| /* |
| * 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.struts2.el; |
| |
| import java.io.Externalizable; |
| import java.io.IOException; |
| import javax.el.ELContext; |
| import javax.el.PropertyNotWritableException; |
| |
| import java.io.ObjectInput; |
| import java.io.ObjectOutput; |
| |
| import javax.el.ValueExpression; |
| |
| import org.apache.struts2.el.lang.ELSupport; |
| import org.apache.struts2.el.util.MessageFactory; |
| import org.apache.struts2.el.util.ReflectionUtil; |
| |
| public final class ValueExpressionLiteral extends ValueExpression implements |
| Externalizable { |
| |
| private static final long serialVersionUID = 1L; |
| |
| private Object value; |
| |
| private Class expectedType; |
| |
| public ValueExpressionLiteral() { |
| super(); |
| } |
| |
| public ValueExpressionLiteral(Object value, Class expectedType) { |
| this.value = value; |
| this.expectedType = expectedType; |
| } |
| |
| public Object getValue(ELContext context) { |
| if (this.expectedType != null) { |
| return ELSupport.coerceToType(this.value, this.expectedType); |
| } |
| return this.value; |
| } |
| |
| public void setValue(ELContext context, Object value) { |
| throw new PropertyNotWritableException(MessageFactory.get( |
| "error.value.literal.write", this.value)); |
| } |
| |
| public boolean isReadOnly(ELContext context) { |
| return true; |
| } |
| |
| public Class getType(ELContext context) { |
| return (this.value != null) ? this.value.getClass() : null; |
| } |
| |
| public Class getExpectedType() { |
| return this.expectedType; |
| } |
| |
| public String getExpressionString() { |
| return (this.value != null) ? this.value.toString() : null; |
| } |
| |
| public boolean equals(Object obj) { |
| return (obj instanceof ValueExpressionLiteral && this |
| .equals((ValueExpressionLiteral) obj)); |
| } |
| |
| public boolean equals(ValueExpressionLiteral ve) { |
| return (ve != null && (this.value != null && ve.value != null && (this.value == ve.value || this.value |
| .equals(ve.value)))); |
| } |
| |
| public int hashCode() { |
| return (this.value != null) ? this.value.hashCode() : 0; |
| } |
| |
| public boolean isLiteralText() { |
| return true; |
| } |
| |
| public void writeExternal(ObjectOutput out) throws IOException { |
| out.writeObject(this.value); |
| out.writeUTF((this.expectedType != null) ? this.expectedType.getName() |
| : ""); |
| } |
| |
| public void readExternal(ObjectInput in) throws IOException, |
| ClassNotFoundException { |
| this.value = in.readObject(); |
| String type = in.readUTF(); |
| if (!"".equals(type)) { |
| this.expectedType = ReflectionUtil.forName(type); |
| } |
| } |
| } |