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package com.sun.tools.internal.xjc.generator.bean.field;
import com.sun.codemodel.internal.JAssignmentTarget;
import java.util.List;
import com.sun.codemodel.internal.JBlock;
import com.sun.codemodel.internal.JClass;
import com.sun.codemodel.internal.JExpr;
import com.sun.codemodel.internal.JExpression;
import com.sun.codemodel.internal.JForLoop;
import com.sun.codemodel.internal.JMethod;
import com.sun.codemodel.internal.JMod;
import com.sun.codemodel.internal.JOp;
import com.sun.codemodel.internal.JType;
import com.sun.codemodel.internal.JVar;
import com.sun.tools.internal.xjc.generator.bean.ClassOutlineImpl;
import com.sun.tools.internal.xjc.generator.bean.MethodWriter;
import com.sun.tools.internal.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 (kohsuke.kawaguchi@sun.com)
/**
* Realizes a property as an "indexed property"
* as specified in the JAXB spec.
*
* <p>
* We will generate the following set of methods:
* <pre>
* T[] getX();
* T getX( int idx );
* void setX(T[] values);
* void setX( int idx, T value );
* </pre>
*
* We still use List as our back storage.
* This renderer also handles boxing/unboxing if
* T is a boxed type.
*
* @author
* Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com)
*/
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( <var>==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<Object> returnTypes = listPossibleTypes(prop);
writer.javadoc().addReturn().append("array of\n").append(returnTypes);
// [RESULT]
// ET getX(int idx) {
// if( <var>==null ) throw new IndexOutOfBoundsException();
// return unbox(<var>.get(idx));
// }
JMethod $get = writer.declareMethod(exposedType,"get"+prop.getName(true));
$idx = writer.addParameter(codeModel.INT,"idx");
$get.body()._if(acc.ref(true).eq(JExpr._null()))._then()
._throw(JExpr._new(codeModel.ref(IndexOutOfBoundsException.class)));
writer.javadoc().append(prop.javadoc);
$get.body()._return(acc.ref(true).component($idx));
writer.javadoc().addReturn().append("one of\n").append(returnTypes);
// [RESULT] int getXLength() {
// if( <var>==null ) throw new IndexOutOfBoundsException();
// return <ref>.length;
// }
JMethod $getLength = writer.declareMethod(codeModel.INT,"get"+prop.getName(true)+"Length");
$getLength.body()._if(acc.ref(true).eq(JExpr._null()))._then()
._return(JExpr.lit(0));
$getLength.body()._return(acc.ref(true).ref("length"));
// [RESULT] void setX(ET[] values) {
// int len = values.length;
// for( int i=0; i<len; i++ )
// <ref>[i] = values[i];
// }
$setAll = writer.declareMethod(
codeModel.VOID,
"set"+prop.getName(true));
writer.javadoc().append(prop.javadoc);
$value = writer.addParameter(exposedType.array(),"values");
JVar $len = $setAll.body().decl(codeModel.INT,"len", $value.ref("length"));
$setAll.body().assign(
(JAssignmentTarget) acc.ref(true),
castToImplTypeArray(JExpr.newArray(
codeModel.ref(exposedType.erasure().fullName()),
$len)));
JForLoop _for = $setAll.body()._for();
JVar $i = _for.init( codeModel.INT, "i", JExpr.lit(0) );
_for.test( JOp.lt($i,$len) );
_for.update( $i.incr() );
_for.body().assign(acc.ref(true).component($i), castToImplType(acc.box($value.component($i))));
writer.javadoc().addParam($value)
.append("allowed objects are\n")
.append(returnTypes);
// [RESULT] ET setX(int idx, ET value)
// <ref>[idx] = value
JMethod $set = writer.declareMethod(
exposedType,
"set"+prop.getName(true));
$idx = writer.addParameter( codeModel.INT, "idx" );
$value = writer.addParameter( exposedType, "value" );
writer.javadoc().append(prop.javadoc);
body = $set.body();
body._return( JExpr.assign(acc.ref(true).component($idx),
castToImplType(acc.box($value))));
writer.javadoc().addParam($value)
.append("allowed object is\n")
.append(returnTypes);
}
@Override
public JType getRawType() {
return exposedType.array();
}
protected JClass getCoreListType() {
return exposedType.array();
}
public Accessor create(JExpression targetObject) {
return new Accessor(targetObject);
}
Case from AbstractField.exposedType to array of AbstractField.implType . /**
* Case from {@link #exposedType} to array of {@link #implType} .
*/
protected final JExpression castToImplTypeArray( JExpression exp ) {
return JExpr.cast(implType.array(), exp);
}
}