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ICU-6513 Added methods for figuring out if a bundle is an alias and where that alias points.

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X-SVN-Rev: 24586
This commit is contained in:
Brian Rower 2008-09-17 18:26:51 +00:00
parent 026fad3e3b
commit be14ea9919
1 changed files with 195 additions and 1 deletions
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196
icu4j/src/com/ibm/icu/impl/ICUResourceBundle.java
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@ -24,6 +24,7 @@ import java.util.Map;
import java.util.MissingResourceException;
import java.util.ResourceBundle;
import java.util.Set;
import java.util.Vector;
import com.ibm.icu.impl.URLHandler.URLVisitor;
import com.ibm.icu.util.StringTokenizer;
@ -875,7 +876,7 @@ public class ICUResourceBundle extends UResourceBundle {
// %%ALIAS is such a hack!
if (itemKey.equals("%%ALIAS")) {
String locale = b.getString();
String locale = b.getString();
UResourceBundle actual = UResourceBundle.getBundleInstance(baseName, locale);
return (ICUResourceBundleImpl.ResourceTable) actual;
}else{
@ -1226,4 +1227,197 @@ public class ICUResourceBundle extends UResourceBundle {
boolean[] isAlias) {
return null;
}
// TODO Below is a set of workarounds created for org.unicode.cldr.icu.ICU2LDMLWriter
/*
* Calling getKeys() on a table that has alias's can throw a NullPointerException if parent is not set,
* see trac bug: 6514
* -Brian Rower - IBM - Sept. 2008
*/
/**
* Returns the resource handle for the given index within the calling resource table.
*
* @internal
* @deprecated This API is ICU internal only and a workaround see ticket #6514.
* @author Brian Rower
*/
private long getResourceHandle(int index)
{
//TODO this is part of a workaround for ticket #6514
//if it's out of range, return -1
if(index > this.size)
{
return -1;
}
//get the offset of the calling tables resource
int offset = RES_GET_OFFSET(resource);
//move past the 2 byte count number
offset += getCharOffset(1);
//move past the array of 2 byte key string offsets
offset += getCharOffset(size);
//move past the padding if it exists...it's either 2 bytes or no bytes
offset += getCharOffset(~size & 1);
//and then to the proper int in the array of resources
offset += getIntOffset(index);
return (UNSIGNED_INT_MASK) & ICUResourceBundle.getInt(rawData, offset);
}
/**
* Determines if the object at the specified index of the calling resource table
* is an alias. If it is, returns true
*
* @param index The index of the resource to check
* @returns True if the resource at 'index' is an alias, false otherwise.
*
* @internal
* @deprecated This API is ICU internal only and part of a work around see ticket #6514
* @author Brian Rower
*/
public boolean isAlias(int index)
{
//TODO this is part of a workaround for ticket #6514
//if index is out of the resource, return false.
if(index > size)
{
return false;
}
//parent resource must be a table to call this
if(RES_GET_TYPE(this.resource) != TABLE)
{
return false;
}
long res = getResourceHandle(index);
return RES_GET_TYPE(res) == ALIAS ? true : false;
}
/**
*
* @internal
* @deprecated This API is ICU internal only and part of a workaround see ticket #6514.
* @author Brian Rower
*/
public boolean isAlias()
{
//TODO this is part of a workaround for ticket #6514
return RES_GET_TYPE(this.resource) == ALIAS;
}
/**
* Determines if the object with the specified key
* is an alias. If it is, returns true
*
* @param key The key of the resource to check
* @returns True if the resource with 'key' is an alias, false otherwise.
*
* @internal
* @deprecated This API is ICU internal only and part of a workaround see ticket #6514.
* @author Brian Rower
*/
public boolean isAlias(String k)
{
//TODO this is part of a workaround for ticket #6514
//this only applies to tables
if(RES_GET_TYPE(this.resource) != TABLE)
{
return false;
}
int i = getIndexOfKey(k);
if(i > size || i < 0)
{
return false;
}
return isAlias(i);
}
private int getIndexOfKey(String k)
{
//TODO this is part of a workaround for ticket #6514
if(RES_GET_TYPE(this.resource) != TABLE)
{
return -1;
}
int index;
for(index = 0; index < size; index++)
{
String curKey = getKey(index);
if(k.equals(curKey))
{
return index;
}
}
return -1;
}
/**
* This method can be used to retrieve the underlying alias path (aka where the alias points to)
* This method was written to allow conversion from ICU back to LDML format.
*
* @param index
* @return
* @author Brian Rower
* @internal
* @deprecated This API is ICU internal only.
* @author Brian Rower
*/
public String getAliasPath(int index)
{
//TODO cannot allow alias path to to end up in public API
if(!isAlias(index) || index > this.size)
{
return "";
}
return getStringValue(getResourceHandle(index));
}
/**
*
* @internal
* @deprecated This API is ICU internal only
* @author Brian Rower
*/
public String getAliasPath()
{
//TODO cannot allow alias path to to end up in public API
return getStringValue(resource);
}
/**
*
* @internal
* @deprecated This API is ICU internal only
* @author Brian Rower
*/
public String getAliasPath(String k)
{
//TODO cannot allow alias path to to end up in public API
return getAliasPath(getIndexOfKey(k));
}
/*
* Helper method for getKeysSafe
*/
private String getKey(int index)
{
//TODO this is part of a workaround for ticket #6514
if(index > this.size)
{
return "";
}
//the offset of the table
int offset = RES_GET_OFFSET(resource);
//move past the 2 byte number for the count
offset += getCharOffset(1);
//grab the key string offset from the array
offset = getOffset(offset, index);
return RES_GET_KEY(rawData, offset).toString();
}
}