io.tracee.contextlogger.outputgenerator.RootOutputElementTreeBuilder Maven / Gradle / Ivy

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Please refer to https://github.com/tracee/contextlogger.

There is a newer version: 0.11.0

package io.tracee.contextlogger.outputgenerator;

import java.util.ArrayList;
import java.util.List;

import io.tracee.contextlogger.outputgenerator.functions.TraceeContextProviderOrderFunction;
import io.tracee.contextlogger.outputgenerator.outputelements.CollectionOutputElement;
import io.tracee.contextlogger.outputgenerator.outputelements.NullValueOutputElement;
import io.tracee.contextlogger.outputgenerator.outputelements.OutputElement;
import io.tracee.contextlogger.profile.ProfileSettings;

/**
 * Converts given instances to an OutputElement instance hierarchy.
 */
public class RootOutputElementTreeBuilder {

    private final RecursiveOutputElementTreeBuilder recursiveOutputElementTreeBuilderImpl;

    /**
     * Hidden constructor.
     */
    protected RootOutputElementTreeBuilder(final RecursiveOutputElementTreeBuilder recursiveOutputElementTreeBuilder) {
        this.recursiveOutputElementTreeBuilderImpl = recursiveOutputElementTreeBuilder;
    }

    protected OutputElement buildOutputElementTreeMain(Object... instances) {

        if (instances == null || instances.length == 0) {

            return NullValueOutputElement.INSTANCE;

        }
        else if (instances.length == 1) {

            OutputElement outputElement = recursiveOutputElementTreeBuilderImpl.convertInstanceRecursively(new RecursiveOutputElementTreeBuilderState(),
                    instances[0]);
            return outputElement != null ? outputElement : NullValueOutputElement.INSTANCE;
        }
        else {

            // must wrap all passed objects inside a complex element
            CollectionOutputElement complexOutputElement = new CollectionOutputElement(Object[].class, instances);

            List outputElementList = new ArrayList();
            for (Object instance : instances) {
                OutputElement outputElement = recursiveOutputElementTreeBuilderImpl.convertInstanceRecursively(
                        new RecursiveOutputElementTreeBuilderState(), instance);
                if (outputElement != null) {
                    outputElementList.add(outputElement);
                }
            }

            // sort by TraceeContextProvider order number if enforced
            if (this.recursiveOutputElementTreeBuilderImpl.getProfileSettings().getToTraceeContextStringRepresentationBuilder().getEnforceOrder()) {
                outputElementList = TraceeContextProviderOrderFunction.getInstance().apply(outputElementList);
            }

            // copy elements to superordinated output element
            for (OutputElement outputElement : outputElementList) {
                complexOutputElement.addElement(outputElement);
            }

            return complexOutputElement;

        }
    }

    public static OutputElement buildOutputElementTree(final ProfileSettings profileSettings, final Object... objects) {
        return new RootOutputElementTreeBuilder(new RecursiveOutputElementTreeBuilderImpl(profileSettings)).buildOutputElementTreeMain(objects);
    }

}