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TypedProperties: add getStringInfo() to help deal with null strings

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Signed-off-by: Dave Bort <dbort@android.com>
This commit is contained in:
Dave Bort
2009-04-28 18:38:45 -07:00
parent 5b6f8d865d
commit 4b0ebef18d
1 changed files with 28 additions and 0 deletions
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28
core/java/com/android/internal/util/TypedProperties.java
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@@ -683,4 +683,32 @@ public class TypedProperties extends HashMap<String, Object> {
public String getString(String property) {
return getString(property, "");
}
// Values returned by getStringInfo()
public static final int STRING_TYPE_MISMATCH = -2;
public static final int STRING_NOT_SET = -1;
public static final int STRING_NULL = 0;
public static final int STRING_SET = 1;
/**
* Provides string type information about a property.
*
* @param property the property to check
* @return STRING_SET if the property is a string and is non-null.
* STRING_NULL if the property is a string and is null.
* STRING_NOT_SET if the property is not set (no type or value).
* STRING_TYPE_MISMATCH if the property is set but is not a string.
*/
public int getStringInfo(String property) {
Object value = super.get(property);
if (value == null) {
return STRING_NOT_SET;
}
if (value == NULL_STRING) {
return STRING_NULL;
} else if (value instanceof String) {
return STRING_SET;
}
return STRING_TYPE_MISMATCH;
}
}