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Account for a null attributes object 

* field attributesCanBeModified - a null attributes object can't be modified in its current state
* method makeAttributesModifiable() - initialize a null attributes object to empty
This commit is contained in:
Joel Thibault 2012-06-22 16:56:04 -04:00
parent d0cf8bcc80
commit f0c54d99ed
1 changed files with 8 additions and 1 deletions
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7
public/java/src/org/broadinstitute/sting/utils/variantcontext/VariantContextBuilder.java
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@ -182,7 +182,13 @@ public class VariantContextBuilder {
* @param attributes * @param attributes
*/ */
public VariantContextBuilder attributes(final Map<String, Object> attributes) { public VariantContextBuilder attributes(final Map<String, Object> attributes) {
if (attributes != null) {
this.attributes = attributes; this.attributes = attributes;
}
else {
this.attributes = new HashMap<String, Object>();
}
this.attributesCanBeModified = true; this.attributesCanBeModified = true;
return this; return this;
} }
@ -220,6 +226,7 @@ public class VariantContextBuilder {
* Makes the attributes field modifiable. In many cases attributes is just a pointer to an immutable * Makes the attributes field modifiable. In many cases attributes is just a pointer to an immutable
* collection, so methods that want to add / remove records require the attributes to be copied to a * collection, so methods that want to add / remove records require the attributes to be copied to a
*/ */
@Ensures({"this.attributesCanBeModified"})
private void makeAttributesModifiable() { private void makeAttributesModifiable() {
if ( ! attributesCanBeModified ) { if ( ! attributesCanBeModified ) {
this.attributesCanBeModified = true; this.attributesCanBeModified = true;