struts2-uel-plugin/src/main/java/org/apache/struts2/uelplugin/reflection/DefaultMemberAccess.java

package org.apache.struts2.uelplugin.reflection;

import java.util.Map;
import java.lang.reflect.Member;
import java.lang.reflect.AccessibleObject;
import java.lang.reflect.Modifier;


/**
 * Taken from OGNL
 */
public class DefaultMemberAccess implements MemberAccess
{
    public boolean      allowPrivateAccess = false;
    public boolean      allowProtectedAccess = false;
    public boolean      allowPackageProtectedAccess = false;

	/*===================================================================
		Constructors
	  ===================================================================*/
	public DefaultMemberAccess(boolean allowAllAccess)
	{
	    this(allowAllAccess, allowAllAccess, allowAllAccess);
	}

	public DefaultMemberAccess(boolean allowPrivateAccess, boolean allowProtectedAccess, boolean allowPackageProtectedAccess)
	{
	    super();
	    this.allowPrivateAccess = allowPrivateAccess;
	    this.allowProtectedAccess = allowProtectedAccess;
	    this.allowPackageProtectedAccess = allowPackageProtectedAccess;
	}

	/*===================================================================
		Public methods
	  ===================================================================*/
	public boolean getAllowPrivateAccess()
	{
	    return allowPrivateAccess;
	}

	public void setAllowPrivateAccess(boolean value)
	{
	    allowPrivateAccess = value;
	}

	public boolean getAllowProtectedAccess()
	{
	    return allowProtectedAccess;
	}

	public void setAllowProtectedAccess(boolean value)
	{
	    allowProtectedAccess = value;
	}

	public boolean getAllowPackageProtectedAccess()
	{
	    return allowPackageProtectedAccess;
	}

	public void setAllowPackageProtectedAccess(boolean value)
	{
	    allowPackageProtectedAccess = value;
	}

	/*===================================================================
		MemberAccess interface
	  ===================================================================*/
    public Object setup(Map context, Object target, Member member, String propertyName)
    {
        Object      result = null;

        if (isAccessible(context, target, member, propertyName)) {
            AccessibleObject accessible = (AccessibleObject)member;

            if (!accessible.isAccessible()) {
                result = Boolean.TRUE;
                accessible.setAccessible(true);
            }
        }
        return result;
    }

    public void restore(Map context, Object target, Member member, String propertyName, Object state)
    {
        if (state != null) {
            ((AccessibleObject)member).setAccessible(((Boolean)state).booleanValue());
        }
    }

    /**
        Returns true if the given member is accessible or can be made accessible
        by this object.
     */
	public boolean isAccessible(Map context, Object target, Member member, String propertyName)
	{
	    int         modifiers = member.getModifiers();
	    boolean     result = Modifier.isPublic(modifiers);

	    if (!result) {
	        if (Modifier.isPrivate(modifiers)) {
	            result = getAllowPrivateAccess();
	        } else {
	            if (Modifier.isProtected(modifiers)) {
	                result = getAllowProtectedAccess();
	            } else {
	                result = getAllowPackageProtectedAccess();
	            }
	        }
	    }
	    return result;
	}
}