org.nutz.lang.meta.Pair Maven / Gradle / Ivy

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Nutz, which is a collections of lightweight frameworks, each of them can be used independently

There is a newer version: 1.r.72

package org.nutz.lang.meta;

import org.nutz.lang.Lang;
import org.nutz.lang.Strings;

/**
 * 简便的名值对实现
 * 
 * @author zozoh([email protected])
 */
public class Pair {

	public static Pair create(String s) {
		String[] ss = Strings.splitIgnoreBlank(s, "=");
		String name = null;
		String value = null;
		String pattern = PTN_3;
		if (null != ss)
			if (ss.length == 1) {
				name = ss[0];
			} else if (ss.length == 2) {
				name = ss[0];
				if (ss[1].length() > 0) {
					if (ss[1].charAt(0) == '"') {
						value = ss[1].substring(1, ss[1].length() - 1);
						pattern = PTN_3;
					} else if (ss[1].charAt(0) == '\'') {
						value = ss[1].substring(1, ss[1].length() - 1);
						pattern = PTN_2;
					} else {
						value = ss[1];
						pattern = PTN_1;
					}
				}
			}
		Pair re = new Pair(name, value);
		re.pattern = pattern;
		return re;
	}

	public Pair() {}

	private static final String PTN_1 = "%s=%s";
	private static final String PTN_2 = "%s='%s'";
	private static final String PTN_3 = "%s=\"%s\"";

	public Pair(String name, T value) {
		this.name = name;
		this.value = value;
		pattern = PTN_3;
	}

	private String name;

	private T value;

	private String pattern;

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public T getValue() {
		return value;
	}

	public String getValueString() {
		return value == null ? null : value.toString();
	}

	public void setValue(T value) {
		this.value = value;
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj instanceof Pair)
			if (Strings.equals(((Pair) obj).name, name))
				return Lang.equals(((Pair) obj).value, value);
		return false;
	}

	@Override
	public int hashCode() {
		return value.hashCode();
	}

	@Override
	public String toString() {
		String v = null == value ? "" : value.toString();
		v = v.replace("\"", """);
		return String.format(pattern, name, v);
	}

}