Example usage for org.springframework.core.env ConfigurableEnvironment resolveRequiredPlaceholders

Introduction

In this page you can find the example usage for org.springframework.core.env ConfigurableEnvironment resolveRequiredPlaceholders.

Prototype

String resolveRequiredPlaceholders(String text) throws IllegalArgumentException;

Source Link

Document

Resolve ${...} placeholders in the given text, replacing them with corresponding property values as resolved by #getProperty .

Usage

From source file:org.springframework.test.context.support.TestPropertySourceUtils.java

/**
 * Add the {@link Properties} files from the given resource {@code locations}
 * to the supplied {@link ConfigurableEnvironment environment}.
 * <p>Property placeholders in resource locations (i.e., <code>${...}</code>)
 * will be {@linkplain Environment#resolveRequiredPlaceholders(String) resolved}
 * against the {@code Environment}./*  w w w. j  a  v  a 2s. c  o  m*/
 * <p>Each properties file will be converted to a {@link ResourcePropertySource}
 * that will be added to the {@link PropertySources} of the environment with
 * highest precedence.
 * @param environment the environment to update; never {@code null}
 * @param resourceLoader the {@code ResourceLoader} to use to load each resource;
 * never {@code null}
 * @param locations the resource locations of {@code Properties} files to add
 * to the environment; potentially empty but never {@code null}
 * @since 4.3
 * @see ResourcePropertySource
 * @see TestPropertySource#locations
 * @see #addPropertiesFilesToEnvironment(ConfigurableApplicationContext, String...)
 * @throws IllegalStateException if an error occurs while processing a properties file
 */
public static void addPropertiesFilesToEnvironment(ConfigurableEnvironment environment,
        ResourceLoader resourceLoader, String... locations) {

    Assert.notNull(environment, "'environment' must not be null");
    Assert.notNull(resourceLoader, "'resourceLoader' must not be null");
    Assert.notNull(locations, "'locations' must not be null");
    try {
        for (String location : locations) {
            String resolvedLocation = environment.resolveRequiredPlaceholders(location);
            Resource resource = resourceLoader.getResource(resolvedLocation);
            environment.getPropertySources().addFirst(new ResourcePropertySource(resource));
        }
    } catch (IOException ex) {
        throw new IllegalStateException("Failed to add PropertySource to Environment", ex);
    }
}

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