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Lines changed: 17 additions & 0 deletions

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	`1`	`+package com.mayaha.dp.intepreter;`
	`2`	`+`
	`3`	`+public class AndExpression implements Expression {`
	`4`	`+`
	`5`	`+ private Expression expr1 = null;`
	`6`	`+ private Expression expr2 = null;`
	`7`	`+`
	`8`	`+ public AndExpression(Expression expr1, Expression expr2) {`
	`9`	`+ this.expr1 = expr1;`
	`10`	`+ this.expr2 = expr2;`
	`11`	`+ }`
	`12`	`+`
	`13`	`+ @Override`
	`14`	`+ public boolean interpret(String context) {`
	`15`	`+ return expr1.interpret(context) && expr2.interpret(context);`
	`16`	`+ }`
	`17`	`+}`

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	`1`	`+package com.mayaha.dp.intepreter;`
	`2`	`+`
	`3`	`+public interface Expression {`
	`4`	`+ public boolean interpret(String context);`
	`5`	`+}`

Lines changed: 26 additions & 0 deletions

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	`1`	`+package com.mayaha.dp.intepreter;`
	`2`	`+//创建规则和演示表达式的解析`
	`3`	`+public class Main {`
	`4`	`+ //规则:Robert 和 John 是男性`
	`5`	`+ public static Expression getMaleExpression(){`
	`6`	`+ Expression robert = new TerminalExpression("Robert");`
	`7`	`+ Expression john = new TerminalExpression("John");`
	`8`	`+ return new OrExpression(robert, john);`
	`9`	`+ }`
	`10`	`+`
	`11`	`+ //规则:Julie 是一个已婚的女性`
	`12`	`+ public static Expression getMarriedWomanExpression(){`
	`13`	`+ Expression julie = new TerminalExpression("Julie");`
	`14`	`+ Expression married = new TerminalExpression("Married");`
	`15`	`+ return new AndExpression(julie, married);`
	`16`	`+ }`
	`17`	`+`
	`18`	`+ public static void main(String[] args) {`
	`19`	`+ Expression isMale = getMaleExpression();`
	`20`	`+ Expression isMarriedWoman = getMarriedWomanExpression();`
	`21`	`+`
	`22`	`+ System.out.println("John is male? " + isMale.interpret("John"));`
	`23`	`+ System.out.println("Julie is a married women? "`
	`24`	`+ + isMarriedWoman.interpret("Married Julie"));`
	`25`	`+ }`
	`26`	`+}`

Lines changed: 17 additions & 0 deletions

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	`1`	`+package com.mayaha.dp.intepreter;`
	`2`	`+`
	`3`	`+public class OrExpression implements Expression {`
	`4`	`+`
	`5`	`+ private Expression expr1 = null;`
	`6`	`+ private Expression expr2 = null;`
	`7`	`+`
	`8`	`+ public OrExpression(Expression expr1, Expression expr2) {`
	`9`	`+ this.expr1 = expr1;`
	`10`	`+ this.expr2 = expr2;`
	`11`	`+ }`
	`12`	`+`
	`13`	`+ @Override`
	`14`	`+ public boolean interpret(String context) {`
	`15`	`+ return expr1.interpret(context) \|\| expr2.interpret(context);`
	`16`	`+ }`
	`17`	`+}`

Lines changed: 18 additions & 0 deletions

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	`1`	`+package com.mayaha.dp.intepreter;`
	`2`	`+`
	`3`	`+public class TerminalExpression implements Expression {`
	`4`	`+`
	`5`	`+ private String data;`
	`6`	`+`
	`7`	`+ public TerminalExpression(String data){`
	`8`	`+ this.data = data;`
	`9`	`+ }`
	`10`	`+`
	`11`	`+ @Override`
	`12`	`+ public boolean interpret(String context) {`
	`13`	`+ if(context.contains(data)){`
	`14`	`+ return true;`
	`15`	`+ }`
	`16`	`+ return false;`
	`17`	`+ }`
	`18`	`+}`

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