Examples of InheritancePolicy

oracle.toplink.essentials.descriptors.InheritancePolicy

Purpose: Allows customization of an object's inheritance. The primary supported inheritance model uses a class type indicator column in the table that stores the object's class type. The class-to-type mapping is specified on this policy. The full class name can also be used for the indicator instead of the mapping.

Each subclass can either share their parents table, or in addition add their own table(s).

For legacy models a customized inheritance class-extractor can be provided. This allows Java code to be used to compute the class type to use for a row. When this customized inheritance model is used an only-instances and with-all-subclasses filter expression may be required for concrete and branch querying.

org.eclipse.persistence.descriptors.InheritancePolicy

Each subclass can either share their parents table, or in addition add their own table(s).

        // Check for multiple table inheritance which may require multiple queries.
        if (!getDescriptor().hasInheritance() || !getDescriptor().getInheritancePolicy().requiresMultipleTableSubclassRead()){
            setSQLStatement(buildNormalSelectStatement());
            super.prepareSelectOneRow();
        } else {
            InheritancePolicy policy = getDescriptor().getInheritancePolicy();
            if (policy.hasView()){
                // CR#3158703 if the descriptor has a view, then it requires a single select,
                // so can be prepared.
                setSQLStatement(getDescriptor().getInheritancePolicy().buildViewSelectStatement((ObjectLevelReadQuery)getQuery()));
                super.prepareSelectOneRow();
            } else if ( ((ObjectLevelReadQuery)getQuery()).shouldOuterJoinSubclasses() ){

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Examples of InheritancePolicy

Examples of org.eclipse.persistence.descriptors.InheritancePolicy