AnyNotNullLmlMacroTag.java

package com.github.czyzby.lml.parser.impl.tag.macro;

import com.github.czyzby.kiwi.util.common.Strings;
import com.github.czyzby.kiwi.util.gdx.collection.GdxArrays;
import com.github.czyzby.lml.parser.LmlParser;
import com.github.czyzby.lml.parser.tag.LmlTag;

/** Checks if any of the passed arguments is not null or boolean false. Evaluates to false if no non-null value is found
 * or receives 0 attributes.
 *
 * @author MJ */
public class AnyNotNullLmlMacroTag extends AbstractConditionalLmlMacroTag {
    public AnyNotNullLmlMacroTag(final LmlParser parser, final LmlTag parentTag, final StringBuilder rawTagData) {
        super(parser, parentTag, rawTagData);
    }

    @Override
    protected boolean checkCondition() {
        if (GdxArrays.isEmpty(getAttributes())) {
            // No arguments - this might happen even if the macro was properly invoked - with an argument that returns
            // empty string, for example. Assuming that no params = received null.
            return false;
        } else if (hasAttribute(TEST_ATTRIBUTE)) {
            for (final String attribute : Strings.split(getAttribute(TEST_ATTRIBUTE), ' ')) {
                if (testAttribute(attribute)) {
                    return true;
                }
            }
        } else {
            for (final String attribute : getAttributes()) {
                if (testAttribute(attribute)) {
                    return true;
                }
            }
        }
        return false;
    }

    /** @param attribute will be tested.
     * @return true if attribute is considered blank. */
    protected boolean testAttribute(final String attribute) {
        if (isAction(attribute)) {
            final Object result = invokeAction(attribute);
            if (!isNullOrFalse(result)) {
                // Method result not empty or "false".
                return true;
            }
        }
        if (!isNullOrFalse(attribute)) {
            // Attribute is not blank, not equals "null" or "false" - assuming the attribute is valid.
            return true;
        }
        return false;
    }
}