feat(jsqlparser): 首次提交

src/main/java/net/sf/jsqlparser/expression/IntervalExpression.java

@@ -0,0 +1,96 @@
+/*-
+ * #%L
+ * JSQLParser library
+ * %%
+ * Copyright (C) 2004 - 2019 JSQLParser
+ * %%
+ * Dual licensed under GNU LGPL 2.1 or Apache License 2.0
+ * #L%
+ */
+package net.sf.jsqlparser.expression;
+
+import net.sf.jsqlparser.parser.ASTNodeAccessImpl;
+
+import java.util.Objects;
+
+public class IntervalExpression extends ASTNodeAccessImpl implements Expression {
+
+    private final boolean intervalKeyword;
+    private String parameter = null;
+    private String intervalType = null;
+    private Expression expression = null;
+
+    public IntervalExpression() {
+        this(true);
+    }
+
+    public IntervalExpression(boolean intervalKeyword) {
+        this.intervalKeyword = intervalKeyword;
+    }
+
+    public IntervalExpression(int value, String type) {
+        this.parameter = null;
+        this.intervalKeyword = true;
+        this.expression = new LongValue(value);
+        this.intervalType = type;
+    }
+
+    public boolean isUsingIntervalKeyword() {
+        return intervalKeyword;
+    }
+
+    public String getParameter() {
+        return parameter;
+    }
+
+    public void setParameter(String parameter) {
+        this.parameter = parameter;
+    }
+
+    public String getIntervalType() {
+        return intervalType;
+    }
+
+    public void setIntervalType(String intervalType) {
+        this.intervalType = intervalType;
+    }
+
+    public Expression getExpression() {
+        return expression;
+    }
+
+    public void setExpression(Expression expression) {
+        this.expression = expression;
+    }
+
+    @Override
+    public String toString() {
+        return (intervalKeyword ? "INTERVAL " : "")
+                + Objects.toString(expression, parameter)
+                + (intervalType != null ? " " + intervalType : "");
+    }
+
+    @Override
+    public <T, S> T accept(ExpressionVisitor<T> expressionVisitor, S context) {
+        return expressionVisitor.visit(this, context);
+    }
+
+    public IntervalExpression withParameter(String parameter) {
+        this.setParameter(parameter);
+        return this;
+    }
+
+    public IntervalExpression withIntervalType(String intervalType) {
+        this.setIntervalType(intervalType);
+        return this;
+    }
+
+    public IntervalExpression withExpression(Expression expression) {
+        this.setExpression(expression);
+        return this;
+    }
+
+    public <E extends Expression> E getExpression(Class<E> type) {
+        return type.cast(getExpression());
+    }
+}