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/*
* Copyright (C) 2009 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.pim.vcard;
import android.text.TextUtils;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
/**
* <p>
* The class which tries to detects the source of a vCard file from its contents.
* </p>
* <p>
* The specification of vCard (including both 2.1 and 3.0) is not so strict as to
* guess its format just by reading beginning few lines (usually we can, but in
* some most pessimistic case, we cannot until at almost the end of the file).
* Also we cannot store all vCard entries in memory, while there's no specification
* how big the vCard entry would become after the parse.
* </p>
* <p>
* This class is usually used for the "first scan", in which we can understand which vCard
* version is used (and how many entries exist in a file).
* </p>
*/
public class VCardSourceDetector implements VCardInterpreter {
private static Set<String> APPLE_SIGNS = new HashSet<String>(Arrays.asList(
"X-PHONETIC-FIRST-NAME", "X-PHONETIC-MIDDLE-NAME", "X-PHONETIC-LAST-NAME",
"X-ABADR", "X-ABUID"));
private static Set<String> JAPANESE_MOBILE_PHONE_SIGNS = new HashSet<String>(Arrays.asList(
"X-GNO", "X-GN", "X-REDUCTION"));
private static Set<String> WINDOWS_MOBILE_PHONE_SIGNS = new HashSet<String>(Arrays.asList(
"X-MICROSOFT-ASST_TEL", "X-MICROSOFT-ASSISTANT", "X-MICROSOFT-OFFICELOC"));
// Note: these signes appears before the signs of the other type (e.g. "X-GN").
// In other words, Japanese FOMA mobile phones are detected as FOMA, not JAPANESE_MOBILE_PHONES.
private static Set<String> FOMA_SIGNS = new HashSet<String>(Arrays.asList(
"X-SD-VERN", "X-SD-FORMAT_VER", "X-SD-CATEGORIES", "X-SD-CLASS", "X-SD-DCREATED",
"X-SD-DESCRIPTION"));
private static String TYPE_FOMA_CHARSET_SIGN = "X-SD-CHAR_CODE";
// TODO: Should replace this with types in VCardConfig
private static final int PARSE_TYPE_UNKNOWN = 0;
// For Apple's software, which does not mean this type is effective for all its products.
// We confirmed they usually use UTF-8, but not sure about vCard type.
private static final int PARSE_TYPE_APPLE = 1;
// For Japanese mobile phones, which are usually using Shift_JIS as a charset.
private static final int PARSE_TYPE_MOBILE_PHONE_JP = 2;
// For some of mobile phones released from DoCoMo, which use nested vCard.
private static final int PARSE_TYPE_DOCOMO_TORELATE_NEST = 3;
// For Japanese Windows Mobel phones. It's version is supposed to be 6.5.
private static final int PARSE_TYPE_WINDOWS_MOBILE_V65_JP = 4;
private int mParseType = 0; // Not sure.
// Some mobile phones (like FOMA) tells us the charset of the data.
private boolean mNeedParseSpecifiedCharset;
private String mSpecifiedCharset;
public void start() {
}
public void end() {
}
public void startEntry() {
}
public void startProperty() {
mNeedParseSpecifiedCharset = false;
}
public void endProperty() {
}
public void endEntry() {
}
public void propertyGroup(String group) {
}
public void propertyName(String name) {
if (name.equalsIgnoreCase(TYPE_FOMA_CHARSET_SIGN)) {
mParseType = PARSE_TYPE_DOCOMO_TORELATE_NEST;
// Probably Shift_JIS is used, but we should double confirm.
mNeedParseSpecifiedCharset = true;
return;
}
if (mParseType != PARSE_TYPE_UNKNOWN) {
return;
}
if (WINDOWS_MOBILE_PHONE_SIGNS.contains(name)) {
mParseType = PARSE_TYPE_WINDOWS_MOBILE_V65_JP;
} else if (FOMA_SIGNS.contains(name)) {
mParseType = PARSE_TYPE_DOCOMO_TORELATE_NEST;
} else if (JAPANESE_MOBILE_PHONE_SIGNS.contains(name)) {
mParseType = PARSE_TYPE_MOBILE_PHONE_JP;
} else if (APPLE_SIGNS.contains(name)) {
mParseType = PARSE_TYPE_APPLE;
}
}
public void propertyParamType(String type) {
}
public void propertyParamValue(String value) {
}
public void propertyValues(List<String> values) {
if (mNeedParseSpecifiedCharset && values.size() > 0) {
mSpecifiedCharset = values.get(0);
}
}
/**
* @return The available type can be used with vCard parser. You probably need to
* use {{@link #getEstimatedCharset()} to understand the charset to be used.
*/
public int getEstimatedType() {
switch (mParseType) {
case PARSE_TYPE_DOCOMO_TORELATE_NEST:
return VCardConfig.VCARD_TYPE_DOCOMO | VCardConfig.FLAG_TORELATE_NEST;
case PARSE_TYPE_MOBILE_PHONE_JP:
return VCardConfig.VCARD_TYPE_V21_JAPANESE_MOBILE;
case PARSE_TYPE_APPLE:
case PARSE_TYPE_WINDOWS_MOBILE_V65_JP:
default:
return VCardConfig.VCARD_TYPE_UNKNOWN;
}
}
/**
* <p>
* Returns charset String guessed from the source's properties.
* This method must be called after parsing target file(s).
* </p>
* @return Charset String. Null is returned if guessing the source fails.
*/
public String getEstimatedCharset() {
if (TextUtils.isEmpty(mSpecifiedCharset)) {
return mSpecifiedCharset;
}
switch (mParseType) {
case PARSE_TYPE_WINDOWS_MOBILE_V65_JP:
case PARSE_TYPE_DOCOMO_TORELATE_NEST:
case PARSE_TYPE_MOBILE_PHONE_JP:
return "SHIFT_JIS";
case PARSE_TYPE_APPLE:
return "UTF-8";
default:
return null;
}
}
}
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