Jackson is "the Java JSON library" or "the best JSON parser for Java". Or simply as "JSON for Java".

Jackson Annotations Source Code files are provided in the source packge (jackson-annotations-2.12.4-sources.jar). You can download it at Jackson Maven Website.

You can also browse Jackson Annotations Source Code below:

⏎ com/fasterxml/jackson/databind/util/ViewMatcher.java

package com.fasterxml.jackson.databind.util;

/**
 * Helper class used for checking whether a property is visible
 * in the active view
 */
public class ViewMatcher implements java.io.Serializable
{
    private static final long serialVersionUID = 1L;

    protected final static ViewMatcher EMPTY = new ViewMatcher();
    
    public boolean isVisibleForView(Class<?> activeView) { return false; }

    public static ViewMatcher construct(Class<?>[] views)
    {
        if (views == null) {
            return EMPTY;
        }
        switch (views.length) {
        case 0:
            return EMPTY;
        case 1:
            return new Single(views[0]);
        }
        return new Multi(views);
    } 
    
    /*
    /**********************************************************
    /* Concrete sub-classes
    /**********************************************************
     */

    private final static class Single extends ViewMatcher
    {
        private static final long serialVersionUID = 1L;

        private final Class<?> _view;
        public Single(Class<?> v) { _view = v; }
        @Override
        public boolean isVisibleForView(Class<?> activeView) {
            return (activeView == _view) || _view.isAssignableFrom(activeView);
        }
    }

    private final static class Multi extends ViewMatcher
        implements java.io.Serializable
    {
        private static final long serialVersionUID = 1L;

        private final Class<?>[] _views;

        public Multi(Class<?>[] v) { _views = v; }

        @Override
        public boolean isVisibleForView(Class<?> activeView)
        {
            for (int i = 0, len = _views.length; i < len; ++i) {
                Class<?> view = _views[i];
                if ((activeView == view) || view.isAssignableFrom(activeView)) {
                    return true;
                }
            }
            return false;
        }
    }
}

⏎ com/fasterxml/jackson/databind/util/ViewMatcher.java

 

⇒ Jackson Dataformat Extensions

⇐ Jackson Data Binding Source Code

⇑ Downloading and Reviewing jackson-*.jar

⇑⇑ Jackson - Java JSON library