Main.java Source code

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Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright 2011-2013 HTTL Team.
 *  
 * 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.
 */

import java.lang.reflect.Array;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;

import java.util.List;
import java.util.Map;

import java.util.Set;

public class Main {
    public static <K, V> Map<K, V> merge(Map<K, V> c1, Map<K, V> c2) {
        if (c1 == null || c1.size() == 0) {
            return c2;
        }
        if (c2 == null || c2.size() == 0) {
            return c1;
        }
        Map<K, V> all = new HashMap<K, V>(c1.size() + c2.size());
        all.putAll(c1);
        all.putAll(c2);
        return all;
    }

    public static <T> Collection<T> merge(Collection<T> c1, Collection<T> c2) {
        if (c1 == null || c1.size() == 0) {
            return c2;
        }
        if (c2 == null || c2.size() == 0) {
            return c1;
        }
        Collection<T> all = (c1 instanceof List ? new ArrayList<T>(c1.size() + c2.size())
                : new HashSet<T>(c1.size() + c2.size()));
        all.addAll(c1);
        all.addAll(c2);
        return all;
    }

    public static <T> Set<T> merge(Set<T> c1, Set<T> c2) {
        if (c1 == null || c1.size() == 0) {
            return c2;
        }
        if (c2 == null || c2.size() == 0) {
            return c1;
        }
        Set<T> all = new HashSet<T>(c1.size() + c2.size());
        all.addAll(c1);
        all.addAll(c2);
        return all;
    }

    public static <T> List<T> merge(List<T> c1, List<T> c2) {
        if (c1 == null || c1.size() == 0) {
            return c2;
        }
        if (c2 == null || c2.size() == 0) {
            return c1;
        }
        List<T> all = new ArrayList<T>(c1.size() + c2.size());
        all.addAll(c1);
        all.addAll(c2);
        return all;
    }

    @SuppressWarnings("unchecked")
    public static <T> T[] merge(T[] c1, T[] c2) {
        if (c1 == null || c1.length == 0) {
            return c2;
        }
        if (c2 == null || c2.length == 0) {
            return c1;
        }
        Class<?> t;
        if (c1.getClass().isAssignableFrom(c2.getClass())) {
            t = c1.getClass().getComponentType();
        } else if (c2.getClass().isAssignableFrom(c1.getClass())) {
            t = c2.getClass().getComponentType();
        } else {
            throw new IllegalStateException("Can not merge " + c1.getClass().getCanonicalName() + " and "
                    + c2.getClass().getCanonicalName());
        }
        T[] all = (T[]) Array.newInstance(t, c1.length + c2.length);
        System.arraycopy(c1, 0, all, 0, c1.length);
        System.arraycopy(c2, 0, all, c1.length, c2.length);
        return all;
    }

    @SuppressWarnings("unchecked")
    public static <T> T[] merge(T[] c1, Collection<T> c2) {
        return merge(c1, c2 == null ? null : (T[]) c2.toArray(new Object[0]));
    }

    public static <T> T[] merge(Collection<T> c1, T[] c2) {
        return merge(c2, c2 == null ? null : Arrays.asList(c2));
    }

    public static boolean[] merge(boolean[] c1, boolean[] c2) {
        if (c1 == null || c1.length == 0) {
            return c2;
        }
        if (c2 == null || c2.length == 0) {
            return c1;
        }
        boolean[] all = new boolean[c1.length + c2.length];
        System.arraycopy(c1, 0, all, 0, c1.length);
        System.arraycopy(c2, 0, all, c1.length, c2.length);
        return all;
    }

    public static char[] merge(char[] c1, char[] c2) {
        if (c1 == null || c1.length == 0) {
            return c2;
        }
        if (c2 == null || c2.length == 0) {
            return c1;
        }
        char[] all = new char[c1.length + c2.length];
        System.arraycopy(c1, 0, all, 0, c1.length);
        System.arraycopy(c2, 0, all, c1.length, c2.length);
        return all;
    }

    public static byte[] merge(byte[] c1, byte[] c2) {
        if (c1 == null || c1.length == 0) {
            return c2;
        }
        if (c2 == null || c2.length == 0) {
            return c1;
        }
        byte[] all = new byte[c1.length + c2.length];
        System.arraycopy(c1, 0, all, 0, c1.length);
        System.arraycopy(c2, 0, all, c1.length, c2.length);
        return all;
    }

    public static short[] merge(short[] c1, short[] c2) {
        if (c1 == null || c1.length == 0) {
            return c2;
        }
        if (c2 == null || c2.length == 0) {
            return c1;
        }
        short[] all = new short[c1.length + c2.length];
        System.arraycopy(c1, 0, all, 0, c1.length);
        System.arraycopy(c2, 0, all, c1.length, c2.length);
        return all;
    }

    public static int[] merge(int[] c1, int[] c2) {
        if (c1 == null || c1.length == 0) {
            return c2;
        }
        if (c2 == null || c2.length == 0) {
            return c1;
        }
        int[] all = new int[c1.length + c2.length];
        System.arraycopy(c1, 0, all, 0, c1.length);
        System.arraycopy(c2, 0, all, c1.length, c2.length);
        return all;
    }

    public static long[] merge(long[] c1, long[] c2) {
        if (c1 == null || c1.length == 0) {
            return c2;
        }
        if (c2 == null || c2.length == 0) {
            return c1;
        }
        long[] all = new long[c1.length + c2.length];
        System.arraycopy(c1, 0, all, 0, c1.length);
        System.arraycopy(c2, 0, all, c1.length, c2.length);
        return all;
    }

    public static float[] merge(float[] c1, float[] c2) {
        if (c1 == null || c1.length == 0) {
            return c2;
        }
        if (c2 == null || c2.length == 0) {
            return c1;
        }
        float[] all = new float[c1.length + c2.length];
        System.arraycopy(c1, 0, all, 0, c1.length);
        System.arraycopy(c2, 0, all, c1.length, c2.length);
        return all;
    }

    public static double[] merge(double[] c1, double[] c2) {
        if (c1 == null || c1.length == 0) {
            return c2;
        }
        if (c2 == null || c2.length == 0) {
            return c1;
        }
        double[] all = new double[c1.length + c2.length];
        System.arraycopy(c1, 0, all, 0, c1.length);
        System.arraycopy(c2, 0, all, c1.length, c2.length);
        return all;
    }
}