com.weaverplatform.sp4rql.model.token.BlankToken Maven / Gradle / Ivy

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package com.weaverplatform.sp4rql.model.token;

import com.weaverplatform.sp4rql.model.expression.ExpressionArgument;
import com.weaverplatform.sp4rql.model.solution.SolutionType;
import com.weaverplatform.util.IndentStringBuilder;

import static java.lang.Math.abs;

public class BlankToken extends VariableToken implements ExpressionArgument {

  public BlankToken(String label) {
    super(label);
  }

  @Override
  public Integer resolvesTo() {
    return SolutionType.union(SolutionType.NODE, SolutionType.LITERAL, SolutionType.PREDICATE);
  }

  @Override
  public void buildString(IndentStringBuilder builder) {
    builder.append(String.format("_:%d", abs(hashCode())));
  }

  @Override
  public boolean equals(Object object) {
    if(! (object instanceof BlankToken)) {
      return false;
    }
    return ((BlankToken) object).getLabel().equals(getLabel());
  }
}