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refactor source tree organization, switch to meson
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Mis012
262
src/api-impl/android/content/ComponentName.java
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262
src/api-impl/android/content/ComponentName.java
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/*
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* Copyright (C) 2006 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.content;
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import java.io.PrintWriter;
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import java.lang.Comparable;
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/**
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* Identifier for a specific application component
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* ({@link android.app.Activity}, {@link android.app.Service},
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* {@link android.content.BroadcastReceiver}, or
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* {@link android.content.ContentProvider}) that is available. Two
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* pieces of information, encapsulated here, are required to identify
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* a component: the package (a String) it exists in, and the class (a String)
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* name inside of that package.
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*
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*/
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public final class ComponentName implements Cloneable, Comparable<ComponentName> {
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private final String mPackage;
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private final String mClass;
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/**
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* Create a new component identifier.
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*
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* @param pkg The name of the package that the component exists in. Can
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* not be null.
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* @param cls The name of the class inside of <var>pkg</var> that
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* implements the component. Can not be null.
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*/
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public ComponentName(String pkg, String cls) {
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if (pkg == null) throw new NullPointerException("package name is null");
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if (cls == null) throw new NullPointerException("class name is null");
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mPackage = pkg;
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mClass = cls;
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}
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/**
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* Create a new component identifier from a Context and class name.
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*
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* @param pkg A Context for the package implementing the component,
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* from which the actual package name will be retrieved.
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* @param cls The name of the class inside of <var>pkg</var> that
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* implements the component.
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*/
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public ComponentName(Context pkg, String cls) {
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if (cls == null) throw new NullPointerException("class name is null");
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mPackage = pkg.getPackageName();
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mClass = cls;
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}
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/**
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* Create a new component identifier from a Context and Class object.
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*
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* @param pkg A Context for the package implementing the component, from
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* which the actual package name will be retrieved.
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* @param cls The Class object of the desired component, from which the
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* actual class name will be retrieved.
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*/
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public ComponentName(Context pkg, Class<?> cls) {
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mPackage = pkg.getPackageName();
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mClass = cls.getName();
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}
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public ComponentName clone() {
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return new ComponentName(mPackage, mClass);
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}
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/**
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* Return the package name of this component.
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*/
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public String getPackageName() {
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return mPackage;
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}
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/**
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* Return the class name of this component.
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*/
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public String getClassName() {
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return mClass;
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}
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/**
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* Return the class name, either fully qualified or in a shortened form
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* (with a leading '.') if it is a suffix of the package.
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*/
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public String getShortClassName() {
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if (mClass.startsWith(mPackage)) {
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int PN = mPackage.length();
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int CN = mClass.length();
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if (CN > PN && mClass.charAt(PN) == '.') {
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return mClass.substring(PN, CN);
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}
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}
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return mClass;
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}
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private static void appendShortClassName(StringBuilder sb, String packageName,
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String className) {
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if (className.startsWith(packageName)) {
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int PN = packageName.length();
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int CN = className.length();
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if (CN > PN && className.charAt(PN) == '.') {
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sb.append(className, PN, CN);
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return;
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}
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}
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sb.append(className);
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}
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private static void printShortClassName(PrintWriter pw, String packageName,
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String className) {
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if (className.startsWith(packageName)) {
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int PN = packageName.length();
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int CN = className.length();
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if (CN > PN && className.charAt(PN) == '.') {
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pw.write(className, PN, CN-PN);
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return;
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}
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}
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pw.print(className);
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}
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/**
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* Return a String that unambiguously describes both the package and
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* class names contained in the ComponentName. You can later recover
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* the ComponentName from this string through
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* {@link #unflattenFromString(String)}.
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*
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* @return Returns a new String holding the package and class names. This
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* is represented as the package name, concatenated with a '/' and then the
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* class name.
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*
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* @see #unflattenFromString(String)
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*/
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public String flattenToString() {
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return mPackage + "/" + mClass;
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}
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/**
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* The same as {@link #flattenToString()}, but abbreviates the class
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* name if it is a suffix of the package. The result can still be used
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* with {@link #unflattenFromString(String)}.
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*
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* @return Returns a new String holding the package and class names. This
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* is represented as the package name, concatenated with a '/' and then the
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* class name.
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*
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* @see #unflattenFromString(String)
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*/
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public String flattenToShortString() {
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StringBuilder sb = new StringBuilder(mPackage.length() + mClass.length());
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appendShortString(sb, mPackage, mClass);
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return sb.toString();
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}
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/** @hide */
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public void appendShortString(StringBuilder sb) {
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appendShortString(sb, mPackage, mClass);
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}
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/** @hide */
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public static void appendShortString(StringBuilder sb, String packageName, String className) {
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sb.append(packageName).append('/');
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appendShortClassName(sb, packageName, className);
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}
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/** @hide */
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public static void printShortString(PrintWriter pw, String packageName, String className) {
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pw.print(packageName);
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pw.print('/');
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printShortClassName(pw, packageName, className);
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}
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/**
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* Recover a ComponentName from a String that was previously created with
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* {@link #flattenToString()}. It splits the string at the first '/',
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* taking the part before as the package name and the part after as the
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* class name. As a special convenience (to use, for example, when
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* parsing component names on the command line), if the '/' is immediately
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* followed by a '.' then the final class name will be the concatenation
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* of the package name with the string following the '/'. Thus
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* "com.foo/.Blah" becomes package="com.foo" class="com.foo.Blah".
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*
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* @param str The String that was returned by flattenToString().
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* @return Returns a new ComponentName containing the package and class
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* names that were encoded in <var>str</var>
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*
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* @see #flattenToString()
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*/
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public static ComponentName unflattenFromString(String str) {
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int sep = str.indexOf('/');
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if (sep < 0 || (sep+1) >= str.length()) {
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return null;
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}
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String pkg = str.substring(0, sep);
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String cls = str.substring(sep+1);
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if (cls.length() > 0 && cls.charAt(0) == '.') {
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cls = pkg + cls;
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}
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return new ComponentName(pkg, cls);
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}
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/**
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* Return string representation of this class without the class's name
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* as a prefix.
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*/
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public String toShortString() {
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return "{" + mPackage + "/" + mClass + "}";
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}
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@Override
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public String toString() {
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return "ComponentInfo{" + mPackage + "/" + mClass + "}";
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}
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@Override
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public boolean equals(Object obj) {
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try {
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if (obj != null) {
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ComponentName other = (ComponentName)obj;
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// Note: no null checks, because mPackage and mClass can
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// never be null.
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return mPackage.equals(other.mPackage)
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&& mClass.equals(other.mClass);
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}
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} catch (ClassCastException e) {
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}
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return false;
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}
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@Override
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public int hashCode() {
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return mPackage.hashCode() + mClass.hashCode();
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}
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public int compareTo(ComponentName that) {
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int v;
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v = this.mPackage.compareTo(that.mPackage);
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if (v != 0) {
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return v;
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}
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return this.mClass.compareTo(that.mClass);
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}
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public int describeContents() {
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return 0;
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}
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}
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