Examples of com.sun.codemodel.JExpression

com.sun.codemodel.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))

                                          ) {
        JType type = f.getRawType();
        String typeName = type.fullName();
        String defaultValue = xmlDefaultValue.value;


        JExpression dv = null;
        
        if ("java.lang.Boolean".equals(typeName) && isElement) {
            dv = JExpr.direct(Boolean.valueOf(defaultValue) ? "Boolean.TRUE" : "Boolean.FALSE");
        } else if ("java.lang.Byte".equals(typeName) && isElement) {
            dv = JExpr._new(type)

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        method = dc.method(mods, mtype, getterName);
        method.javadoc().append(doc);


        JFieldRef fr = JExpr.ref(fieldName);


        JExpression test = JOp.eq(JExpr._null(), fr);
        JConditional jc =  method.body()._if(test);
        jc._then()._return(dvExpr);
        jc._else()._return(fr);
    }

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            method = dc.method(mods, mtype, getterName);
            method.javadoc().append(doc);


            JFieldRef fr = JExpr.ref(fieldName);
            
            JExpression test;
            JConditional jc;
            JInvocation invocation;
                            
            invocation = JExpr.invoke("tryOverwrite");
            invocation.arg(JExpr.dotclass(type.boxify()));

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                if (null == xmlDefaultValue || null == xmlDefaultValue.value) {
                    continue;
                }
                
                JExpression dvExpr = 
                    getDefaultValueExpression(f, co, outline, xsType, isElement, xmlDefaultValue);
                
                if (null == dvExpr) {
                    continue;
                }

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                                          ) {
        JType type = f.getRawType();
        String typeName = type.fullName();
        String defaultValue = xmlDefaultValue.value;


        JExpression dv = null;
        
        if ("java.lang.Boolean".equals(typeName) && isElement) {
            dv = JExpr.direct(Boolean.valueOf(defaultValue) ? "Boolean.TRUE" : "Boolean.FALSE");
        } else if ("java.lang.Byte".equals(typeName) && isElement) {
            dv = JExpr._new(type)

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        method = dc.method(mods, mtype, getterName);
        method.javadoc().append(doc);


        JFieldRef fr = JExpr.ref(fieldName);


        JExpression test = JOp.eq(JExpr._null(), fr);
        JConditional jc =  method.body()._if(test);
        jc._then()._return(dvExpr);
        jc._else()._return(fr);
    }

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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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            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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