/*
* Licensed to the Apache Software Foundation ( ASF ) under one or more
* contributor license agreements . See the NOTICE file distributed with
* this work for additional information regarding copyright ownership .
* The ASF licenses this file to You under the Apache License , Version 2 . 0
* ( the " License " ) ; you may not use this file except in compliance with
* the License . You may obtain a copy of the License at
*
* http : //www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing , software
* distributed under the License is distributed on an " AS IS " BASIS ,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND , either express or implied .
* See the License for the specific language governing permissions and
* limitations under the License .
*/
/* Generated By:JJTree: Do not edit this line. AstIdentifier.java */
package org.apache.el.parser;
import jakarta.el.ELClass;
import jakarta.el.ELException;
import jakarta.el.MethodExpression;
import jakarta.el.MethodInfo;
import jakarta.el.MethodNotFoundException;
import jakarta.el.MethodReference;
import jakarta.el.PropertyNotFoundException;
import jakarta.el.ValueExpression;
import jakarta.el.ValueReference;
import jakarta.el.VariableMapper;
import org.apache.el.lang.EvaluationContext;
import org.apache.el.util.MessageFactory;
import org.apache.el.util.Validation;
/**
* @ author Jacob Hookom [ jacob @ hookom . net ]
*/
public final class AstIdentifier extends SimpleNode {
public AstIdentifier(int id) {
super (id);
}
@Override
public Class <?> getType(EvaluationContext ctx) throws ELException {
VariableMapper varMapper = ctx.getVariableMapper();
if (varMapper != null ) {
ValueExpression expr = varMapper.resolveVariable(this .image);
if (expr != null ) {
return expr.getType(ctx.getELContext());
}
}
ctx.setPropertyResolved(false );
Class <?> result = ctx.getELResolver().getType(ctx, null , this .image);
if (!ctx.isPropertyResolved()) {
throw new PropertyNotFoundException(MessageFactory.get(
"error.resolver.unhandled.null" , this .image));
}
return result;
}
@Override
public Object getValue(EvaluationContext ctx) throws ELException {
// Lambda parameters
if (ctx.isLambdaArgument(this .image)) {
return ctx.getLambdaArgument(this .image);
}
// Variable mapper
VariableMapper varMapper = ctx.getVariableMapper();
if (varMapper != null ) {
ValueExpression expr = varMapper.resolveVariable(this .image);
if (expr != null ) {
return expr.getValue(ctx.getELContext());
}
}
// EL Resolvers
ctx.setPropertyResolved(false );
Object result;
/* Putting the Boolean into the ELContext is part of a performance
* optimisation for ScopedAttributeELResolver . When looking up " foo " ,
* the resolver can ' t differentiate between $ { foo } and $ { foo . bar } .
* This is important because the expensive class lookup only needs to
* be performed in the later case . This flag tells the resolver if the
* lookup can be skipped .
*/
if (parent instanceof AstValue) {
ctx.putContext(this .getClass(), Boolean .FALSE );
} else {
ctx.putContext(this .getClass(), Boolean .TRUE );
}
try {
result = ctx.getELResolver().getValue(ctx, null , this .image);
} finally {
// Always reset the flag to false so the optimisation is not applied
// inappropriately
ctx.putContext(this .getClass(), Boolean .FALSE );
}
if (ctx.isPropertyResolved()) {
return result;
}
// Import
result = ctx.getImportHandler().resolveClass(this .image);
if (result != null ) {
return new ELClass((Class <?>) result);
}
result = ctx.getImportHandler().resolveStatic(this .image);
if (result != null ) {
try {
return ((Class <?>) result).getField(this .image).get(null );
} catch (IllegalArgumentException | IllegalAccessException
| NoSuchFieldException | SecurityException e) {
throw new ELException(e);
}
}
throw new PropertyNotFoundException(MessageFactory.get(
"error.resolver.unhandled.null" , this .image));
}
@Override
public boolean isReadOnly(EvaluationContext ctx) throws ELException {
VariableMapper varMapper = ctx.getVariableMapper();
if (varMapper != null ) {
ValueExpression expr = varMapper.resolveVariable(this .image);
if (expr != null ) {
return expr.isReadOnly(ctx.getELContext());
}
}
ctx.setPropertyResolved(false );
boolean result = ctx.getELResolver().isReadOnly(ctx, null , this .image);
if (!ctx.isPropertyResolved()) {
throw new PropertyNotFoundException(MessageFactory.get(
"error.resolver.unhandled.null" , this .image));
}
return result;
}
@Override
public void setValue(EvaluationContext ctx, Object value)
throws ELException {
VariableMapper varMapper = ctx.getVariableMapper();
if (varMapper != null ) {
ValueExpression expr = varMapper.resolveVariable(this .image);
if (expr != null ) {
expr.setValue(ctx.getELContext(), value);
return ;
}
}
ctx.setPropertyResolved(false );
ctx.getELResolver().setValue(ctx, null , this .image, value);
if (!ctx.isPropertyResolved()) {
throw new PropertyNotFoundException(MessageFactory.get(
"error.resolver.unhandled.null" , this .image));
}
}
@Override
public Object invoke(EvaluationContext ctx, Class <?>[] paramTypes,
Object[] paramValues) throws ELException {
return this .getMethodExpression(ctx).invoke(ctx.getELContext(), paramValues);
}
@Override
public MethodInfo getMethodInfo(EvaluationContext ctx,
Class <?>[] paramTypes) throws ELException {
return this .getMethodExpression(ctx).getMethodInfo(ctx.getELContext());
}
@Override
public MethodReference getMethodReference(EvaluationContext ctx) {
return this .getMethodExpression(ctx).getMethodReference(ctx.getELContext());
}
@Override
public void setImage(String image) {
if (!Validation.isIdentifier(image)) {
throw new ELException(MessageFactory.get("error.identifier.notjava" ,
image));
}
this .image = image;
}
@Override
public ValueReference getValueReference(EvaluationContext ctx) {
VariableMapper varMapper = ctx.getVariableMapper();
if (varMapper == null ) {
return null ;
}
ValueExpression expr = varMapper.resolveVariable(this .image);
if (expr == null ) {
return null ;
}
return expr.getValueReference(ctx);
}
private MethodExpression getMethodExpression(EvaluationContext ctx)
throws ELException {
Object obj = null ;
// case A: ValueExpression exists, getValue which must
// be a MethodExpression
VariableMapper varMapper = ctx.getVariableMapper();
ValueExpression ve = null ;
if (varMapper != null ) {
ve = varMapper.resolveVariable(this .image);
if (ve != null ) {
obj = ve.getValue(ctx);
}
}
// case B: evaluate the identity against the ELResolver, again, must be
// a MethodExpression to be able to invoke
if (ve == null ) {
ctx.setPropertyResolved(false );
obj = ctx.getELResolver().getValue(ctx, null , this .image);
}
// finally provide helpful hints
if (obj instanceof MethodExpression) {
return (MethodExpression) obj;
} else if (obj == null ) {
throw new MethodNotFoundException(MessageFactory.get("error.identifier.noMethod" , this .image));
} else {
throw new ELException(MessageFactory.get("error.identifier.notMethodExpression" , this .image, obj.getClass().getName()));
}
}
}
Messung V0.5 in Prozent C=98 H=92 G=94
¤ Dauer der Verarbeitung: 0.6 Sekunden
¤
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