the specified modifiers contain the {@code
* synchronized} modifier, {@code false} otherwise
*
* @since Android 1.0
*/
public static boolean isSynchronized(int modifiers) {
return ((modifiers & SYNCHRONIZED) != 0);
}
/**
* Indicates whether or not the specified modifiers contain the {@code
* transient} modifier.
*
* @param modifiers
* the modifiers to test
*
* @return {@code true} if the specified modifiers contain the {@code
* transient} modifier, {@code false} otherwise
*
* @since Android 1.0
*/
public static boolean isTransient(int modifiers) {
return ((modifiers & TRANSIENT) != 0);
}
/**
* Indicates whether or not the specified modifiers contain the {@code
* volatile} modifier.
*
* @param modifiers
* the modifiers to test
*
* @return {@code true} if the specified modifiers contain the {@code
* volatile} modifier, {@code false} otherwise
*
* @since Android 1.0
*/
public static boolean isVolatile(int modifiers) {
return ((modifiers & VOLATILE) != 0);
}
/**
* Returns a string containing the string representation of all modifiers
* present in the specified modifiers. Modifiers appear in the order
* specified by the Java Language Specification:
*
* {@code public private protected abstract static final transient volatile native synchronized interface strict}
*
* @param modifiers
* the modifiers to print
*
* @return a printable representation of the modifiers
*
* @since Android 1.0
*/
@SuppressWarnings("nls")
public static java.lang.String toString(int modifiers) {
StringBuffer buf;
buf = new StringBuffer();
if (isPublic(modifiers)) {
buf.append("public ");
}
if (isProtected(modifiers)) {
buf.append("protected ");
}
if (isPrivate(modifiers)) {
buf.append("private ");
}
if (isAbstract(modifiers)) {
buf.append("abstract ");
}
if (isStatic(modifiers)) {
buf.append("static ");
}
if (isFinal(modifiers)) {
buf.append("final ");
}
if (isTransient(modifiers)) {
buf.append("transient ");
}
if (isVolatile(modifiers)) {
buf.append("volatile ");
}
if (isSynchronized(modifiers)) {
buf.append("synchronized ");
}
if (isNative(modifiers)) {
buf.append("native ");
}
if (isStrict(modifiers)) {
buf.append("strictfp ");
}
if (isInterface(modifiers)) {
buf.append("interface ");
}
if (buf.length() == 0) {
return "";
}
buf.setLength(buf.length() - 1);
return buf.toString();
}
}
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