io.github.maxymania.powercache.hash.AnyFunnel.java Source code

Introduction

Here is the source code for io.github.maxymania.powercache.hash.AnyFunnel.java

Source

/*
 * Copyright 2015 Simon Schmidt
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.github.maxymania.powercache.hash;

import com.google.common.hash.Funnel;
import com.google.common.hash.PrimitiveSink;

import java.lang.reflect.Field;
import java.lang.reflect.Modifier;

/**
 *
 * @author Simon Schmidt
 */
public class AnyFunnel implements Funnel<Object> {

    private static final long serialVersionUID = -6606932468537196126L;
    static final byte NUL = 0;
    static final byte ONE = -1;
    static final byte MARK = 74; // #74!!!!

    @Override
    public void funnel(Object data, PrimitiveSink sink) {
        funnel(data, sink, 0);
    }

    private void funnel(Object data, PrimitiveSink sink, int dept) {
        if (dept > 80) {
            sink.putByte(ONE);
            return;
        }
        sink.putByte(MARK);
        if (data == null) {
            sink.putByte(NUL);
        } else if (data instanceof byte[]) {
            sink.putBytes((byte[]) data);
        } else if (data instanceof char[]) {
            sink.putString(new CharArray((char[]) data), Util.UTF);
        } else if (data instanceof String) {
            sink.putString((String) data, Util.UTF);
        } else if (data instanceof boolean[]) {
            for (boolean e : (boolean[]) data) {
                sink.putBoolean(e);
            }
        } else if (data instanceof short[]) {
            for (short e : (short[]) data) {
                sink.putShort(e);
            }
        } else if (data instanceof int[]) {
            for (int e : (int[]) data) {
                sink.putInt(e);
            }
        } else if (data instanceof long[]) {
            for (long e : (long[]) data) {
                sink.putLong(e);
            }
        } else if (data instanceof float[]) {
            for (float e : (float[]) data) {
                sink.putFloat(e);
            }
        } else if (data instanceof double[]) {
            for (double e : (double[]) data) {
                sink.putDouble(e);
            }
        } else if (data instanceof Object[]) {
            for (Object e : (Object[]) data) {
                funnel(e, sink);
            }
        } else if (data instanceof Boolean) {
            sink.putBoolean((Boolean) data);
        } else if (data instanceof Byte) {
            sink.putByte((Byte) data);
        } else if (data instanceof Character) {
            sink.putChar((Character) data);
        } else if (data instanceof Short) {
            sink.putShort((Short) data);
        } else if (data instanceof Integer) {
            sink.putInt((Integer) data);
        } else if (data instanceof Long) {
            sink.putLong((Long) data);
        } else if (data instanceof Float) {
            sink.putFloat((Float) data);
        } else if (data instanceof Double) {
            sink.putDouble((Double) data);
        } else {
            putObject(data, sink, dept);
        }
    }

    private void putObject(Object data, PrimitiveSink sink, int dept) {
        for (Field fld : data.getClass().getFields()) {
            if (Modifier.isStatic(fld.getModifiers())) {
                continue;
            }
            sink.putString(fld.getName(), Util.UTF);
            try {
                Object obj = fld.get(data);
                funnel(obj, sink, dept + 1);
            } catch (IllegalArgumentException e) {
            } catch (IllegalAccessException e) {
            }
        }
    }
}