io.takari.builder.internal.maven.MavenProjectPropertyResolver Maven / Gradle / Ivy

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package io.takari.builder.internal.maven;

import java.util.*;
import java.util.function.Function;

import org.apache.maven.project.MavenProject;

/**
 * Resolves MavenProject properties and a number of well-known "project.*" properties to their
 * string values. Unknown properties are resolved to {@code null} value.
 */
public class MavenProjectPropertyResolver implements Function {

  private static final Map> EXPRESSIONS;

  static {
    Map> expressions = new HashMap<>();

    expressions.put("project.groupId", p -> p.getGroupId());
    expressions.put("project.artifactId", p -> p.getArtifactId());
    expressions.put("project.version", p -> p.getVersion());
    expressions.put("project.basedir", p -> p.getBasedir().getAbsolutePath());
    expressions.put("project.build.directory", p -> p.getBuild().getDirectory());
    expressions.put("project.build.outputDirectory", p -> p.getBuild().getOutputDirectory());
    expressions.put("project.build.testOutputDirectory",
        p -> p.getBuild().getTestOutputDirectory());

    EXPRESSIONS = Collections.unmodifiableMap(expressions);
  }

  private final MavenProject project;

  public MavenProjectPropertyResolver(MavenProject project) {
    this.project = project;
  }

  @Override
  public String apply(String name) {
    // check project properties first
    if (project.getProperties().containsKey(name)) {
      return project.getProperties().getProperty(name);
    }

    // supported project.* expressions
    Function getter = EXPRESSIONS.get(name);
    if (getter != null) {
      return getter.apply(project);
    }

    return null;
  }

}