Examples with HashCodeBuilder org.apache.cayenne.util.HashCodeBuilder used on opensource projects

Example 1 with HashCodeBuilder

use of org.apache.cayenne.util.HashCodeBuilder in project cayenne by apache.

the class ObjectId method hashCode.

@Override
public int hashCode() {
    if (this.hashCode == 0) {
        HashCodeBuilder builder = new HashCodeBuilder(3, 5);
        builder.append(entityName.hashCode());
        if (key != null) {
            builder.append(key);
        } else if (singleKey != null) {
            builder.append(singleKey.hashCode());
            // must reconcile all possible numeric types
            if (singleValue instanceof Number) {
                builder.append(((Number) singleValue).longValue());
            } else {
                builder.append(singleValue);
            }
        } else if (objectIdKeys != null) {
            int len = objectIdKeys.size();
            // handle multiple keys - must sort the keys to use with
            // HashCodeBuilder
            String[] keys = objectIdKeys.keySet().toArray(new String[0]);
            Arrays.sort(keys);
            for (int i = 0; i < len; i++) {
                // HashCodeBuilder will take care of processing object if it
                // happens to be a primitive array such as byte[]
                // also we don't have to append the key hashcode, its index
                // will
                // work
                builder.append(i);
                Object value = objectIdKeys.get(keys[i]);
                // must reconcile all possible numeric types
                if (value instanceof Number) {
                    builder.append(((Number) value).longValue());
                } else {
                    builder.append(value);
                }
            }
        }
        this.hashCode = builder.toHashCode();
        assert hashCode != 0 : "Generated zero hashCode";
    }
    return hashCode;
}

Example 2 with HashCodeBuilder

use of org.apache.cayenne.util.HashCodeBuilder in project cayenne by apache.

the class Expression method hashCode.

@Override
public int hashCode() {
    HashCodeBuilder builder = new HashCodeBuilder().append(getType());
    int opCount = getOperandCount();
    for (int i = 0; i < opCount; i++) {
        builder.append(getOperand(i));
    }
    return builder.toHashCode();
}

Example 3 with HashCodeBuilder

use of org.apache.cayenne.util.HashCodeBuilder in project cayenne by apache.

the class DbArcId method hashCode.

@Override
public int hashCode() {
    if (this.hashCode == 0) {
        HashCodeBuilder builder = new HashCodeBuilder(3, 5);
        builder.append(sourceId);
        builder.append(incomingArc.getName());
        this.hashCode = builder.toHashCode();
    }
    return hashCode;
}

Example 4 with HashCodeBuilder

use of org.apache.cayenne.util.HashCodeBuilder in project cayenne by apache.

the class FlattenedArcKey method hashCode.

@Override
public int hashCode() {
    // order ids in array for hashcode consistency purposes. The actual
    // order direction is not important, as long as it
    // is consistent across invocations
    int compare = id1.getSourceId().getEntityName().compareTo(id2.getSourceId().getEntityName());
    if (compare == 0) {
        compare = id1.getIncominArc().getName().compareTo(id2.getIncominArc().getName());
        if (compare == 0) {
            // since ordering is mostly important for detecting equivalent
            // FlattenedArc keys coming from 2 opposite directions, the name
            // of ObjRelationship can be a good criteria
            ObjRelationship or2 = relationship.getReverseRelationship();
            compare = or2 != null ? relationship.getName().compareTo(or2.getName()) : 1;
        // TODO: if(compare == 0) ??
        }
    }
    DbArcId[] ordered;
    if (compare < 0) {
        ordered = new DbArcId[] { id1, id2 };
    } else {
        ordered = new DbArcId[] { id2, id1 };
    }
    return new HashCodeBuilder().append(ordered).toHashCode();
}