com.ibm.icu.impl.ICUResourceBundleReader Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of icu4j Show documentation
Show all versions of icu4j Show documentation
International Component for Unicode for Java (ICU4J) is a mature, widely used Java library
providing Unicode and Globalization support
The newest version!
// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
*******************************************************************************
* Copyright (C) 2004-2016, International Business Machines Corporation and
* others. All Rights Reserved.
*******************************************************************************
*/
package com.ibm.icu.impl;
import java.io.IOException;
import java.io.InputStream;
import java.lang.ref.SoftReference;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.IntBuffer;
import java.nio.charset.StandardCharsets;
import java.util.Arrays;
import com.ibm.icu.util.ICUException;
import com.ibm.icu.util.ICUUncheckedIOException;
import com.ibm.icu.util.ULocale;
import com.ibm.icu.util.UResourceBundle;
import com.ibm.icu.util.UResourceTypeMismatchException;
import com.ibm.icu.util.VersionInfo;
/**
* This class reads the *.res resource bundle format.
*
* For the file format documentation see ICU4C's source/common/uresdata.h file.
*/
public final class ICUResourceBundleReader {
/**
* File format version that this class understands.
* "ResB"
*/
private static final int DATA_FORMAT = 0x52657342;
private static final class IsAcceptable implements ICUBinary.Authenticate {
@Override
public boolean isDataVersionAcceptable(byte formatVersion[]) {
return
(formatVersion[0] == 1 && (formatVersion[1] & 0xff) >= 1) ||
(2 <= formatVersion[0] && formatVersion[0] <= 3);
}
}
private static final IsAcceptable IS_ACCEPTABLE = new IsAcceptable();
/* indexes[] value names; indexes are generally 32-bit (Resource) indexes */
/**
* [0] contains the length of indexes[]
* which is at most URES_INDEX_TOP of the latest format version
*
* formatVersion==1: all bits contain the length of indexes[]
* but the length is much less than 0xff;
* formatVersion>1:
* only bits 7..0 contain the length of indexes[],
* bits 31..8 are reserved and set to 0
* formatVersion>=3:
* bits 31..8 poolStringIndexLimit bits 23..0
*/
private static final int URES_INDEX_LENGTH = 0;
/**
* [1] contains the top of the key strings,
* same as the bottom of resources or UTF-16 strings, rounded up
*/
private static final int URES_INDEX_KEYS_TOP = 1;
/** [2] contains the top of all resources */
//ivate static final int URES_INDEX_RESOURCES_TOP = 2;
/**
* [3] contains the top of the bundle,
* in case it were ever different from [2]
*/
private static final int URES_INDEX_BUNDLE_TOP = 3;
/** [4] max. length of any table */
private static final int URES_INDEX_MAX_TABLE_LENGTH = 4;
/**
* [5] attributes bit set, see URES_ATT_* (new in formatVersion 1.2)
*
* formatVersion>=3:
* bits 31..16 poolStringIndex16Limit
* bits 15..12 poolStringIndexLimit bits 27..24
*/
private static final int URES_INDEX_ATTRIBUTES = 5;
/**
* [6] top of the 16-bit units (UTF-16 string v2 UChars, URES_TABLE16, URES_ARRAY16),
* rounded up (new in formatVersion 2.0, ICU 4.4)
*/
private static final int URES_INDEX_16BIT_TOP = 6;
/** [7] checksum of the pool bundle (new in formatVersion 2.0, ICU 4.4) */
private static final int URES_INDEX_POOL_CHECKSUM = 7;
//ivate static final int URES_INDEX_TOP = 8;
/*
* Nofallback attribute, attribute bit 0 in indexes[URES_INDEX_ATTRIBUTES].
* New in formatVersion 1.2 (ICU 3.6).
*
* If set, then this resource bundle is a standalone bundle.
* If not set, then the bundle participates in locale fallback, eventually
* all the way to the root bundle.
* If indexes[] is missing or too short, then the attribute cannot be determined
* reliably. Dependency checking should ignore such bundles, and loading should
* use fallbacks.
*/
private static final int URES_ATT_NO_FALLBACK = 1;
/*
* Attributes for bundles that are, or use, a pool bundle.
* A pool bundle provides key strings that are shared among several other bundles
* to reduce their total size.
* New in formatVersion 2 (ICU 4.4).
*/
private static final int URES_ATT_IS_POOL_BUNDLE = 2;
private static final int URES_ATT_USES_POOL_BUNDLE = 4;
private static final CharBuffer EMPTY_16_BIT_UNITS = CharBuffer.wrap("\0"); // read-only
/**
* Objects with more value bytes are stored in SoftReferences.
* Smaller objects (which are not much larger than a SoftReference)
* are stored directly, avoiding the overhead of the reference.
*/
static final int LARGE_SIZE = 24;
private static final boolean DEBUG = false;
private int /* formatVersion, */ dataVersion;
// See the ResourceData struct in ICU4C/source/common/uresdata.h.
/**
* Buffer of all of the resource bundle bytes after the header.
* (equivalent of C++ pRoot)
*/
private ByteBuffer bytes;
private byte[] keyBytes;
private CharBuffer b16BitUnits;
private ICUResourceBundleReader poolBundleReader;
private int rootRes;
private int localKeyLimit;
private int poolStringIndexLimit;
private int poolStringIndex16Limit;
private boolean noFallback; /* see URES_ATT_NO_FALLBACK */
private boolean isPoolBundle;
private boolean usesPoolBundle;
private int poolCheckSum;
private ResourceCache resourceCache;
private static ReaderCache CACHE = new ReaderCache();
private static final ICUResourceBundleReader NULL_READER = new ICUResourceBundleReader();
private static class ReaderCacheKey {
final String baseName;
final String localeID;
ReaderCacheKey(String baseName, String localeID) {
this.baseName = (baseName == null) ? "" : baseName;
this.localeID = (localeID == null) ? "" : localeID;
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (!(obj instanceof ReaderCacheKey)) {
return false;
}
ReaderCacheKey info = (ReaderCacheKey)obj;
return this.baseName.equals(info.baseName)
&& this.localeID.equals(info.localeID);
}
@Override
public int hashCode() {
return baseName.hashCode() ^ localeID.hashCode();
}
}
private static class ReaderCache extends SoftCache {
/* (non-Javadoc)
* @see com.ibm.icu.impl.CacheBase#createInstance(java.lang.Object, java.lang.Object)
*/
@Override
protected ICUResourceBundleReader createInstance(ReaderCacheKey key, ClassLoader loader) {
String fullName = ICUResourceBundleReader.getFullName(key.baseName, key.localeID);
try {
ByteBuffer inBytes;
if (key.baseName != null && key.baseName.startsWith(ICUData.ICU_BASE_NAME)) {
String itemPath = fullName.substring(ICUData.ICU_BASE_NAME.length() + 1);
inBytes = ICUBinary.getData(loader, fullName, itemPath);
if (inBytes == null) {
return NULL_READER;
}
} else {
@SuppressWarnings("resource") // Closed by getByteBufferFromInputStreamAndCloseStream().
InputStream stream = ICUData.getStream(loader, fullName);
if (stream == null) {
return NULL_READER;
}
inBytes = ICUBinary.getByteBufferFromInputStreamAndCloseStream(stream);
}
return new ICUResourceBundleReader(inBytes, key.baseName, key.localeID, loader);
} catch (IOException ex) {
throw new ICUUncheckedIOException("Data file " + fullName + " is corrupt - " + ex.getMessage(), ex);
}
}
}
/*
* Default constructor, just used for NULL_READER.
*/
private ICUResourceBundleReader() {
}
private ICUResourceBundleReader(ByteBuffer inBytes,
String baseName, String localeID,
ClassLoader loader) throws IOException {
init(inBytes);
// set pool bundle if necessary
if (usesPoolBundle) {
poolBundleReader = getReader(baseName, "pool", loader);
if (poolBundleReader == null || !poolBundleReader.isPoolBundle) {
throw new IllegalStateException("pool.res is not a pool bundle");
}
if (poolBundleReader.poolCheckSum != poolCheckSum) {
throw new IllegalStateException("pool.res has a different checksum than this bundle");
}
}
}
static ICUResourceBundleReader getReader(String baseName, String localeID, ClassLoader root) {
ReaderCacheKey info = new ReaderCacheKey(baseName, localeID);
ICUResourceBundleReader reader = CACHE.getInstance(info, root);
if (reader == NULL_READER) {
return null;
}
return reader;
}
// See res_init() in ICU4C/source/common/uresdata.c.
private void init(ByteBuffer inBytes) throws IOException {
dataVersion = ICUBinary.readHeader(inBytes, DATA_FORMAT, IS_ACCEPTABLE);
int majorFormatVersion = inBytes.get(16);
bytes = ICUBinary.sliceWithOrder(inBytes);
int dataLength = bytes.remaining();
if(DEBUG) System.out.println("The ByteBuffer is direct (memory-mapped): " + bytes.isDirect());
if(DEBUG) System.out.println("The available bytes in the buffer before reading the data: " + dataLength);
rootRes = bytes.getInt(0);
// Bundles with formatVersion 1.1 and later contain an indexes[] array.
// We need it so that we can read the key string bytes up front, for lookup performance.
// read the variable-length indexes[] array
int indexes0 = getIndexesInt(URES_INDEX_LENGTH);
int indexLength = indexes0 & 0xff;
if(indexLength <= URES_INDEX_MAX_TABLE_LENGTH) {
throw new ICUException("not enough indexes");
}
int bundleTop;
if(dataLength < ((1 + indexLength) << 2) ||
dataLength < ((bundleTop = getIndexesInt(URES_INDEX_BUNDLE_TOP)) << 2)) {
throw new ICUException("not enough bytes");
}
int maxOffset = bundleTop - 1;
if (majorFormatVersion >= 3) {
// In formatVersion 1, the indexLength took up this whole int.
// In version 2, bits 31..8 were reserved and always 0.
// In version 3, they contain bits 23..0 of the poolStringIndexLimit.
// Bits 27..24 are in indexes[URES_INDEX_ATTRIBUTES] bits 15..12.
poolStringIndexLimit = indexes0 >>> 8;
}
if(indexLength > URES_INDEX_ATTRIBUTES) {
// determine if this resource bundle falls back to a parent bundle
// along normal locale ID fallback
int att = getIndexesInt(URES_INDEX_ATTRIBUTES);
noFallback = (att & URES_ATT_NO_FALLBACK) != 0;
isPoolBundle = (att & URES_ATT_IS_POOL_BUNDLE) != 0;
usesPoolBundle = (att & URES_ATT_USES_POOL_BUNDLE) != 0;
poolStringIndexLimit |= (att & 0xf000) << 12; // bits 15..12 -> 27..24
poolStringIndex16Limit = att >>> 16;
}
int keysBottom = 1 + indexLength;
int keysTop = getIndexesInt(URES_INDEX_KEYS_TOP);
if(keysTop > keysBottom) {
// Deserialize the key strings up front.
// Faster table item search at the cost of slower startup and some heap memory.
if(isPoolBundle) {
// Shift the key strings down:
// Pool bundle key strings are used with a 0-based index,
// unlike regular bundles' key strings for which indexes
// are based on the start of the bundle data.
keyBytes = new byte[(keysTop - keysBottom) << 2];
bytes.position(keysBottom << 2);
} else {
localKeyLimit = keysTop << 2;
keyBytes = new byte[localKeyLimit];
}
bytes.get(keyBytes);
}
// Read the array of 16-bit units.
if(indexLength > URES_INDEX_16BIT_TOP) {
int _16BitTop = getIndexesInt(URES_INDEX_16BIT_TOP);
if(_16BitTop > keysTop) {
int num16BitUnits = (_16BitTop - keysTop) * 2;
bytes.position(keysTop << 2);
b16BitUnits = bytes.asCharBuffer();
b16BitUnits.limit(num16BitUnits);
maxOffset |= num16BitUnits - 1;
} else {
b16BitUnits = EMPTY_16_BIT_UNITS;
}
} else {
b16BitUnits = EMPTY_16_BIT_UNITS;
}
if(indexLength > URES_INDEX_POOL_CHECKSUM) {
poolCheckSum = getIndexesInt(URES_INDEX_POOL_CHECKSUM);
}
if(!isPoolBundle || b16BitUnits.length() > 1) {
resourceCache = new ResourceCache(maxOffset);
}
// Reset the position for future .asCharBuffer() etc.
bytes.position(0);
}
private int getIndexesInt(int i) {
return bytes.getInt((1 + i) << 2);
}
VersionInfo getVersion() {
return ICUBinary.getVersionInfoFromCompactInt(dataVersion);
}
int getRootResource() {
return rootRes;
}
boolean getNoFallback() {
return noFallback;
}
boolean getUsesPoolBundle() {
return usesPoolBundle;
}
static int RES_GET_TYPE(int res) {
return res >>> 28;
}
private static int RES_GET_OFFSET(int res) {
return res & 0x0fffffff;
}
private int getResourceByteOffset(int offset) {
return offset << 2;
}
/* get signed and unsigned integer values directly from the Resource handle */
static int RES_GET_INT(int res) {
return (res << 4) >> 4;
}
static int RES_GET_UINT(int res) {
return res & 0x0fffffff;
}
static boolean URES_IS_ARRAY(int type) {
return type == UResourceBundle.ARRAY || type == ICUResourceBundle.ARRAY16;
}
static boolean URES_IS_TABLE(int type) {
return type==UResourceBundle.TABLE || type==ICUResourceBundle.TABLE16 || type==ICUResourceBundle.TABLE32;
}
private static final byte[] emptyBytes = new byte[0];
private static final ByteBuffer emptyByteBuffer = ByteBuffer.allocate(0).asReadOnlyBuffer();
private static final char[] emptyChars = new char[0];
private static final int[] emptyInts = new int[0];
private static final String emptyString = "";
private static final Array EMPTY_ARRAY = new Array();
private static final Table EMPTY_TABLE = new Table();
private char[] getChars(int offset, int count) {
char[] chars = new char[count];
if (count <= 16) {
for(int i = 0; i < count; offset += 2, ++i) {
chars[i] = bytes.getChar(offset);
}
} else {
CharBuffer temp = bytes.asCharBuffer();
temp.position(offset / 2);
temp.get(chars);
}
return chars;
}
private int getInt(int offset) {
return bytes.getInt(offset);
}
private int[] getInts(int offset, int count) {
int[] ints = new int[count];
if (count <= 16) {
for(int i = 0; i < count; offset += 4, ++i) {
ints[i] = bytes.getInt(offset);
}
} else {
IntBuffer temp = bytes.asIntBuffer();
temp.position(offset / 4);
temp.get(ints);
}
return ints;
}
private char[] getTable16KeyOffsets(int offset) {
int length = b16BitUnits.charAt(offset++);
if(length > 0) {
char[] result = new char[length];
if(length <= 16) {
for(int i = 0; i < length; ++i) {
result[i] = b16BitUnits.charAt(offset++);
}
} else {
CharBuffer temp = b16BitUnits.duplicate();
temp.position(offset);
temp.get(result);
}
return result;
} else {
return emptyChars;
}
}
private char[] getTableKeyOffsets(int offset) {
int length = bytes.getChar(offset);
if(length > 0) {
return getChars(offset + 2, length);
} else {
return emptyChars;
}
}
private int[] getTable32KeyOffsets(int offset) {
int length = getInt(offset);
if(length > 0) {
return getInts(offset + 4, length);
} else {
return emptyInts;
}
}
private static String makeKeyStringFromBytes(byte[] keyBytes, int keyOffset) {
int end = keyOffset;
while(keyBytes[end] != 0) {
++end;
}
int len = end - keyOffset;
return new String(keyBytes, keyOffset, len, StandardCharsets.ISO_8859_1);
}
private String getKey16String(int keyOffset) {
if(keyOffset < localKeyLimit) {
return makeKeyStringFromBytes(keyBytes, keyOffset);
} else {
return makeKeyStringFromBytes(poolBundleReader.keyBytes, keyOffset - localKeyLimit);
}
}
private String getKey32String(int keyOffset) {
if(keyOffset >= 0) {
return makeKeyStringFromBytes(keyBytes, keyOffset);
} else {
return makeKeyStringFromBytes(poolBundleReader.keyBytes, keyOffset & 0x7fffffff);
}
}
private void setKeyFromKey16(int keyOffset, UResource.Key key) {
if(keyOffset < localKeyLimit) {
key.setBytes(keyBytes, keyOffset);
} else {
key.setBytes(poolBundleReader.keyBytes, keyOffset - localKeyLimit);
}
}
private void setKeyFromKey32(int keyOffset, UResource.Key key) {
if(keyOffset >= 0) {
key.setBytes(keyBytes, keyOffset);
} else {
key.setBytes(poolBundleReader.keyBytes, keyOffset & 0x7fffffff);
}
}
private int compareKeys(CharSequence key, char keyOffset) {
if(keyOffset < localKeyLimit) {
return ICUBinary.compareKeys(key, keyBytes, keyOffset);
} else {
return ICUBinary.compareKeys(key, poolBundleReader.keyBytes, keyOffset - localKeyLimit);
}
}
private int compareKeys32(CharSequence key, int keyOffset) {
if(keyOffset >= 0) {
return ICUBinary.compareKeys(key, keyBytes, keyOffset);
} else {
return ICUBinary.compareKeys(key, poolBundleReader.keyBytes, keyOffset & 0x7fffffff);
}
}
/**
* @return a string from the local bundle's b16BitUnits at the local offset
*/
String getStringV2(int res) {
// Use the pool bundle's resource cache for pool bundle strings;
// use the local bundle's cache for local strings.
// The cache requires a resource word with the proper type,
// and with an offset that is local to this bundle so that the offset fits
// within the maximum number of bits for which the cache was constructed.
assert RES_GET_TYPE(res) == ICUResourceBundle.STRING_V2;
int offset = RES_GET_OFFSET(res);
assert offset != 0; // handled by the caller
Object value = resourceCache.get(res);
if(value != null) {
return (String)value;
}
String s;
int first = b16BitUnits.charAt(offset);
if((first&0xfffffc00)!=0xdc00) { // C: if(!U16_IS_TRAIL(first)) {
if(first==0) {
return emptyString; // Should not occur, but is not forbidden.
}
StringBuilder sb = new StringBuilder();
sb.append((char)first);
char c;
while((c = b16BitUnits.charAt(++offset)) != 0) {
sb.append(c);
}
s = sb.toString();
} else {
int length;
if(first<0xdfef) {
length=first&0x3ff;
++offset;
} else if(first<0xdfff) {
length=((first-0xdfef)<<16)|b16BitUnits.charAt(offset+1);
offset+=2;
} else {
length=(b16BitUnits.charAt(offset+1)<<16)|b16BitUnits.charAt(offset+2);
offset+=3;
}
// Cast up to CharSequence to insulate against the CharBuffer.subSequence() return type change
// which makes code compiled for a newer JDK (7 and up) not run on an older one (6 and below).
s = ((CharSequence) b16BitUnits).subSequence(offset, offset + length).toString();
}
return (String)resourceCache.putIfAbsent(res, s, s.length() * 2);
}
private String makeStringFromBytes(int offset, int length) {
if (length <= 16) {
StringBuilder sb = new StringBuilder(length);
for (int i = 0; i < length; offset += 2, ++i) {
sb.append(bytes.getChar(offset));
}
return sb.toString();
} else {
CharSequence cs = bytes.asCharBuffer();
offset /= 2;
return cs.subSequence(offset, offset + length).toString();
}
}
String getString(int res) {
int offset=RES_GET_OFFSET(res);
if(res != offset /* RES_GET_TYPE(res) != URES_STRING */ &&
RES_GET_TYPE(res) != ICUResourceBundle.STRING_V2) {
return null;
}
if(offset == 0) {
return emptyString;
}
if (res != offset) { // STRING_V2
if (offset < poolStringIndexLimit) {
return poolBundleReader.getStringV2(res);
} else {
return getStringV2(res - poolStringIndexLimit);
}
}
Object value = resourceCache.get(res);
if(value != null) {
return (String)value;
}
offset=getResourceByteOffset(offset);
int length = getInt(offset);
String s = makeStringFromBytes(offset+4, length);
return (String)resourceCache.putIfAbsent(res, s, s.length() * 2);
}
/**
* CLDR string value "∅∅∅"=="\u2205\u2205\u2205" prevents fallback to the parent bundle.
*/
private boolean isNoInheritanceMarker(int res) {
int offset = RES_GET_OFFSET(res);
if (offset == 0) {
// empty string
} else if (res == offset) {
offset = getResourceByteOffset(offset);
return getInt(offset) == 3 && bytes.getChar(offset + 4) == 0x2205 &&
bytes.getChar(offset + 6) == 0x2205 && bytes.getChar(offset + 8) == 0x2205;
} else if (RES_GET_TYPE(res) == ICUResourceBundle.STRING_V2) {
if (offset < poolStringIndexLimit) {
return poolBundleReader.isStringV2NoInheritanceMarker(offset);
} else {
return isStringV2NoInheritanceMarker(offset - poolStringIndexLimit);
}
}
return false;
}
private boolean isStringV2NoInheritanceMarker(int offset) {
int first = b16BitUnits.charAt(offset);
if (first == 0x2205) { // implicit length
return b16BitUnits.charAt(offset + 1) == 0x2205 &&
b16BitUnits.charAt(offset + 2) == 0x2205 &&
b16BitUnits.charAt(offset + 3) == 0;
} else if (first == 0xdc03) { // explicit length 3 (should not occur)
return b16BitUnits.charAt(offset + 1) == 0x2205 &&
b16BitUnits.charAt(offset + 2) == 0x2205 &&
b16BitUnits.charAt(offset + 3) == 0x2205;
} else {
// Assume that the string has not been stored with more length units than necessary.
return false;
}
}
String getAlias(int res) {
int offset=RES_GET_OFFSET(res);
int length;
if(RES_GET_TYPE(res)==ICUResourceBundle.ALIAS) {
if(offset==0) {
return emptyString;
} else {
Object value = resourceCache.get(res);
if(value != null) {
return (String)value;
}
offset=getResourceByteOffset(offset);
length=getInt(offset);
String s = makeStringFromBytes(offset + 4, length);
return (String)resourceCache.putIfAbsent(res, s, length * 2);
}
} else {
return null;
}
}
byte[] getBinary(int res, byte[] ba) {
int offset=RES_GET_OFFSET(res);
int length;
if(RES_GET_TYPE(res)==UResourceBundle.BINARY) {
if(offset==0) {
return emptyBytes;
} else {
offset=getResourceByteOffset(offset);
length=getInt(offset);
if(length==0) {
return emptyBytes;
}
// Not cached: The array would have to be cloned anyway because
// the cache must not be writable via the returned reference.
if(ba==null || ba.length!=length) {
ba=new byte[length];
}
offset += 4;
if(length <= 16) {
for(int i = 0; i < length; ++i) {
ba[i] = bytes.get(offset++);
}
} else {
ByteBuffer temp = bytes.duplicate();
temp.position(offset);
temp.get(ba);
}
return ba;
}
} else {
return null;
}
}
ByteBuffer getBinary(int res) {
int offset=RES_GET_OFFSET(res);
int length;
if(RES_GET_TYPE(res)==UResourceBundle.BINARY) {
if(offset==0) {
// Don't just
// return emptyByteBuffer;
// in case it matters whether the buffer's mark is defined or undefined.
return emptyByteBuffer.duplicate();
} else {
// Not cached: The returned buffer is small (shares its bytes with the bundle)
// and usually quickly discarded after use.
// Also, even a cached buffer would have to be cloned because it is mutable
// (position & mark).
offset=getResourceByteOffset(offset);
length=getInt(offset);
if(length == 0) {
return emptyByteBuffer.duplicate();
}
offset += 4;
ByteBuffer result = bytes.duplicate();
result.position(offset).limit(offset + length);
result = ICUBinary.sliceWithOrder(result);
if(!result.isReadOnly()) {
result = result.asReadOnlyBuffer();
}
return result;
}
} else {
return null;
}
}
int[] getIntVector(int res) {
int offset=RES_GET_OFFSET(res);
int length;
if(RES_GET_TYPE(res)==UResourceBundle.INT_VECTOR) {
if(offset==0) {
return emptyInts;
} else {
// Not cached: The array would have to be cloned anyway because
// the cache must not be writable via the returned reference.
offset=getResourceByteOffset(offset);
length=getInt(offset);
return getInts(offset+4, length);
}
} else {
return null;
}
}
Array getArray(int res) {
int type=RES_GET_TYPE(res);
if(!URES_IS_ARRAY(type)) {
return null;
}
int offset=RES_GET_OFFSET(res);
if(offset == 0) {
return EMPTY_ARRAY;
}
Object value = resourceCache.get(res);
if(value != null) {
return (Array)value;
}
Array array = (type == UResourceBundle.ARRAY) ?
new Array32(this, offset) : new Array16(this, offset);
return (Array)resourceCache.putIfAbsent(res, array, 0);
}
Table getTable(int res) {
int type = RES_GET_TYPE(res);
if(!URES_IS_TABLE(type)) {
return null;
}
int offset = RES_GET_OFFSET(res);
if(offset == 0) {
return EMPTY_TABLE;
}
Object value = resourceCache.get(res);
if(value != null) {
return (Table)value;
}
Table table;
int size; // Use size = 0 to never use SoftReferences for Tables?
if(type == UResourceBundle.TABLE) {
table = new Table1632(this, offset);
size = table.getSize() * 2;
} else if(type == ICUResourceBundle.TABLE16) {
table = new Table16(this, offset);
size = table.getSize() * 2;
} else /* type == ICUResourceBundle.TABLE32 */ {
table = new Table32(this, offset);
size = table.getSize() * 4;
}
return (Table)resourceCache.putIfAbsent(res, table, size);
}
// ICUResource.Value --------------------------------------------------- ***
/**
* From C++ uresdata.c gPublicTypes[URES_LIMIT].
*/
private static int PUBLIC_TYPES[] = {
UResourceBundle.STRING,
UResourceBundle.BINARY,
UResourceBundle.TABLE,
ICUResourceBundle.ALIAS,
UResourceBundle.TABLE, /* URES_TABLE32 */
UResourceBundle.TABLE, /* URES_TABLE16 */
UResourceBundle.STRING, /* URES_STRING_V2 */
UResourceBundle.INT,
UResourceBundle.ARRAY,
UResourceBundle.ARRAY, /* URES_ARRAY16 */
UResourceBundle.NONE,
UResourceBundle.NONE,
UResourceBundle.NONE,
UResourceBundle.NONE,
UResourceBundle.INT_VECTOR,
UResourceBundle.NONE
};
static class ReaderValue extends UResource.Value {
ICUResourceBundleReader reader;
int res;
@Override
public int getType() {
return PUBLIC_TYPES[RES_GET_TYPE(res)];
}
@Override
public String getString() {
String s = reader.getString(res);
if (s == null) {
throw new UResourceTypeMismatchException("");
}
return s;
}
@Override
public String getAliasString() {
String s = reader.getAlias(res);
if (s == null) {
throw new UResourceTypeMismatchException("");
}
return s;
}
@Override
public int getInt() {
if (RES_GET_TYPE(res) != UResourceBundle.INT) {
throw new UResourceTypeMismatchException("");
}
return RES_GET_INT(res);
}
@Override
public int getUInt() {
if (RES_GET_TYPE(res) != UResourceBundle.INT) {
throw new UResourceTypeMismatchException("");
}
return RES_GET_UINT(res);
}
@Override
public int[] getIntVector() {
int[] iv = reader.getIntVector(res);
if (iv == null) {
throw new UResourceTypeMismatchException("");
}
return iv;
}
@Override
public ByteBuffer getBinary() {
ByteBuffer bb = reader.getBinary(res);
if (bb == null) {
throw new UResourceTypeMismatchException("");
}
return bb;
}
@Override
public com.ibm.icu.impl.UResource.Array getArray() {
Array array = reader.getArray(res);
if (array == null) {
throw new UResourceTypeMismatchException("");
}
return array;
}
@Override
public com.ibm.icu.impl.UResource.Table getTable() {
Table table = reader.getTable(res);
if (table == null) {
throw new UResourceTypeMismatchException("");
}
return table;
}
@Override
public boolean isNoInheritanceMarker() {
return reader.isNoInheritanceMarker(res);
}
@Override
public String[] getStringArray() {
Array array = reader.getArray(res);
if (array == null) {
throw new UResourceTypeMismatchException("");
}
return getStringArray(array);
}
@Override
public String[] getStringArrayOrStringAsArray() {
Array array = reader.getArray(res);
if (array != null) {
return getStringArray(array);
}
String s = reader.getString(res);
if (s != null) {
return new String[] { s };
}
throw new UResourceTypeMismatchException("");
}
@Override
public String getStringOrFirstOfArray() {
String s = reader.getString(res);
if (s != null) {
return s;
}
Array array = reader.getArray(res);
if (array != null && array.size > 0) {
int r = array.getContainerResource(reader, 0);
s = reader.getString(r);
if (s != null) {
return s;
}
}
throw new UResourceTypeMismatchException("");
}
private String[] getStringArray(Array array) {
String[] result = new String[array.size];
for (int i = 0; i < array.size; ++i) {
int r = array.getContainerResource(reader, i);
String s = reader.getString(r);
if (s == null) {
throw new UResourceTypeMismatchException("");
}
result[i] = s;
}
return result;
}
}
// Container value classes --------------------------------------------- ***
static class Container {
protected int size;
protected int itemsOffset;
public final int getSize() {
return size;
}
int getContainerResource(ICUResourceBundleReader reader, int index) {
return ICUResourceBundle.RES_BOGUS;
}
protected int getContainer16Resource(ICUResourceBundleReader reader, int index) {
if (index < 0 || size <= index) {
return ICUResourceBundle.RES_BOGUS;
}
int res16 = reader.b16BitUnits.charAt(itemsOffset + index);
if (res16 < reader.poolStringIndex16Limit) {
// Pool string, nothing to do.
} else {
// Local string, adjust the 16-bit offset to a regular one,
// with a larger pool string index limit.
res16 = res16 - reader.poolStringIndex16Limit + reader.poolStringIndexLimit;
}
return (ICUResourceBundle.STRING_V2 << 28) | res16;
}
protected int getContainer32Resource(ICUResourceBundleReader reader, int index) {
if (index < 0 || size <= index) {
return ICUResourceBundle.RES_BOGUS;
}
return reader.getInt(itemsOffset + 4 * index);
}
int getResource(ICUResourceBundleReader reader, String resKey) {
return getContainerResource(reader, Integer.parseInt(resKey));
}
Container() {
}
}
static class Array extends Container implements UResource.Array {
Array() {}
@Override
public boolean getValue(int i, UResource.Value value) {
if (0 <= i && i < size) {
ReaderValue readerValue = (ReaderValue)value;
readerValue.res = getContainerResource(readerValue.reader, i);
return true;
}
return false;
}
}
private static final class Array32 extends Array {
@Override
int getContainerResource(ICUResourceBundleReader reader, int index) {
return getContainer32Resource(reader, index);
}
Array32(ICUResourceBundleReader reader, int offset) {
offset = reader.getResourceByteOffset(offset);
size = reader.getInt(offset);
itemsOffset = offset + 4;
}
}
private static final class Array16 extends Array {
@Override
int getContainerResource(ICUResourceBundleReader reader, int index) {
return getContainer16Resource(reader, index);
}
Array16(ICUResourceBundleReader reader, int offset) {
size = reader.b16BitUnits.charAt(offset);
itemsOffset = offset + 1;
}
}
static class Table extends Container implements UResource.Table {
protected char[] keyOffsets;
protected int[] key32Offsets;
Table() {
}
String getKey(ICUResourceBundleReader reader, int index) {
if (index < 0 || size <= index) {
return null;
}
return keyOffsets != null ?
reader.getKey16String(keyOffsets[index]) :
reader.getKey32String(key32Offsets[index]);
}
private static final int URESDATA_ITEM_NOT_FOUND = -1;
int findTableItem(ICUResourceBundleReader reader, CharSequence key) {
int mid, start, limit;
int result;
/* do a binary search for the key */
start=0;
limit=size;
while(start>> 1;
if (keyOffsets != null) {
result = reader.compareKeys(key, keyOffsets[mid]);
} else {
result = reader.compareKeys32(key, key32Offsets[mid]);
}
if (result < 0) {
limit = mid;
} else if (result > 0) {
start = mid + 1;
} else {
/* We found it! */
return mid;
}
}
return URESDATA_ITEM_NOT_FOUND; /* not found or table is empty. */
}
@Override
int getResource(ICUResourceBundleReader reader, String resKey) {
return getContainerResource(reader, findTableItem(reader, resKey));
}
@Override
public boolean getKeyAndValue(int i, UResource.Key key, UResource.Value value) {
if (0 <= i && i < size) {
ReaderValue readerValue = (ReaderValue)value;
if (keyOffsets != null) {
readerValue.reader.setKeyFromKey16(keyOffsets[i], key);
} else {
readerValue.reader.setKeyFromKey32(key32Offsets[i], key);
}
readerValue.res = getContainerResource(readerValue.reader, i);
return true;
}
return false;
}
@Override
public boolean findValue(CharSequence key, UResource.Value value) {
ReaderValue readerValue = (ReaderValue)value;
int i = findTableItem(readerValue.reader, key);
if (i >= 0) {
readerValue.res = getContainerResource(readerValue.reader, i);
return true;
} else {
return false;
}
}
}
private static final class Table1632 extends Table {
@Override
int getContainerResource(ICUResourceBundleReader reader, int index) {
return getContainer32Resource(reader, index);
}
Table1632(ICUResourceBundleReader reader, int offset) {
offset = reader.getResourceByteOffset(offset);
keyOffsets = reader.getTableKeyOffsets(offset);
size = keyOffsets.length;
itemsOffset = offset + 2 * ((size + 2) & ~1); // Skip padding for 4-alignment.
}
}
private static final class Table16 extends Table {
@Override
int getContainerResource(ICUResourceBundleReader reader, int index) {
return getContainer16Resource(reader, index);
}
Table16(ICUResourceBundleReader reader, int offset) {
keyOffsets = reader.getTable16KeyOffsets(offset);
size = keyOffsets.length;
itemsOffset = offset + 1 + size;
}
}
private static final class Table32 extends Table {
@Override
int getContainerResource(ICUResourceBundleReader reader, int index) {
return getContainer32Resource(reader, index);
}
Table32(ICUResourceBundleReader reader, int offset) {
offset = reader.getResourceByteOffset(offset);
key32Offsets = reader.getTable32KeyOffsets(offset);
size = key32Offsets.length;
itemsOffset = offset + 4 * (1 + size);
}
}
// Resource cache ------------------------------------------------------ ***
/**
* Cache of some of one resource bundle's resources.
* Avoids creating multiple Java objects for the same resource items,
* including multiple copies of their contents.
*
* Mutable objects must not be cached and then returned to the caller
* because the cache must not be writable via the returned reference.
*
*
Resources are mapped by their resource integers.
* Empty resources with offset 0 cannot be mapped.
* Integers need not and should not be cached.
* Multiple .res items may share resource offsets (genrb eliminates some duplicates).
*
*
This cache uses int[] and Object[] arrays to minimize object creation
* and avoid auto-boxing.
*
*
Large resource objects are usually stored in SoftReferences.
*
*
For few resources, a small table is used with binary search.
* When more resources are cached, then the data structure changes to be faster
* but also use more memory.
*/
private static final class ResourceCache {
// Number of items to be stored in a simple array with binary search and insertion sort.
private static final int SIMPLE_LENGTH = 32;
// When more than SIMPLE_LENGTH items are cached,
// then switch to a trie-like tree of levels with different array lengths.
private static final int ROOT_BITS = 7;
private static final int NEXT_BITS = 6;
// Simple table, used when length >= 0.
private int[] keys = new int[SIMPLE_LENGTH];
private Object[] values = new Object[SIMPLE_LENGTH];
private int length;
// Trie-like tree of levels, used when length < 0.
private int maxOffsetBits;
/**
* Number of bits in each level, each stored in a nibble.
*/
private int levelBitsList;
private Level rootLevel;
private static boolean storeDirectly(int size) {
return size < LARGE_SIZE || CacheValue.futureInstancesWillBeStrong();
}
@SuppressWarnings("unchecked")
private static final Object putIfCleared(Object[] values, int index, Object item, int size) {
Object value = values[index];
if(!(value instanceof SoftReference)) {
// The caller should be consistent for each resource,
// that is, create equivalent objects of equal size every time,
// but the CacheValue "strength" may change over time.
// assert size < LARGE_SIZE;
return value;
}
assert size >= LARGE_SIZE;
value = ((SoftReference