TypedProperties: add getStringInfo() to help deal with null strings (4b0ebef1) · Commits · e / os / android_frameworks_base

core/java/com/android/internal/util/TypedProperties.java

+28 −0

Original line number	Diff line number	Diff line
		@@ -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;
		}
		}