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rewrote comment to reflect that this key is not

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only used for virtual and groupby nodes, but
also for nodes accessed via a property name
This commit is contained in:
hns 2001-08-05 19:23:22 +00:00
parent 889ab2dfcb
commit 8471241a88
1 changed files with 6 additions and 8 deletions
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14
src/helma/objectmodel/SyntheticKey.java
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@ -6,16 +6,15 @@ package helma.objectmodel;
import java.io.Serializable;
/**
* This is the internal key for an object that is not stored in a db, but generated
* on the fly. Currently there are two kinds of such objects: virtual nodes, which are used
* as utility containers for objects in the database, and groupby nodes, which are used
* to group a certain kind of relational objects according to some property.
* This is the internal key for an object that is not - or not directly - fetched from a db,
* but derived from another object. This is useful for all kinds of object accessed via a
* symbolic name from another object, like objects mounted via a property name column,
* virtual nodes and groupby nodes.
*/
public final class SyntheticKey implements Key, Serializable {
private final Key parentKey;
private final String name;
// private final int hash;
/**
@ -24,23 +23,22 @@ public final class SyntheticKey implements Key, Serializable {
public SyntheticKey (Key key, String name) {
this.parentKey = key;
this.name = name;
// hash = name.hashCode () + key.hashCode ();
}
public boolean equals (Object what) {
if (what == this)
return true;
try {
SyntheticKey k = (SyntheticKey) what;
return parentKey.equals (k.parentKey) &&
(name == k.name || name.equals (k.name));
} catch (Exception x) {
System.err.println ("SYNTHETIC NOT EQUAL: "+what+" - "+this);
return false;
}
}
public int hashCode () {
// return hash;
return name.hashCode () + parentKey.hashCode ();
}