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/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed 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 android.text.util;
import android.annotation.Nullable;
/**
* This class stores an RFC 822-like name, address, and comment,
* and provides methods to convert them to quoted strings.
*/
public class Rfc822Token {
@Nullable
private String mName, mAddress, mComment;
/**
* Creates a new Rfc822Token with the specified name, address,
* and comment.
*/
public Rfc822Token(@Nullable String name, @Nullable String address, @Nullable String comment) {
mName = name;
mAddress = address;
mComment = comment;
}
/**
* Returns the name part.
*/
@Nullable
public String getName() {
return mName;
}
/**
* Returns the address part.
*/
@Nullable
public String getAddress() {
return mAddress;
}
/**
* Returns the comment part.
*/
@Nullable
public String getComment() {
return mComment;
}
/**
* Changes the name to the specified name.
*/
public void setName(@Nullable String name) {
mName = name;
}
/**
* Changes the address to the specified address.
*/
public void setAddress(@Nullable String address) {
mAddress = address;
}
/**
* Changes the comment to the specified comment.
*/
public void setComment(@Nullable String comment) {
mComment = comment;
}
/**
* Returns the name (with quoting added if necessary),
* the comment (in parentheses), and the address (in angle brackets).
* This should be suitable for inclusion in an RFC 822 address list.
*/
public String toString() {
StringBuilder sb = new StringBuilder();
if (mName != null && mName.length() != 0) {
sb.append(quoteNameIfNecessary(mName));
sb.append(' ');
}
if (mComment != null && mComment.length() != 0) {
sb.append('(');
sb.append(quoteComment(mComment));
sb.append(") ");
}
if (mAddress != null && mAddress.length() != 0) {
sb.append('<');
sb.append(mAddress);
sb.append('>');
}
return sb.toString();
}
/**
* Returns the name, conservatively quoting it if there are any
* characters that are likely to cause trouble outside of a
* quoted string, or returning it literally if it seems safe.
*/
public static String quoteNameIfNecessary(String name) {
int len = name.length();
for (int i = 0; i < len; i++) {
char c = name.charAt(i);
if (! ((c >= 'A' && c <= 'Z') ||
(c >= 'a' && c <= 'z') ||
(c == ' ') ||
(c >= '0' && c <= '9'))) {
return '"' + quoteName(name) + '"';
}
}
return name;
}
/**
* Returns the name, with internal backslashes and quotation marks
* preceded by backslashes. The outer quote marks themselves are not
* added by this method.
*/
public static String quoteName(String name) {
StringBuilder sb = new StringBuilder();
int len = name.length();
for (int i = 0; i < len; i++) {
char c = name.charAt(i);
if (c == '\\' || c == '"') {
sb.append('\\');
}
sb.append(c);
}
return sb.toString();
}
/**
* Returns the comment, with internal backslashes and parentheses
* preceded by backslashes. The outer parentheses themselves are
* not added by this method.
*/
public static String quoteComment(String comment) {
int len = comment.length();
StringBuilder sb = new StringBuilder();
for (int i = 0; i < len; i++) {
char c = comment.charAt(i);
if (c == '(' || c == ')' || c == '\\') {
sb.append('\\');
}
sb.append(c);
}
return sb.toString();
}
public int hashCode() {
int result = 17;
if (mName != null) result = 31 * result + mName.hashCode();
if (mAddress != null) result = 31 * result + mAddress.hashCode();
if (mComment != null) result = 31 * result + mComment.hashCode();
return result;
}
private static boolean stringEquals(String a, String b) {
if (a == null) {
return (b == null);
} else {
return (a.equals(b));
}
}
public boolean equals(Object o) {
if (!(o instanceof Rfc822Token)) {
return false;
}
Rfc822Token other = (Rfc822Token) o;
return (stringEquals(mName, other.mName) &&
stringEquals(mAddress, other.mAddress) &&
stringEquals(mComment, other.mComment));
}
}
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