org.jboss.weld.invokable.TransformerMetadata Maven / Gradle / Ivy

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package org.jboss.weld.invokable;

import org.jboss.weld.exceptions.IllegalStateException;
import org.jboss.weld.util.Preconditions;

public class TransformerMetadata {

    private final Class declaringClass;
    private final String methodName;
    private final TransformerType type;

    public TransformerMetadata(Class declaringClass, String methodName, TransformerType type) {
        Preconditions.checkArgumentNotNull(declaringClass);
        Preconditions.checkArgumentNotNull(methodName);
        Preconditions.checkArgumentNotNull(type);
        this.declaringClass = declaringClass;
        this.methodName = methodName;
        this.type = type;
    }

    public Class getDeclaringClass() {
        return declaringClass;
    }

    public String getMethodName() {
        return methodName;
    }

    public TransformerType getType() {
        return type;
    }

    public boolean isInputTransformer() {
        return type == TransformerType.INSTANCE || type == TransformerType.ARGUMENT;
    }

    public boolean isOutputTransformer() {
        return type == TransformerType.RETURN_VALUE || type == TransformerType.EXCEPTION;
    }

    @Override
    public String toString() {
        String kind = "";
        switch (this.type) {
            case WRAPPER:
                kind = "Invocation wrapper ";
                break;
            case INSTANCE:
                kind = "Target instance transformer ";
                break;
            case ARGUMENT:
                kind = "Argument transformer ";
                break;
            case RETURN_VALUE:
                kind = "Return value transformer ";
                break;
            case EXCEPTION:
                kind = "Exception transformer ";
                break;
            default:
                throw new IllegalStateException("Unknown transformer " + type);
        }
        return kind + declaringClass + "#" + methodName + "()";
    }
}