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andresperez Method is not visible (problem with inheritance)
Hi,
I am having a problem with inheritance. I am not sure what I am doing wrong... please help.
I have an abstract class that looks like this:
public abstract class TokenHandlerAbstract {
protected Pattern p = null;
public Boolean isValid(String testString, TPParams params) {
Pattern p = getPattern();
return isPatternMatch(p, testString);
}
protected virtual Pattern getPattern() {
String regexp = functionName + '(.*)';
if ((p == null) || (p.pattern() != regexp)) {
p = Pattern.compile(regexp);
}
return p;
}
}
protected Pattern p = null;
public Boolean isValid(String testString, TPParams params) {
Pattern p = getPattern();
return isPatternMatch(p, testString);
}
protected virtual Pattern getPattern() {
String regexp = functionName + '(.*)';
if ((p == null) || (p.pattern() != regexp)) {
p = Pattern.compile(regexp);
}
return p;
}
}
This class is extended with a class that looks like this:
public class TokenHandlerString extends TokenHandlerAbstract {
protected override Pattern getPattern() {
// Anything surrounded by single quotes
String regexp = '\'.*\'';
if ((p == null) || (p.pattern() != regexp)) {
p = Pattern.compile(regexp);
}
return p;
}
}
protected override Pattern getPattern() {
// Anything surrounded by single quotes
String regexp = '\'.*\'';
if ((p == null) || (p.pattern() != regexp)) {
p = Pattern.compile(regexp);
}
return p;
}
}
These classes get called from a third class that looks like this:
public class TokenValueFinder {
private TokenHandlerString thString = new TokenHandlerString();
public String findValue(String testString, TPParams params) {
if (thString.isValid(testString, params)) {
...
}
}
}
private TokenHandlerString thString = new TokenHandlerString();
public String findValue(String testString, TPParams params) {
if (thString.isValid(testString, params)) {
...
}
}
}
When I view the page I get this error:
System.TypeException: Method is not visible: [TokenHandlerString].getPattern()
Class.TokenHandlerAbstract.isValid: line 7, column 21
Class.TokenValueFinder.findValue: line 31, column 20
Class.TPTextParser2.privateParse: line 35, column 31
Class.TPTextParser2.Parse: line 15, column 9
Class.TPResolved2.getTemplateResolved: line 198, column 28
External entry point
Class.TokenHandlerAbstract.isValid: line 7, column 21
Class.TokenValueFinder.findValue: line 31, column 20
Class.TPTextParser2.privateParse: line 35, column 31
Class.TPTextParser2.Parse: line 15, column 9
Class.TPResolved2.getTemplateResolved: line 198, column 28
External entry point
If I change the visibility of getPattern() from protected to public, the error goes away. But why?
I understand that isValid()has to be public because I am calling the method from a different class. But getPattern() is being called from the same class or one that inherits from it.
Thanks
Andres Perez
public abstract class AbstractBaseClass { public void publicMethod() { System.debug('Public method, calling protected method'); protectedMethod(); System.debug('Protected method call worked'); } protected virtual void protectedMethod() { System.debug('In base class protected method'); } } public class Subclass extends AbstractBaseClass { protected override void protectedMethod() { System.debug('In subclass protected method'); } } public class CallingClass { private Subclass instance = new Subclass(); public CallingClass() { instance.publicMethod(); } } new CallingClass();