I'm creating an enum with reusable pieces of code and the indentation is giving me trouble. We have Checkstyle configured to run as a git commit hook (as well as in out IDE). Here is an example code block for what I am trying to do:

package org.kapunga.weather;

/**
* @author kapunga
*/
public enum FloatMapper {
    IDENTITY("identity", o -> o.floatValue()),
    CEL_TO_FAREN("celToFaren", t -> {
        float f = t.floatValue();
        float i = f * (float) 1.8;

        return i + 32;
    }),
    FAREN_TO_CEL("farenToCel", t -> {
        float f = t.floatValue();
        float i = f - 32;

        return i / (float) 1.8;
    });

    public final String name;
    public final FloatMappingFunction func;

    FloatMapper(String name, FloatMappingFunction func) {
        this.name = name;
        this.func = func;
    }

    @FunctionalInterface
    public interface FloatMappingFunction {
        float map(Number n);
    }
}

When I try and commit this, I get checkstyle warnings:

thor@ma-lt-thor ~/work/r9/trunk (client)$ git commit project/org/kapunga/weather/FloatMapper.java
Java changes found, running Checkstyle.
Checking source files for tabs.
project/org/kapunga/weather/FloatMapper.java:9: warning: 'member def type' have incorrect indentation level 8, expected level should be 4.
project/org/kapunga/weather/FloatMapper.java:10: warning: 'member def type' have incorrect indentation level 8, expected level should be 4.
project/org/kapunga/weather/FloatMapper.java:15: warning: 'member def type' have incorrect indentation level 8, expected level should be 4.
project/org/kapunga/weather/FloatMapper.java:16: warning: 'member def type' have incorrect indentation level 8, expected level should be 4.
Commit aborted.

When I fix this to the following (Which I would argue is less readable):

package org.kapunga.weather;

/**
* @author kapunga
*/
public enum FloatMapper {
    IDENTITY("identity", o -> o.floatValue()),
    CEL_TO_FAREN("celToFaren", t -> {
    float f = t.floatValue();
    float i = f * (float) 1.8;

    return i + 32;
    }),
    FAREN_TO_CEL("farenToCel", t -> {
    float f = t.floatValue();
    float i = f - 32;

    return i / (float) 1.8;
    });

    public final String name;
    public final FloatMappingFunction func;

    FloatMapper(String name, FloatMappingFunction func) {
        this.name = name;
        this.func = func;
    }

    @FunctionalInterface
    public interface FloatMappingFunction {
        float map(Number n);
    }
}

I get errors as well:

thor@ma-lt-thor ~/work/r9/trunk (client)$ git commit project/org/kapunga/weather/FloatMapper.java
Java changes found, running Checkstyle.
Checking source files for tabs.
project/org/kapunga/weather/FloatMapper.java:9: warning: 'block' child have incorrect indentation level 4, expected level should be 8.
project/org/kapunga/weather/FloatMapper.java:10: warning: 'block' child have incorrect indentation level 4, expected level should be 8.
project/org/kapunga/weather/FloatMapper.java:12: warning: 'block' child have incorrect indentation level 4, expected level should be 8.
project/org/kapunga/weather/FloatMapper.java:15: warning: 'block' child have incorrect indentation level 4, expected level should be 8.
project/org/kapunga/weather/FloatMapper.java:16: warning: 'block' child have incorrect indentation level 4, expected level should be 8.
project/org/kapunga/weather/FloatMapper.java:18: warning: 'block' child have incorrect indentation level 4, expected level should be 8.
Commit aborted.

So as you can see, I can't get this to agree on a correct indentation level. I think the first example should be correct, the second example makes it hard to see where each enum begins. When I do something like this:

FloatMappingFunction celToFaren = t -> {
    float f = t.floatValue();
    float i = f * (float) 1.8;

    return i + 32;
};

I have no checkstyle errors.