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MessageHeaders now copies the Map passed into its constructor to enforce immutability of the Map itself (note: mutability of the values in the Map is intentionally left as a development decision). The clear() method now correctly throws UnsupportedOperationException along with the other Map methods that would otherwise be capable of modifying the Map (INT-427).

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This commit is contained in:
Mark Fisher
2008-10-15 19:38:53 +00:00
parent 8a8e2b035c
commit 905f76116f
1 changed files with 8 additions and 7 deletions
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15
org.springframework.integration/src/main/java/org/springframework/integration/core/MessageHeaders.java
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@@ -55,8 +55,9 @@ public final class MessageHeaders implements Map<String, Object>, Serializable {
public MessageHeaders(Map<String, Object> headers) {
this.headers = (headers != null ? headers
: new HashMap<String, Object>());
this.headers = (headers != null)
? new HashMap<String, Object>(headers)
: new HashMap<String, Object>();
this.headers.put(ID, UUID.randomUUID());
this.headers.put(TIMESTAMP, new Long(System.currentTimeMillis()));
}
@@ -112,7 +113,7 @@ public final class MessageHeaders implements Map<String, Object>, Serializable {
}
public int hashCode() {
return headers.hashCode();
return this.headers.hashCode();
}
public boolean equals(Object obj) {
@@ -134,10 +135,6 @@ public final class MessageHeaders implements Map<String, Object>, Serializable {
* Map implementation
*/
public void clear() {
this.headers.clear();
}
public boolean containsKey(Object key) {
return this.headers.containsKey(key);
}
@@ -186,4 +183,8 @@ public final class MessageHeaders implements Map<String, Object>, Serializable {
throw new UnsupportedOperationException("MessageHeaders is immutable.");
}
public void clear() {
throw new UnsupportedOperationException("MessageHeaders is immutable.");
}
}