Examples of com.mysema.query.types.Expression

com.mysema.query.types.Expression

Expression defines a general typed expression in a Query instance. The generic type parameter is a reference to the type the expression is bound to.

The central Expression subinterfaces are

{@link Constant} - for constants such as Strings, numbers and entity instances
{@link FactoryExpression} - for row based result processing
{@link Operation} - for common supported operations and function calls
{@link ParamExpression} - for bindable query parameters
{@link Path} - for variables, properties and collection member access
{@link SubQueryExpression} - for subqueries
{@link TemplateExpression} - for custom syntax

@author tiwe @param < T> expression type


    @Test
    @SuppressWarnings("rawtypes")
    public void IndexOf() {        
        Path path = QCat.cat.name;
        Expression startIndex = Expressions.constant(0);
        Expression endIndex = NumberOperation.create(Integer.class, Ops.INDEX_OF, path, Expressions.constant("x"));
        Expression substr = StringOperation.create(Ops.SUBSTR_2ARGS, path, startIndex, endIndex);
        assertToString("substring(cat.name,1,locate(?1,cat.name)-1)", substr);
    }

Examples of com.mysema.query.types.Expression

Related Classes of com.mysema.query.types.Expression