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package com.sun.el;
import java.io.Externalizable;
import java.io.IOException;
import javax.el.ELContext;
import javax.el.ELException;
import javax.el.PropertyNotWritableException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import javax.el.ValueExpression;
import com.sun.el.lang.ELSupport;
import com.sun.el.util.MessageFactory;
import com.sun.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) {
try {
return ELSupport.coerceToType(this.value, this.expectedType);
} catch (IllegalArgumentException ex) {
throw new ELException(ex);
}
}
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);
}
}
}