/*
* 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.
*/
package org.apache.el;
import java.io.Externalizable;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.lang.annotation.Annotation;
import jakarta.el.ELContext;
import jakarta.el.ELException;
import jakarta.el.MethodExpression;
import jakarta.el.MethodInfo;
import jakarta.el.MethodReference;
import org.apache.el.util.MessageFactory;
import org.apache.el.util.ReflectionUtil;
public class MethodExpressionLiteral extends MethodExpression implements Externalizable {
private static final Annotation[] EMPTY_ANNOTATION_ARRAY = new Annotation[0];
private static final Object[] EMPTY_OBJECT_ARRAY = new Object[0];
private Class<?> expectedType;
private String expr;
private Class<?>[] paramTypes;
public MethodExpressionLiteral() {
// do nothing
}
public MethodExpressionLiteral(String expr, Class<?> expectedType, Class<?>[] paramTypes) {
this.expr = expr;
this.expectedType = expectedType;
this.paramTypes = paramTypes;
}
@Override
public MethodInfo getMethodInfo(ELContext context) throws ELException {
context.notifyBeforeEvaluation(getExpressionString());
MethodInfo result = getMethodInfoInternal();
context.notifyAfterEvaluation(getExpressionString());
return result;
}
private MethodInfo getMethodInfoInternal() throws ELException {
return new MethodInfo(this.expr, this.expectedType, this.paramTypes);
}
@Override
public Object invoke(ELContext context, Object[] params) throws ELException {
context.notifyBeforeEvaluation(getExpressionString());
Object result;
if (this.expectedType != null) {
result = context.convertToType(this.expr, this.expectedType);
} else {
result = this.expr;
}
context.notifyAfterEvaluation(getExpressionString());
return result;
}
@Override
public MethodReference getMethodReference(ELContext context) {
if (context == null) {
throw new NullPointerException(MessageFactory.get("error.context.null"));
}
context.notifyBeforeEvaluation(getExpressionString());
MethodReference result =
new MethodReference(null, getMethodInfoInternal(), EMPTY_ANNOTATION_ARRAY, EMPTY_OBJECT_ARRAY);
context.notifyAfterEvaluation(getExpressionString());
return result;
}
@Override
public String getExpressionString() {
return this.expr;
}
@Override
public boolean equals(Object obj) {
return (obj instanceof MethodExpressionLiteral && this.hashCode() == obj.hashCode());
}
@Override
public int hashCode() {
return this.expr.hashCode();
}
@Override
public boolean isLiteralText() {
return true;
}
@Override
public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
this.expr = in.readUTF();
String type = in.readUTF();
if (!type.isEmpty()) {
this.expectedType = ReflectionUtil.forName(type);
}
this.paramTypes = ReflectionUtil.toTypeArray(((String[]) in.readObject()));
}
@Override
public void writeExternal(ObjectOutput out) throws IOException {
out.writeUTF(this.expr);
out.writeUTF((this.expectedType != null) ? this.expectedType.getName() : "");
out.writeObject(ReflectionUtil.toTypeNameArray(this.paramTypes));
}
}