Examples of com.sun.codemodel.internal.JExpression

com.sun.codemodel.internal.JExpression
A Java expression.
Unlike most of CodeModel, JExpressions are built bottom-up ( meaning you start from leaves and then gradually build compliated expressions by combining them.)
{@link JExpression} defines a series of composer methods,which returns a complicated expression (by often taking other {@link JExpression}s as parameters. For example, you can build "5+2" by JExpr.lit(5).add(JExpr.lit(2))

        if(isCollection())  return null;


        if(adapter==null)     return coreType.createConstant(outline, lexical);


        // [RESULT] new Adapter().unmarshal(CONSTANT);
        JExpression cons = coreType.createConstant(outline, lexical);
        Class<? extends XmlAdapter> atype = adapter.getAdapterIfKnown();


        // try to run the adapter now rather than later.
        if(cons instanceof JStringLiteral && atype!=null) {
            JStringLiteral scons = (JStringLiteral) cons;

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            adapter._extends(getCodeModel().ref(XmlAdapter.class).narrow(String.class).narrow(bim));


            JMethod unmarshal = adapter.method(JMod.PUBLIC, bim, "unmarshal");
            JVar $value = unmarshal.param(String.class, "value");


            JExpression inv;


            if( parseMethod.equals("new") ) {
                // "new" indicates that the constructor of the target type
                // will do the unmarshalling.

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        adapter._extends(cm.ref(XmlAdapter.class).narrow(String.class).narrow(inMemoryType));


        JMethod unmarshal = adapter.method(JMod.PUBLIC, inMemoryType, "unmarshal");
        JVar $value = unmarshal.param(String.class, "value");


        JExpression inv;


        if( parseMethod.equals("new") ) {
            // "new" indicates that the constructor of the target type
            // will do the unmarshalling.

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        // we sometimes have to produce (Class)List.class instead of just List.class


        m = objectFactory.method( JMod.PUBLIC, exposedElementType, "create" + ei.getSqueezedName() );
        JVar $value = m.param(exposedType,"value");


        JExpression declaredType;
        if(implType.boxify().isParameterized() || !exposedType.equals(implType))
            declaredType = JExpr.cast(classRef,implType.boxify().dotclass());
        else
            declaredType = implType.boxify().dotclass();
        JExpression scopeClass = scope==null?JExpr._null():scope.dotclass();


        // build up the return extpression
        JInvocation exp = JExpr._new(exposedElementType);
        if(!ei.hasClass()) {
            exp.arg(getQNameInvocation(ei));

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        assert !prop.isCollection();


        JPrimitiveType ptype = implType.boxify().getPrimitiveType();


        // generate the constant
        JExpression defaultValue = null;
        if(prop.defaultValue!=null)
            defaultValue = prop.defaultValue.compute(outline.parent());


        $ref = outline.ref.field(JMod.PUBLIC|JMod.STATIC|JMod.FINAL,
            ptype!=null?ptype:implType, prop.getName(true), defaultValue );

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            cm.ref(JAXBElement.class).narrow(
                target.getContentInMemoryType().toType(parent,Aspect.EXPOSED).boxify()));


        if(ei.hasClass()) {
            JType implType = ei.getContentInMemoryType().toType(parent,Aspect.IMPLEMENTATION);
            JExpression declaredType = JExpr.cast(cm.ref(Class.class),implType.boxify().dotclass()); // why do we have to cast?
            JClass scope=null;
            if(ei.getScope()!=null)
                scope = parent.getClazz(ei.getScope()).implRef;
            JExpression scopeClass = scope==null?JExpr._null():scope.dotclass();
            JFieldVar valField = implClass.field(JMod.PROTECTED|JMod.FINAL|JMod.STATIC,QName.class,"NAME",createQName(cm,ei.getElementName()));


            // take this opportunity to generate a constructor in the element class
            JMethod cons = implClass.constructor(JMod.PUBLIC);
            cons.body().invoke("super")

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            // }
            {
                JMethod m = type.method(JMod.PUBLIC|JMod.STATIC , type, "fromValue" );
                JVar $v = m.param(baseExposedType,"v");
                JForEach fe = m.body().forEach(type,"c", type.staticInvoke("values") );
                JExpression eq;
                if(baseExposedType.isPrimitive())
                    eq = fe.var().ref($value).eq($v);
                else
                    eq = fe.var().ref($value).invoke("equals").arg($v);


                fe.body()._if(eq)._then()._return(fe.var());


                JInvocation ex = JExpr._new(codeModel.ref(IllegalArgumentException.class));


                JExpression strForm;
                if(baseExposedType.isPrimitive()) {
                    strForm = codeModel.ref(String.class).staticInvoke("valueOf").arg($v);
                } else
                if(baseExposedType==codeModel.ref(String.class)){
                    strForm = $v;

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        FieldAccessor acc = core.create(JExpr._this());


        if( generateIsSetMethod ) {
            // [RESULT] boolean isSetXXX()
            JExpression hasSetValue = acc.hasSetValue();
            if( hasSetValue==null ) {
                // this field renderer doesn't support the isSet/unset methods generation.
                // issue an error
                throw new UnsupportedOperationException();
            }

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        //     if(value==null)
        //         return defaultValue;
        // #endif
        //     return value;
        // }
        JExpression defaultValue = null;
        if(prop.defaultValue!=null)
            defaultValue = prop.defaultValue.compute(outline.parent());


        // if Type is a wrapper and we have a default value,
        // we can use the primitive type.

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        if(isCollection())  return null;


        if(adapter==null)     return coreType.createConstant(outline, lexical);


        // [RESULT] new Adapter().unmarshal(CONSTANT);
        JExpression cons = coreType.createConstant(outline, lexical);
        Class<? extends XmlAdapter> atype = adapter.getAdapterIfKnown();


        // try to run the adapter now rather than later.
        if(cons instanceof JStringLiteral && atype!=null) {
            JStringLiteral scons = (JStringLiteral) cons;

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