Add LdapClient

Closes gh-675

Author: jzheaux

core/src/main/java/org/springframework/ldap/core/DefaultLdapClient.java

@@ -0,0 +1,91 @@
+package org.springframework.ldap.core;
+
+import java.util.function.Consumer;
+import java.util.function.Supplier;
+
+import javax.naming.directory.SearchControls;
+
+class DefaultLdapClientBuilder implements LdapClient.Builder {
+	private ContextSource contextSource;
+
+	private Supplier<SearchControls> searchControlsSupplier = () -> {
+		SearchControls controls = new SearchControls();
+		controls.setSearchScope(SearchControls.SUBTREE_SCOPE);
+		controls.setCountLimit(0);
+		controls.setTimeLimit(0);
+		return controls;
+	};
+
+	private boolean ignorePartialResultException = false;
+
+	private boolean ignoreNameNotFoundException = false;
+
+	private boolean ignoreSizeLimitExceededException = true;
+
+	DefaultLdapClientBuilder() {}
+
+	DefaultLdapClientBuilder(ContextSource contextSource,
+							 Supplier<SearchControls> searchControlsSupplier) {
+		this.contextSource = contextSource;
+		this.searchControlsSupplier = searchControlsSupplier;
+	}
+
+	@Override
+	public DefaultLdapClientBuilder contextSource(ContextSource contextSource) {
+		this.contextSource = contextSource;
+		return this;
+	}
+
+	@Override
+	public DefaultLdapClientBuilder defaultSearchControls(Supplier<SearchControls> searchControlsSupplier) {
+		this.searchControlsSupplier = searchControlsSupplier;
+		return this;
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	@Override
+	public DefaultLdapClientBuilder ignorePartialResultException(boolean ignore) {
+		this.ignorePartialResultException = ignore;
+		return this;
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	@Override
+	public DefaultLdapClientBuilder ignoreNameNotFoundException(boolean ignore) {
+		this.ignoreNameNotFoundException = ignore;
+		return this;
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	@Override
+	public DefaultLdapClientBuilder ignoreSizeLimitExceededException(boolean ignore) {
+		this.ignoreSizeLimitExceededException = ignore;
+		return this;
+	}
+
+	@Override
+	public DefaultLdapClientBuilder apply(Consumer<LdapClient.Builder> builderConsumer) {
+		builderConsumer.accept(this);
+		return this;
+	}
+
+	@Override
+	public DefaultLdapClientBuilder clone() {
+		return new DefaultLdapClientBuilder(this.contextSource, this.searchControlsSupplier);
+	}
+
+	@Override
+	public LdapClient build() {
+		DefaultLdapClient client = new DefaultLdapClient(this.contextSource, this.searchControlsSupplier);
+		client.setIgnorePartialResultException(this.ignorePartialResultException);
+		client.setIgnoreSizeLimitExceededException(this.ignoreSizeLimitExceededException);
+		client.setIgnoreNameNotFoundException(this.ignoreNameNotFoundException);
+		return client;
+	}
+}