TagMethodExpression.java

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package com.sun.faces.facelets.el;

import javax.el.*;
import javax.faces.view.facelets.TagAttribute;
import java.io.Externalizable;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;

/**
 * 
 * 
 * @author Jacob Hookom
 * @version $Id$
 */
public final class TagMethodExpression extends MethodExpression implements
        Externalizable {
    
    private static final long serialVersionUID = 1L;
    
    private String attr;
    private MethodExpression orig;

    public TagMethodExpression() {
        super();
    }
    
    public TagMethodExpression(TagAttribute attr, MethodExpression orig) {
        this.attr = attr.toString();
        this.orig = orig;
    }

    @Override
    public MethodInfo getMethodInfo(ELContext context) {
        try {
            return this.orig.getMethodInfo(context);
        } catch (PropertyNotFoundException pnfe) {
            throw new PropertyNotFoundException(this.attr + ": " + pnfe.getMessage(), pnfe.getCause());
        } catch (MethodNotFoundException mnfe) {
            throw new MethodNotFoundException(this.attr + ": " + mnfe.getMessage(), mnfe.getCause());
        } catch (ELException e) {
            throw new ELException(this.attr + ": " + e.getMessage(), e.getCause());
        }
    }

    @Override
    public Object invoke(ELContext context, Object[] params) {
        try {
            return this.orig.invoke(context, params);
        } catch (PropertyNotFoundException pnfe) {
            throw new PropertyNotFoundException(this.attr + ": " + pnfe.getMessage(), pnfe.getCause());
        } catch (MethodNotFoundException mnfe) {
            throw new MethodNotFoundException(this.attr + ": " + mnfe.getMessage(), mnfe.getCause());
        } catch (ELException e) {
            throw new ELException(this.attr + ": " + e.getMessage(), e.getCause());
        }
    }

    @Override
    public String getExpressionString() {
        return this.orig.getExpressionString();
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }

        TagMethodExpression that = (TagMethodExpression) o;

        if (attr != null ? !attr.equals(that.attr) : that.attr != null) {
            return false;
        }
        if (orig != null ? !orig.equals(that.orig) : that.orig != null) {
            return false;
        }

        return true;
    }

    @Override
    public int hashCode() {
        int result = attr != null ? attr.hashCode() : 0;
        result = 31 * result + (orig != null ? orig.hashCode() : 0);
        return result;
    }

    @Override
    public boolean isLiteralText() {
        return this.orig.isLiteralText();
    }

    @Override
    public void writeExternal(ObjectOutput out) throws IOException {
        out.writeObject(this.orig);
        out.writeUTF(this.attr);
    }

    @Override
    public void readExternal(ObjectInput in) throws IOException,
            ClassNotFoundException {
        this.orig = (MethodExpression) in.readObject();
        this.attr = in.readUTF();
    }

    @Override
    public String toString() {
        return this.attr + ": " + this.orig;
    }
}