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Java lang extensions for java6+, a supplement to , replacement of a Guava, commons-lang. Core utilities, Collection utilities, IO utilities, Cache, Configuration library ...

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package com.jn.langx.util.struct.mutable;

/**
 * {@link MutableValue} implementation of type float.
 * When mutating instances of this object, the caller is responsible for ensuring
 * that any instance where exists is set to false must also
 * value set to 0.0F for proper operation.
 */
public class MutableValueFloat extends MutableValue {
    public float value;

    @Override
    public Object toObject() {
        assert exists || 0.0F == value;
        return exists ? value : null;
    }

    @Override
    public void copy(MutableValue source) {
        MutableValueFloat s = (MutableValueFloat) source;
        value = s.value;
        exists = s.exists;
    }

    @Override
    public MutableValue duplicate() {
        MutableValueFloat v = new MutableValueFloat();
        v.value = this.value;
        v.exists = this.exists;
        return v;
    }

    @Override
    public boolean equalsSameType(Object other) {
        assert exists || 0.0F == value;
        MutableValueFloat b = (MutableValueFloat) other;
        return value == b.value && exists == b.exists;
    }

    @Override
    public int compareSameType(Object other) {
        assert exists || 0.0F == value;
        MutableValueFloat b = (MutableValueFloat) other;
        int c = Float.compare(value, b.value);
        if (c != 0) return c;
        if (exists == b.exists) return 0;
        return exists ? 1 : -1;
    }

    @Override
    public int hashCode() {
        assert exists || 0.0F == value;
        return Float.floatToIntBits(value);
    }
}