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rx-java Observables for jdbc

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package com.github.davidmoten.rx.jdbc.tuple;

/**
 * An explicitly typed tuple.
 * 
 * @param 
 * @param 
 * @param 
 * @param 
 */
public class Tuple4 {

	private final T1 value1;
	private final T2 value2;
	private final T3 value3;
	private final T4 value4;

	/**
	 * Constructor.
	 * 
	 * @param value1
	 * @param value2
	 * @param value3
	 * @param value4
	 */
	public Tuple4(T1 value1, T2 value2, T3 value3, T4 value4) {
		this.value1 = value1;
		this.value2 = value2;
		this.value3 = value3;
		this.value4 = value4;
	}

	public T1 value1() {
		return value1;
	}

	public T2 value2() {
		return value2;
	}

	public T3 value3() {
		return value3;
	}

	public T4 value4() {
		return value4;
	}

	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + ((value1 == null) ? 0 : value1.hashCode());
		result = prime * result + ((value2 == null) ? 0 : value2.hashCode());
		result = prime * result + ((value3 == null) ? 0 : value3.hashCode());
		result = prime * result + ((value4 == null) ? 0 : value4.hashCode());
		return result;
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		Tuple4 other = (Tuple4) obj;
		if (value1 == null) {
			if (other.value1 != null)
				return false;
		} else if (!value1.equals(other.value1))
			return false;
		if (value2 == null) {
			if (other.value2 != null)
				return false;
		} else if (!value2.equals(other.value2))
			return false;
		if (value3 == null) {
			if (other.value3 != null)
				return false;
		} else if (!value3.equals(other.value3))
			return false;
		if (value4 == null) {
			if (other.value4 != null)
				return false;
		} else if (!value4.equals(other.value4))
			return false;
		return true;
	}

	@Override
	public String toString() {
		return "Tuple4 [value1=" + value1 + ", value2=" + value2 + ", value3="
				+ value3 + ", value4=" + value4 + "]";
	}

}