power-framework/docs/content/Introduction/index.adoc

Power Framework - Documentation

Power Framework is a multipurpose Java library.

class ValueHolder<T> {
    private T value;
    private Class clazz;

    public ValueHolder(T valueIn) {
        this.value = valueIn;
        this.clazz = valueIn == null ? null : valueIn.getClass();
    }

    public final T getValue() {
        return this.value;
    }

    public final Class getClassOfValue() {
        return this.clazz;
    }
}

class IntegerHolder extends ValueHolder<Integer> {

    public IntegerHolder(Integer valueIn) {
        super(valueIn);
    }
}


enum PrimitiveType {
    INT, LONG, FLOAT, DOUBLE, BOOLEAN;
}

class PrimitiveHolder<T> {
    private int intValue = 0;
    private long longValue = 0l;
    private float floatValue = 0f;
    private double doubleValue = 0d;
    private boolean booleanValue = false;
    private final PrimitiveType primitiveType;

    public PrimitiveHolder(int intValueIn) {
        this.intValue = intValueIn;
        this.primitiveType = PrimitiveType.INT;
    }

    public PrimitiveHolder(long longValueIn) {
        this.longValue = longValueIn;
        this.primitiveType = PrimitiveType.LONG;
    }

    public PrimitiveHolder(float floatValueIn) {
        this.floatValue = floatValueIn;
        this.primitiveType = PrimitiveType.FLOAT;
    }

    public PrimitiveHolder(double doubleValueIn) {
        this.doubleValue = doubleValueIn;
        this.primitiveType = PrimitiveType.DOUBLE.INT;
    }

    public PrimitiveHolder(boolean booleanValueIn) {
        this.booleanValue = booleanValueIn;
        this.primitiveType = PrimitiveType.BOOLEAN;
    }

    public int getIntValue() {
        if (this.primitiveType != PrimitiveType.INT) {
            throw new RuntimeException("Unsupported method for primitive type: " + primitiveType);
        }
        return intValue;
    }

    public long getLongValue() {
        if (this.primitiveType != PrimitiveType.LONG) {
            throw new RuntimeException("Unsupported method for primitive type: " + primitiveType);
        }
        return longValue;
    }

    public float getFloatValue() {
        if (this.primitiveType != PrimitiveType.FLOAT) {
            throw new RuntimeException("Unsupported method for primitive type: " + primitiveType);
        }
        return floatValue;
    }

    public double getDoubleValue() {
        if (this.primitiveType != PrimitiveType.DOUBLE) {
            throw new RuntimeException("Unsupported method for primitive type: " + primitiveType);
        }
        return doubleValue;
    }

    public boolean isBooleanValue() {
        if (this.primitiveType != PrimitiveType.BOOLEAN) {
            throw new RuntimeException("Unsupported method for primitive type: " + primitiveType);
        }
        return booleanValue;
    }

    public PrimitiveType getPrimitiveType() {
        return primitiveType;
    }
}

public void test(String[] args) {
    //test
    List<PrimitiveHolder> primitiveHolderList = new ArrayList<>();
    primitiveHolderList.add(new PrimitiveHolder(5));
}