Java Thread Callable resolveCompositeKey(final String key, final Map props)

Description

resolve Composite Key

License

Apache License

Declaration

private static String resolveCompositeKey(final String key, final Map<String, Object> props) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.util.Map;
import java.util.Properties;

import java.util.concurrent.Callable;

public class Main {
    private static String resolveCompositeKey(final String key, final Properties props) {
        String value = null;// w w  w. ja  v a  2  s .c om

        // Look for the comma
        final int comma = key.indexOf(',');
        if (comma > -1) {
            // If we have a first part, try resolve it
            if (comma > 0) {
                // Check the first part
                final String key1 = key.substring(0, comma);
                if (props != null) {
                    value = props.getProperty(key1);
                } else {
                    value = System.getProperty(key1);
                }
            }
            // Check the second part, if there is one and first lookup failed
            if (value == null && comma < key.length() - 1) {
                final String key2 = key.substring(comma + 1);
                if (props != null) {
                    value = props.getProperty(key2);
                } else {
                    value = System.getProperty(key2);
                }
            }
        }
        // Return whatever we've found or null
        return value;
    }

    private static String resolveCompositeKey(final String key, final Map<String, Object> props) {
        String value = null;

        // Look for the comma
        final int comma = key.indexOf(',');
        if (comma > -1) {
            // If we have a first part, try resolve it
            if (comma > 0) {
                // Check the first part
                final String key1 = key.substring(0, comma);
                if (props != null) {
                    Object o = props.get(key1);
                    if (o instanceof Callable) {
                        try {
                            o = ((Callable) o).call();
                        } catch (final Exception e) {
                            ;
                        }
                    }
                    if (o != null) {
                        value = String.valueOf(o);
                    }
                } else {
                    value = System.getProperty(key1);
                }
            }
            // Check the second part, if there is one and first lookup failed
            if (value == null && comma < key.length() - 1) {
                final String key2 = key.substring(comma + 1);
                if (props != null) {
                    Object o = props.get(key2);
                    if (o instanceof Callable) {
                        try {
                            o = ((Callable) o).call();
                        } catch (final Exception e) {
                            ;
                        }
                    }
                    if (o != null) {
                        value = String.valueOf(o);
                    }
                } else {
                    value = System.getProperty(key2);
                }
            }
        }
        // Return whatever we've found or null
        return value;
    }
}

Related

1. invokeBulkActions(Collection> tasks)
2. max(final double[] a, final double[] b)
3. minScalar(final double[] a, final double scalar)
4. powerTo(final double base, final double[] exponents)
5. repeatedlyTry(Callable task, int maxRounds, long backoff)
6. resolveSingle(Object object)
7. runAndRethrowRuntimeExceptionOnFailure(final Callable operation, final String exceptionMessage)
8. runConcurrently(final Callable task)
9. runConcurrently(final Callable task)