package com.jclark.xsl.expr;

import com.jclark.xsl.om.*;

class AlternativesPattern implements TopLevelPattern {
  private TopLevelPattern pattern1;
  private PathPattern pattern2;
  
  AlternativesPattern(TopLevelPattern pattern1, PathPattern pattern2) {
    this.pattern1 = pattern1;
    this.pattern2 = pattern2;
  }

  public boolean matches(Node node, ExprContext context) throws XSLException {
    return pattern1.matches(node, context) || pattern2.matches(node, context);
  }

  public PathPattern[] getAlternatives() {
    PathPattern[] tem = pattern1.getAlternatives();
    PathPattern[] result = new PathPattern[tem.length + 1];
    System.arraycopy(tem, 0, result, 0, tem.length);
    result[result.length - 1] = pattern2;
    return result;
  }
}