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 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
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 * or LICENSE.txt.  See the License for the specific
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package com.sun.tools.xjc.generator.bean.field;

import com.sun.codemodel.JAssignmentTarget;
import java.util.List;
import com.sun.codemodel.JBlock;
import com.sun.codemodel.JClass;
import com.sun.codemodel.JExpr;
import com.sun.codemodel.JExpression;
import com.sun.codemodel.JForLoop;
import com.sun.codemodel.JMethod;
import com.sun.codemodel.JMod;
import com.sun.codemodel.JOp;
import com.sun.codemodel.JType;
import com.sun.codemodel.JVar;
import com.sun.tools.xjc.generator.bean.ClassOutlineImpl;
import com.sun.tools.xjc.generator.bean.MethodWriter;
import com.sun.tools.xjc.model.CPropertyInfo;

/**
 * Realizes a property as an "indexed property"
 * as specified in the JAXB spec.
 * 
 * 
 * We will generate the following set of methods:
 * 
 * T[] getX();
 * T getX( int idx );
 * void setX(T[] values);
 * void setX( int idx, T value );
 * 
 * 
 * We still use List as our back storage.
 * This renderer also handles boxing/unboxing if
 * T is a boxed type.
 * 
 * @author
 *     Kohsuke Kawaguchi ([email protected])
 */
final class ArrayField extends AbstractListField {
    
    class Accessor extends AbstractListField.Accessor {
        protected Accessor( JExpression $target ) {
            super($target);
        }
        
        public void toRawValue(JBlock block, JVar $var) {
            block.assign($var,$target.invoke($getAll));
        }

        public void fromRawValue(JBlock block, String uniqueName, JExpression $var) {
            block.invoke($target,$setAll).arg($var);
        }
        
        @Override
        public JExpression hasSetValue() {
            return field.ne(JExpr._null()).cand(field.ref("length").gt(JExpr.lit(0)));
        }
        
    }
    
    private JMethod $setAll;
    
    private JMethod $getAll;
    
    ArrayField(ClassOutlineImpl context, CPropertyInfo prop) {
        super(context,prop,false);
        generateArray();
    }
    
    protected final void generateArray() {
        field = outline.implClass.field( JMod.PROTECTED, getCoreListType(), prop.getName(false) );
        annotate(field);

        // generate the rest of accessors
        generateAccessors();
    }
    
    public void generateAccessors() {
        
        MethodWriter writer = outline.createMethodWriter();
        Accessor acc = create(JExpr._this());
        JVar $idx,$value; JBlock body;

        // [RESULT] T[] getX() {
        //     if( ==null )    return new T[0];
        //     T[] retVal = new T[this._return.length] ;
        //     System.arraycopy(this._return, 0, "retVal", 0, this._return.length);
        //     return (retVal);
        // }
        $getAll = writer.declareMethod( exposedType.array(),"get"+prop.getName(true));
        writer.javadoc().append(prop.javadoc);
        body = $getAll.body();

        body._if( acc.ref(true).eq(JExpr._null()) )._then()
            ._return(JExpr.newArray(exposedType,0));
        JVar var = body.decl(exposedType.array(), "retVal", JExpr.newArray(implType,acc.ref(true).ref("length")));
        body.add(codeModel.ref(System.class).staticInvoke("arraycopy")
                        .arg(acc.ref(true)).arg(JExpr.lit(0))
                        .arg(var)
                        .arg(JExpr.lit(0)).arg(acc.ref(true).ref("length")));
        body._return(JExpr.direct("retVal"));

        List